TOREX XCM524 User Manual

■



■

XCM524 Series

ETR2428-003

600mA Synchronous Step-Down DC/DC Converter + 500mA LDO with Delay Function Voltage Detector

GENERAL DESCRIPTION

The XCM524 series is a multi combination module IC which comprises of a 600mA driver transistor built-in synchronous step–down DC/DC converter and a high speed, high current LDO regulator with voltage detector function. The device is housed in small USP-12B01 package which is ideally suited for space conscious applications. The DC/DC converter and the LDO blocks are isolated in the package so that noise interference from the DC/DC to the LDO regulator is minimal.

The DC/DC converter block with a built-in 0.42ΩP-channel MOS driver transistor and 0.52ΩN-channel MOS switching

transistor, designed to allow the use of ceramic capacitors. The DC/DC enables a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors connected externally. The LDO regulator block is precise, low noise, high ripple rejection, low dropout positive voltage regulators with built-in voltage detector. The LDO is also compatible with low ESR ceramic output capacitors. Good output stability is maintained during load fluctuations due to its excellent transient response. The current limiter's fold back circuit also operates as a short circuit protection for the output current. The voltage detector block of the contains delay circuit. The delay time can be controlled by an external capacitor. The detector monitors the input voltage of the voltage regulator.

■APPLICATIONS

●BD, DVD drives

●HDD drives

●Cameras, Video recorders

●Mobile phones, Smart phones

●Various general-purpose power supplies

TYPICAL APPLICATION CIRCUIT

(TOP VIEW)

FEATURES

Input Voltage Range : 2.7V ~ 6.0V

Output Voltage Options : 0.8V ~ 4.0V (±2％)

High Efficiency : 92% (TYP.) Output Current : 600mA (MAX.) Oscillation Frequency : 1.2MHz, 3.0MHz (+15%) Current Limiter Circuit Built-In : Constant Current & Latching Control Methods : PWM PWM/PFM Auto

*Performance depends on external components and wiring on PCB wiring.

<Regulator Block> Maximum Output Current

Dropout Voltage : 200mV@I Operating Voltage Range

Output Voltage Options : 0.9V ~ 5.1V (0.1V increments, ±2％) Detect Voltage Options : 2.0V ~ 5.5V (0.1V increments, ±2％) VR.VD Temperature Stability :±100ppm/℃ (TYP.)

High Ripple Rejection : 65dB (@10kHz) Low ESR Capacitor : Ceramic Capacitor Operating Temperature Range Package : USP-12B01

Environmentally Friendly : EU RoHS Compliant, Pb Free

: 500mA (Limiter 600mA TYP.)

(2.5V≦V

: 2.0V ~ 6.0V

: -40℃ ~ +85℃

≦4.9V)

ROUT

=100mA (TYP.)

ROUT

1/52

■

XCM524 Series

PIN CONFIGURATIOIN

*DC/DC Ground pin (No.5 and 8) should be short before using the IC.

* A dissipation pad on the reverse side of the package should be electrically isolated.

*1: Voltage level of the VDR’s dissipation pad should be V *2: Voltage level of the DC/DC’s dissipation pad should be V

Care must be taken for an electrical potential of each dissipation pad so as to enhance mounting strength and heat release when the pad needs to be connected to the circuit.

PIN ASSIGNMENT

PIN No XCM524 FUNCTIONS

1 VDOUT VDR Block: VD Output Voltage

2 VSS VDR Block: Ground

3 Cd VDR Block: Delay Capacitor connection

4 V

5 PGND DC/DC Block: Power Ground

6 Lx DC/DC Block: Switching Connection

7 DCOUT DC/DC Block: Output Voltage

8 AGND DC/DC Block: Analog Ground

9 EN2 DC/DC Block: ON/OFF Control

10 V

11 NC No Connection

12 V

(TOP VIEW)

(BOTTOM VIEW)

SS

DC/DC Block: Power Input

IN2

VDR Block: Power Input

IN1

VDR Block: LDO Output

ROUT

PIN No XCM524 VDR DC/DC

level.

SS

1 V

2 VSS V

3 Cd Cd -

4 V

5 PGND - PGND

6 Lx - Lx

7 DCOUT - VOUT

8 AGND - AGND

9 EN2 - CE

10 V

11 NC - -

12 V

V

DOUT

- VIN

IN2

V

IN1

V

ROUT

DOUT

SS

IN1

ROUT

-

2/52

X

■

PRODUCT CLASSIFICATION

●Ordering Information

XCM524A①②③④⑤-⑥ XCM524B①②③④⑤-⑥

(*1)

 DC/DC Block: PWM fixed control

(*1)

 DC/DC Block: PWM/PFM automatic switching control

DESIGNATOR DESCRIPTION SYMBOL DESCRIPTION

① Oscillation Frequency and Options － See the chart below

②③ Output Voltage － See the chart below

CM524

Series

④⑤-⑥

(*1)

The XCM524 series is Halogen and Antimony free as well as being fully RoHS compliant.

(*2)

The device orientation is fixed in its embossed tape pocket.

Packages

Taping Type

(*2)

DR-G USP-12B01

●DESIGNATOR①

DC/DC BLOCK VDR BLOCK

①

A 1.2M Not Available Standard Available VIN B 3.0M Not Available Standard Available VIN C 1.2M Available High Speed Available VIN D 3.0M Available High Speed Available VIN

OSCILLATION

FREQUENCY

CL

DISCHARGE

SOFT START

VD DELAY

FUNCTION

VD SENSE PIN

Active Low Detect Active Low Detect Active Low Detect Active Low Detect

●DESIGNATOR②③

②③

DCOUT

V

VDF

ROUT

V

01 1.0 3.3 3.7 02 1.2 3.3 3.7 03 1.5 3.3 3.7 04 1.8 3.3 4.2 05 3.3 1.8 2.8 06 1.8 2.5 2.8

*This series are semi-custom products. For other combinations of output voltages please consult with your Torex sales contact.

VD OUTPUT

LOGIC

3/52

■

A

XCM524 Series

BLOCK DIAGRAMS

Step-Down DC/DC

R3

R4

Error Amp.

Vref with Soft Start, CE

UVLO

Phase Compensation

VSHORT

PWM/PFM Selector

UVLO Cmp

PWM Comparator

Current Feedback

Current Limit

Logic

Synch Buffer

Drive

Ramp Wave

Generator

OSC

CE/MODE Control Logic

Lx

CE

V

OUT

R2

R1

V

IN

V

SS

V

OUT

R2

R1

V

IN

V

SS

* A fixed PWM control scheme because that the “CE Control Logic” outputs a low level signal to the “PWM/PFM Selector”.

* An auto PWM/PFM switching control scheme because the “CE Control Logic” outputs a high level signal to the “PWM/PFM Selector”.

*Diodes inside the circuit are an ESD protection diode and a parasitic diode.

  Ta=25℃

BSOLUTE MAXIMUM RATINGS

PAR AMETER SYMBOL RATINGS UNITS

V

VROUT Current I

VROUT Voltage V

VDOUT Current I

VDOUT Voltage V

VIN2 Current

DCOUT Voltage V

EN2 Voltage V

Power

Dissipation

Voltage V

IN1

Cd Voltage VCd V

Lx Voltage

Lx Current I

USP-12B01 150

USP-12B01

(*2)

(PCB mounted

)

7.0 V

IN1

700

ROUT

V

ROUT

50 mA

DOUT

V

DOUT

V

-0.3 〜 6.5 V

IN2

V

-0.3 〜 V

Lx

-0.3 〜 6.5 V

DCOUT

-0.3 〜 6.5 V

EN2

±1500 mA

Lx

Pd

- 0.3 〜 V

SS

- 0.3 〜 V

SS

800 (Only 1ch operation)

600 (Both 2ch operation)

Junction Temperature Tj 125 ℃

Operating Temperature Range Topr - 40 〜 + 85 ℃

Storage Temperature Range Tstg - 55 〜 + 125 ℃

*1 I

= Less than Pd /（V

ROUT

*2 The power dissipation figure shown is PCB mounted. Please refer to page 50 for details. Please also note that the power dissipation is

for each channel. 

IN1-VROUT

）

Step-Down DC/DC

Available with CL Discharge, High Speed Soft-Start

R3

R4

Phase Compensation

Error Amp.

VSHORT

Vref with

PWM/PFM

Soft Start,

Selector

CE

UVLO Cmp

UVLO

(*1)

mA

+ 0.3 V

IN1

PWM Comparator

Current Feedback

Current Limit

Logic

Synch Buffer

Drive

Ramp Wave

Generator

OSC

CE/MODE Control Logic

-0.3 〜 7.0 V

+ 0.3 V

IN1

+ 0.3 ≦ 6.5 V

IN2

CE/

mW

Lx

CE

4/52

X

CM524

Series

■ELECTRICAL CHARACTERISTICS

●XCM524xx 1ch (VDR Block)

Ta =2 5 ℃

PAR A M E T ER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT

Output Voltage

Maximum Output Current

(0.9 ~ 2.4V)

Maximum Output Current

(2.5 ~ 4.9V)

Load Regulation △V

Dropout Voltage

Supply Current

(FV / FX / FY / FZ series)

Line Regulation

Input Voltage V

Output Voltage

Temperature Characteristics

VOLTAGE REGULATOR

Ripple Rejection Rate PSRR

(*2, 3)

V

(*4)

(V

(△Topr･V

I

ROUT(E)

I

ROUTMAX

I

ROUTMAX

V

1mA≦I

ROUT

Higher than V

Vdif1 Vdif2

IDD

△V

IN1･VROUT

△V

/

ROUT

)

2.0 - 6.0 V -

IN1

/

ROUT

)

ROUT

V

ROUT(T)

V

ROUT(T)

V

≦0.9V, 2.0V≦V

ROUT(T)

V

ROUT(T)

-40℃≦Topr≦85℃

V

=[V

IN1

ROUT(T)

When V

V

IN1

When V

V

IN1

I

ROUT

=30mA ×0.98 V

ROUT

IN1=VROUT(T)

ROUT(T)

I

ROUT

I

ROUT

IN1=VROUT(T)

≦0.9V, V

+1.0V≦V

I

ROUT

≦1.75V, I

I

ROUT

+2.0V 400 - - mA ①

+2.0V

= 4.0V, V

≦100mA - 15 50 mV ①

ROUT

IN1

=30mA

=100mA

+1.0V

=2.0V

IN1

≦6.0V

IN1

≦6.0V

ROUT

IN1

=10mA

=30mA

+1.0]V+0.5Vp-pAC

=2.25V+0.5Vp-pAC

=5.75V+0.5Vp-pAC

ROUT(T)

≧4.75V,

≦1.25V,

ROUT(T)

=50mA, f=10kHz

=6.0V

×1.02 V

ROUT(T)

①

500 - - mA ①

E-1 E-2

mV ① mV ①

- 90 145 μA ②

- 0.01 0.20 % / V ①

- ±100 - ppm /℃ ①

- 65 - dB ③

Current Limiter

(2.4V or less)

Current Limiter

(2.5V or more)

Short-Circuit Current I

Detect Voltage

Hysteresis Range

Supply Current

VOLTAGE DETECTOR

Detect Voltage

(*7, 8)

V

(*8)

V

(*9)

I

Temperature Stability

Delay Resistance R

NOTE:

*1 : Unless otherwise stated, (V

*2 : V

*3 : V

(i.e. the VR output voltage when "V

*4 : Vdif={V

*5 : A voltage equal to 98% of the VR output voltage whenever a stabilized V

*6 : V

*7 : V

*8 : V

*9 : VD output current is sink current at detect.

* The electrical characteristics above are when the other channel is in stop.

：Specified VR output voltage

ROUT(T)

：Effective VR output voltage. Refer to the E-0 chart for values less than V

ROUT(E)

(*6)

1

IN

1：The input voltage when VOUT1, which appears as input voltage is gradually decreased.

IN

：Specified detect voltage value

DF(T)

：Effective detect voltage value.

DF(E)

(*5)

-V

1

}

ROUT

I

V

RLIMl

I

RLIM

RSHORT

DF(E)

HYS

DOUT

△V

(Topr･V

delay

IN1=VROUT(T)

Higher than V

×0.98 V

V

/

DF

)

DF

Delay Resistance =6.0V/Delay Current

+1.0V)

+1.0V" is provided at the VIN pin while maintaining a certain IROUT value).

ROUT(T)

IN1=VROUT(T)

V

IN1=VROUT(T)

V

IN1=VROUT(T)

= 0.5V

DOUT

-40℃≦Topr≦85℃ - ±100 - ppm /℃ ④

V

IN1

+2.0V - 600 - mA ①

+2.0V

= 4.0V, V

ROUT(T)

+2.0V

= 4.0V, V

ROUT(T)

V

= 2.0V 3.0 6.0 -

IN1

V

= 3.0V 4.0 8.0 -

IN1

V

= 4.0V 5.0 10.0 -

IN1

V

= 5.0V 7.0 12.0 -

IN1

V

= 6.0V 10.0 15.0 -

IN1

=6.0V, Cd=0V

IN1

=6.0V

500 600 - mA ①

- 50 - mA ① ×1.02 V ④

DF(T)

V ×0.02

DF(T)

V

DF(T)

×0.05

V

DF(T)

×0.08

300 500 700 kΩ ⑥

≦1.5V.

DF(T)

ROUT1=IROUT{VROUT(T)+1.0V} is input.

V ④

mA ⑤

5/52

XCM524 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●Dropout Voltage

SYMBOL E-0 E-1 E-1

 PARAMETER

NOMINAL DETECT VOLTAGE OUTPUT VOLTAGE

 

V

ROUT(T)

V

DF(T)

0.90

1.00 0.970 1.030 1000 1100 1050 1200

1.10 1.070 1.130 900 1000 950 1100

1.20 1.170 1.230 800 900 850 1000

1.30 1.270 1.330 700 800 750 900

1.40 1.370 1.430 600 700 650 800

1.50 1.470 1.530 500 600 550 700

1.60 1.568 1.632 400 500 500 600

1.70 1.666 1.734 300 400 400 500

1.80 1.764 1.836 200 300 300 400

1.90 1.862 1.938 120 150 280 380

2.00 1.960 2.040 80 120 240 350

2.10 2.058 2.142 80 120 240 330

2.20 2.156 2.244 80 120 240 330

2.30 2.254 2.346 80 120 240 310

2.40 2.352 2.448 80 120 240 310

2.50 2.450 2.550 70 100 220 290

2.60 2.548 2.652 70 100 220 290

2.70 2.646 2.754 70 100 220 290

2.80 2.744 2.856 70 100 220 270

2.90 2.842 2.958 70 100 220 270

3.00 2.940 3.060 60 90 200 270

3.10 3.038 3.162 60 90 200 250

3.20 3.136 3.264 60 90 200 250

3.30 3.234 3.366 60 90 200 250

3.40 3.332 3.468 60 90 200 250

3.50 3.430 3.570 60 90 200 250

3.60 3.528 3.672 60 90 200 250

3.70 3.626 3.774 60 90 200 250

3.80 3.724 3.876 60 90 200 250

3.90 3.822 3.978 60 90 200 250

4.00 3.920 4.080 60 80 180 230

4.10 4.018 4.182 60 80 180 230

4.20 4.116 4.284 60 80 180 230

4.30 4.214 4.386 60 80 180 230

4.40 4.312 4.488 60 80 180 230

4.50 4.410 4.590 60 80 180 230

4.60 4.508 4.692 60 80 180 230

4.70 4.606 4.794 60 80 180 230

4.80 4.704 4.896 60 80 180 230

4.90 4.802 4.998 60 80 180 230

5.00 4.900 5.100 50 70 160 210

5.10 4.998 5.202 50 70 160 210

5.20 5.096 5.304

5.30 5.194 5.406

5.40 5.292 5.508

5.50 5.390 5.610

OUTPUT VOLTAGE

DETECT VOLTAGE

(V)

V

/ V

ROUT(E)

MIN. MAX. TYP. MAX. TYP. MAX.

0.870 0.930 1050 1100 1150 1200

Vdif1 Vdif1 Vdif2 Vdif2

DF(E)

DROPOUT VOLTAGE 1 (mV)

(I

=30mA)

OUT

Ta =2 5 ℃ Ta =2 5 ℃

DROPOUT VOLTAGE 2 (mV)

(I

=100mA)

OUT

6/52

X

■ELECTRICAL CHARACTERISTICS (Continued)

CM524

Series

●XCM524xA 2ch (DC/DC Block) V

DCOUT

=1.8V, f

=1.2MHz, Ta=25℃

OSC

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage V

Operating Voltage Range V

Maximum Output Current I

UVLO Voltage V

DCOUT

2.7 - 6.0 V

IN2

OUT2MAX

UVLO

Supply Current IDD V

Stand-by Current I

Oscillation Frequency f

PFM Switching Current I

PFM Duty Limit DTY

Maximum Duty Cycle D

Minimum Duty Cycle D

Efficiency

(*2)

EFFI

Lx SW "H" ON Resistance 1 R

Lx SW "H" ON Resistance 2 R

Lx SW "L" ON Resistance 1 R

Lx SW "L" ON Resistance 2 R

Lx SW "H" Leak Current

Lx SW "L" Leak Current

Current Limit

(*5)

I

(*5)

I

(*9)

I

Output Voltage

Temperature

Characteristics

EN "H" Voltage V

EN "L" Voltage V

EN "H" Current I

EN "L" Current I

V

STB

OSC

PFM

LIMIT_PFM

MAX

V

MIN

LXH1

LXH2

LXL1

LXL2

LEAKH

LEAKL

V

LIM

△

V

DCOUT

(V

･△T

DCOUT

ENH

ENL

V

ENH

V

ENL

V

/

opr)

Soft Start Time tSS

Latch Time t

Short Protection

Threshold Voltage

V

LAT

SHORT

Test conditions: Unless otherwise stated, V

When connected to external components, V

V Voltage which Lx pin holding “L” level

=5.0V,I

IN2=VEN2

IN2=VDCOUT(T)

=5.0V,V

V

，

EN2=VIN2

IN2=VEN2

IN2

OUT2

+2.0V,V

=0V,

DCOUT

DCOUT=VDCOUT(T)

=0V,V

EN2

=30mA

(*8)

=1.0V

EN2

×1.1V

DCOUT=VDCOUT(T)

(*1, *10)

×1.1V - 0 1.0 μA

When connected to external components, V

IN2=VDCOUT(T)

When connected to external components, V

IN2=VDCOUT(T)

V

EN2=VIN2

IN2=VEN2

When connected to external components, V

EN2=VIN2＝VDCOUT(T)

IN2=VEN2

IN2=VDCOUT

IN2=VEN2

I

=30mA

OUT2

-40℃≦Topr≦85℃

V

DCOUT

Voltage changes Lx to “H” level V

DCOUT

Voltage changes Lx to “L” level

IN2=VEN2

=5.0V,V

IN2

+2.0V,V

=(C-1) I

=5.0V,V

=3.6V,V

=5.0V

=3.6V

=5.0V,V

=1.0V, I

EN2

, I

EN2=VIN2

(*11)

=1mA

OUT2

DCOUT=VDCOUT(T)

(*7)

+1.2V

DCOUT

(*4)

- 0.45 0.66 Ω

(*4)

- 0.52 0.77 Ω

EN2

DCOUT=VDCOUT(T)

, I

=0V,ILX=100mA

=0V,L

=0V - 0.01 1.0 μA

X

=0V,L

=5.0V - 0.01 1.0 μA

X

=0V, Applied voltage to V

=5.0V,V

EN2

=0V - 0.1 - 0.1 μA

DCOUT

=0V,V

=0V - 0.1 - 0.1 μA

DCOUT

=100mA

OUT1

(*11)

=1mA

OUT2

200 %

×0.9V 100 - - %

×1.1V - - 0 %

=100mA

OUT2

(*3)

- 0.35 0.55 Ω

(*3)

- 0.42 0.67 Ω

×0.9V 900 1050 1350 mA

EN2,

(*10)

EN2 (*10)

When connected to external components, V

=0V→V

EN2

V

IN2=VEN2

=5.0V, V Short Lx at 1Ω resistance Sweeping

V

IN2,IOUT1

, V

DCOUT

=1mA

DCOUT

IN2=VEN2

=0.8×V

(*6)

=5.0V,

DCOUT(T)

Short Lx at 1Ω resistance, DCOUT voltage which Lx becomes “ Lx=L ” within 1ms

=5.0V V

IN2

DCOUT(T)

= Setting voltage

(XCM524AA) - 22 50

(XCM524BA)

1.764 1.800 1.836 V ⑦

600 - - mA

1.00 1.40 1.78 V

- 15 33

1020 1200 1380 kHz

120 160 200 mA

- 92 - %

- ±100 - ppm/℃

0.65 - 6.0 V

V

- 0.25 V

SS

0.5 1.0 2.5 ms

1.0 - 20.0 ms

0.675 0.900 1.125 V

NOTE: *1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) /( input voltage×input current) }×100 *3: ON resistance (Ω)= (V

- Lx pin measurement voltage) /100mA

IN2

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6:

Time until it short-circuits DCOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.

*7: V

DCOUT(T)

+1.2V<2.7V, V

=2.7V.

IN2

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V

*11: XCM524A series exclude I

- 1.2V, "L"＝+ 0.1V 〜 - 0.1V

IN2〜VIN2

PFM

and DTY

because those are only for the PFM control’s functions.

LIMIT_PFM

* The electrical characteristics above are when the other channel is in stop.

μA

CIRCUIT

⑦ ⑦

⑨

⑧

⑧ ⑦

⑦ ⑦

⑨ ⑨

⑦ ⑩

⑩

−

− ⑪ ⑪ ⑫

⑦

⑨

⑨ ⑪

⑪ ⑦

⑬

7/52

XCM524 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM524xB 2ch (DC/DC BLOCK) V

DCOUT

=1.8V, f

=3.0MHz, Ta=25℃

OSC

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage V

Operating Voltage Range V

Maximum Output Current I

UVLO Voltage V

DCOUT

2.7 - 6.0 V

IN2

OUT2MAX

UVLO

Supply Current IDD V

Stand-by Current I

Oscillation Frequency f

PFM Switching Current I

PFM Duty Limit DTY

Maximum Duty Cycle D

Minimum Duty Cycle D

Efficiency

(*2)

EFFI

Lx SW "H" ON Resistance 1 R

Lx SW "H" ON Resistance 2 R

Lx SW "L" ON Resistance 1 R

Lx SW "L" ON Resistance 2 R

Lx SW "H" Leak Current

Lx SW "L" Leak Current

Current Limit

(*5)

I

(*5)

I

(*9)

I

Output Voltage

Temperature Characteristics

EN "H" Voltage V

EN "L" Voltage V

EN "H" Current I

EN "L" Current I

(V

△

DCOUT

LEAKH

LEAKL

V

STB

OSC

PFM

LIMIT_PFM

MAX

MIN

LXH1

LXH2

LXL1

LXL2

LIM

DCOUT

・△

ENH

ENL

ENH

ENL

V

/

topr)

V

Soft Start Time tSS

Latch Time t

Short Protection

Threshold Voltage

V

SHORT

LAT

Test conditions: Unless otherwise stated, V

When connected to external components, V

V

IN2=VEN2

= V

IN2

EN2=VIN2

=5.0V,I

DCOUT(T)

V

DCOUT

，

OUT2

+2.0V,V

=0V,

=30mA

=1.0V

EN1

(*8)

Voltage which Lx pin holding “L” level

IN2=VEN2

=5.0V,V

IN2

=5.0V,V

EN2

DCOUT=VDCOUT(T)

=0V,V

DCOUT=VDCOUT(T)

×1.1V

×1.1V - 0 1.0 μA

When connected to external components, V

IN2=VDCOUT(T)

+2.0V,V

EN2

=1.0V, I

OUT2

=100mA

When connected to external components, V

IN2=VDCOUT(T)

V

EN2=VIN2

IN2=VEN2

When connected to external components, V

EN2=VIN2＝VDCOUT(T)

IN2=VEN2

IN2=VEN1

IN2=VDCOUT

IN2=VEN2

I

=30mA

OUT2

-40℃≦Topr≦85℃

V

DCOUT

Voltage changes Lx to “H” level V

DCOUT

Voltage changes Lx to “L” level

IN2=VEN2

=5.0V, V

IN2

+2.0V,V

=(C-1) I

=5.0V,V

=3.6V,V

=5.0V

=3.6V

=5.0V,V

OUT2

DCOUT=VDCOUT(T)

+1.2V

DCOUT

(*4)

- 0.45 0.66 Ω

(*4)

- 0.52 0.77 Ω

EN2

DCOUT=VDCOUT(T)

, I

EN2=VIN2

(*11)

=1mA

(*7)

, I

=0V,ILX=100mA

=0V,L

=0V - 0.01 1.0 μA

X

=0V,L

=5.0V - 0.01 1.0 μA

X

=0V, Applied voltage to V

=5.0V, V

EN2

=0V - 0.1 - 0.1 μA

DCOUT

=0V, V

=0V - 0.1 - 0.1 μA

DCOUT

=1mA

OUT2

200 300 %

×0.9V 100 - - %

×1.1V - - 0 %

=100mA

OUT2

×0.9V 900 1050 1350 mA

,

EN2

(*10)

,

EN2

(*10)

When connected to external components, V

=0V→V

EN2

V

IN2=VEN2

=5.0V,V Short Lx at 1Ω resistance Sweeping V

IN2,IOUT2

DCOUT

=1mA

DCOUT

, V

IN2=VEN2

=0.8×V

(*6)

=5.0V,

DCOUT(T)

Short Lx at 1Ω resistance, DCOUT voltage which Lx becomes “ Lx=L ” within 1ms

=5.0V V

IN2

DCOUT(T)

= Setting voltage

(*1, *10)

(XCM524AB) - 46 65

(XCM524BB)

(*11)

(*3)

- 0.35 0.55 Ω

(*3)

- 0.42 0.67 Ω

1.764 1.800 1.836 V ⑦

600 - - mA

1.00 1.40 1.78 V

- 21 35

2550 3000 3450 kHz

170 220 270 mA

- 86 - %

- ±100 - ppm/℃

0.65 - 6.0 V

V

- 0.25 V

SS

0.5 0.9 2.5 ms

1.0 - 20.0 ms

0.675 0.900 1.125 V

NOTE: *1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) /( input voltage×input current) }×100 *3: ON resistance (Ω)= (V

- Lx pin measurement voltage) /100mA

IN2

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6:

Time until it short-circuits DCOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.

*7: V

DCOUT(T)

+1.2V<2.7V, V

=2.7V.

IN2

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V *11: XCM524A series exclude I

- 1.2V, "L"＝+ 0.1V 〜 - 0.1V

IN2〜VIN2

and DTY

PFM

because those are only for the PFM control’s functions.

LIMIT_PFM

* The electrical characteristics above are when the other channel is in stop.

CIRCUIT

⑦ ⑦

⑨

μA ⑧

⑧ ⑦

⑦ ⑦

⑧ ⑧

⑦ ⑩

⑩

−

− ⑪ ⑪ ⑫

⑦

⑨

⑨ ⑪

⑪ ⑦

⑬

8/52

X

■ELECTRICAL CHARACTERISTICS (Continued)

CM524

Series

●XCM524xC 2ch (DC/DC BLOCK) V

DCOUT

=1.8V, f

=1.2MHz, Ta=25℃

OSC

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage V

Operating Voltage Range V

Maximum Output Current I

UVLO Voltage V

DCOUT

2.7 - 6.0 V

IN2

OUT2MAX

UVLO

Supply Current IDD

Stand-by Current I

Oscillation Frequency f

PFM Switching Current I

PFM Duty Limit DTY

Maximum Duty Cycle D

Minimum Duty Cycle D

V

STB

OSC

PFM

LIMIT_PFM

V

MAX

V

MIN

Efficiency EFFI

Lx SW "H" ON Resistance 1 R

Lx SW "H" ON Resistance 2 R

Lx SW "L" ON Resistance 1 R

Lx SW "L" ON Resistance 2 R

Lx SW "H" Leak Current

Current Limit

(*5)

I

(*9)

I

Output Voltage

Temperature Characteristics

EN "H" Voltage V

EN "L" Voltage V

EN "H" Current I

EN "L" Current I

LXH1

LXH2

LXL1

LXL2

LEAKH

LIM

△

V

DCOUT

(V

・△

DCOUT

ENH

ENL

ENH

ENL

V

/

topr)

V

Soft Start Time tSS

Latch Time t

Short Protection

Threshold Voltage

CL Discharge R

V

SHORT

LAT

DCHG

V

Test conditions: Unless otherwise stated, V

When connected to external components, V

V

=5.0V,I

IN2=VEN2

IN2=VDCOUT(T)

EN2=VIN2

V

，

OUT1

+2.0V,V

DCOUT

=30mA

EN2

=0V,

=1.0V

(*8)

Voltage which Lx pin holding “L” level

V

IN2=VEN2

=5.0V,V

IN2

=5.0V,V

EN2

DCOUT=VDCOUT

=0V,V

×1.1V

(T)

DCOUT=VDCOUT(T)

×1.1V - 0 1.0 μA

When connected to external components, V

IN2=VDCOUT(T)

+2.0V,V

EN2

=1.0V, I

OUT2

=100mA

When connected to external components, V

IN2=VDCOUT(T)

V

EN2=VIN2

IN2=VEN2

When connected to external components, V

EN2=VIN2＝VDCOUT(T)

IN2=VEN2

IN1=VDCOUT

IN2=VEN2

I

=30mA

OUT2

-40℃≦Topr≦85℃

V

DCOUT

Voltage changes Lx to “H” level V

DCOUT

Voltage changes Lx to “L” level

IN2=VEN2

=5.0V,V

IN2

+2.0V,V

=(C-1)I

=5.0V, V

=5.0V,V

=3.6V,V

=5.0V

=3.6V

=5.0V,V

=1mA

OUT2

DCOUT=VDCOUT(T)

+1.2V

DCOUT

(*4)

- 0.45 0.66 Ω

(*4)

- 0.52 0.77 Ω

EN1

DCOUT=VDCOUT(T)

, I

EN2=VIN2

(*11)

(*7)

, I

=0V,ILX=100mA

=0V,L

=0V - 0.01 1.0 μA

X

=0V, Applied voltage to V

=5.0V,V

EN2

=0V - 0.1 - 0.1 μA

DCOUT

=0V,V

=0V - 0.1 - 0.1 μA

DCOUT

=1mA

OUT2

- 200 %

×0.9V 100 - - %

×1.1V - - 0 %

=100mA

OUT2

×0.9V 900 1050 1350 mA

EN2,

(*10)

EN2,

(*10)

When connected to external components, V

=0V→V

EN2

V

IN2=VEN2

Short Lx at 1Ω resistance Sweeping V

, I

IN2

=5.0V,V

DCOUT

OUT2

DCOUT

, V

=1mA

=0.8×V

IN2=VEN2

DCOUT(T)

(*6)

=5.0V,

Short Lx at 1Ω resistance, DCOUT voltage which Lx becomes “ Lx=L ” within 1ms

=5.0V,LX=5.0V,V

IN2

=5.0V V

IN2

DCOUT(T)

=0V,V

EN2

DCOUT

= Setting voltage

=open

(*1, *10)

(XCM524AC) - 22 50

(XCM524BC) - 15 33

(*11)

(*3)

- 0.35 0.55 Ω

(*3)

- 0.42 0.67 Ω

1.764 1.800 1.836 V

600 - - mA

1.00 1.40 1.78 V

1020 1200 1380 kHz

120 160 200 mA

- 92 - %

- ±100 - ppm/℃

0.65 - 6.0 V

V

SS

- 0.25 V

- 0.25 0.40 ms

1.0 - 20 ms

0.675 0.900 1.150 V

200 300 450 Ω

NOTE: *1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) /( input voltage×input current) }×100 *3: ON resistance (Ω)= (V

- Lx pin measurement voltage) /100mA

IN2

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6:

Time until it short-circuits DCOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.

*7: V

DCOUT(T)

+1.2V<2.7V, V

=2.7V.

IN2

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V

*11: XCM524A series exclude I

- 1.2V, "L"＝+ 0.1V 〜 - 0.1V

IN2〜VIN2

PFM

and DTY

because those are only for the PFM control’s functions.

LIMIT_PFM

* The electrical characteristics above are when the other channel is in stop.

μA

CIRCUIT

⑦ ⑦ ⑦

⑨

⑧

⑧ ⑦

⑦ ⑦

⑨ ⑨

⑦ ⑩

⑩

−

− ⑮ ⑫

⑦

⑨

⑨ ⑪

⑪ ⑦

⑬

⑭

9/52

XCM524 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM524xD 2ch (DC/DC BLOCK) V

DCOUT

=1.8V, f

=3.0MHz, Ta=25℃

OSC

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage V

Operating Voltage Range V

Maximum Output Current I

UVLO Voltage V

DCOUT

2.7 - 6.0 V

IN2

OUT2MAX

UVLO

Supply Current IDD

Stand-by Current I

Oscillation Frequency f

PFM Switching Current I

PFM Duty Limit DTY

Maximum Duty Cycle D

Minimum Duty Cycle D

V

STB

OSC

PFM

LIMIT_PFM

V

MAX

V

MIN

Efficiency EFFI

Lx SW "H" ON Resistance 1 R

Lx SW "H" ON Resistance 2 R

Lx SW "L" ON Resistance 1 R

Lx SW "L" ON Resistance 2 R

Lx SW "H" Leak Current

Current Limit

(*5)

ILeakH V

(*9)

I

Output Voltage

Temperature Characteristics

EN "H" Voltage V

EN "L" Voltage V

EN "H" Current I

EN "L" Current I

LXH1

LXH2

LXL1

LXL2

V

LIM

△

V

DCOUT

(V

・△topr)

DCOUT

ENH

ENL

V

ENH

V

ENL

V

/

Soft Start Time tSS

Latch Time t

Short Protection

Threshold Voltage

CL Discharge R

V

LAT

SHORT

DCHG

V

Test conditions: Unless otherwise stated, V

When connected to external components, V

V Voltage which Lx pin holding “L” level

V

=5.0V,I

IN2=VEN2

IN2=VDCOUT(T)

=5.0V,V

V

，

EN2=VIN2

IN2=VEN2

IN2

OUT2

+2.0V,V

=0V,

DCOUT

DCOUT=VDCOUT

=0V,V

EN2

=30mA

(*8)

=1.0V

EN2

×1.1V

(T)

DCOUT=VDCOUT(T)

(*1, *10)

(XCM524AD) - 46 65

(XCM524BD) - 21 35

×1.1V - 0 1.0 μA

When connected to external components, V

IN2=VDCOUT(T)

When connected to external components, V

IN2=VDCOUT(T)

V

EN2=VIN2

IN2=VEN2

When connected to external components, V

EN2=VIN2＝VDCOUT(T)

IN2=VEN2

IN2=VDCOUT

IN2=VEN2

I

=30mA

OUT2

-40℃≦Topr≦85℃

V

DCOUT

Voltage changes Lx to “H” level V

DCOUT

Voltage changes Lx to “L” level

IN2=VEN2

=5.0V,V

IN2

+2.0V,V

=(C-1)I

=5.0V, V

=5.0V,V

=3.6V,V

=5.0V

=3.6V

=5.0V,V

=1.0V, I

EN2

, I

EN2=VIN2

(*11)

=1mA

OUT2

DCOUT=VDCOUT(T)

(*7)

+1.2V

DCOUT

(*4)

- 0.45 0.66 Ω

(*4)

- 0.52 0.77 Ω

EN2

DCOUT=VDCOUT(T)

, I

=0V,ILX=100mA

=0V,L

=0V - 0.01 1.0 μA

X

=0V, Applied voltage to V

=5.0V,V

EN2

=0V - 0.1 - 0.1 μA

DCOUT

=0V,V

=0V - 0.1 - 0.1 μA

DCOUT

=100mA

OUT2

(*11)

=1mA

OUT2

- 200 300 %

×0.9V 100 - - %

×1.1V - - 0 %

=100mA

OUT2

(*3)

- 0.35 0.55 Ω

(*3)

- 0.42 0.67 Ω

×0.9V 900 1050 1350 mA

EN2,

(*10)

EN2, (*10)

When connected to external components, V

=0V→V

EN2

V

IN2=VEN2

Short Lx at 1Ω resistance Sweeping V

, I

IN2

=5.0V,V

DCOUT

OUT2

DCOUT

, V

=1mA

=0.8×V

IN2=VEN2

DCOUT(T)

(*6)

=5.0V,

Short Lx at 1Ω resistance, DCOUT voltage which Lx becomes “ Lx=L ” within 1ms

=5.0V,LX=5.0V,V

IN2

=5.0V V

IN2

DCOUT(T)

=0V,V

EN2

DCOUT

= Setting voltage

=open

1.764 1.800 1.836 V

600 - - mA

1.00 1.40 1.78 V

2550 3000 3450 kHz

170 220 270 mA

- 86 - %

- ±100 - ppm/℃

0.65 - 6.0 V

V

- 0.25 V

SS

- 0.32 0.50 ms

1.0 - 20 ms

0.675 0.900 1.150 V

200 300 450 Ω

NOTE: *1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) /( input voltage×input current) }×100 *3: ON resistance (Ω)= (V

- Lx pin measurement voltage) /100mA

IN2

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6:

Time until it short-circuits DCOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.

*7: V

DCOUT(T)

+1.2V<2.7V, V

=2.7V.

IN2

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝V

*11: XCM524A series exclude I

- 1.2V, "L"＝+ 0.1V 〜 - 0.1V

IN2〜VIN2

PFM

and DTY

because those are only for the PFM control’s functions.

LIMIT_PFM

* The electrical characteristics above are when the other channel is in stop.

CIRCUIT

⑦ ⑦ ⑦

⑨

μA ⑧

⑧ ⑦

⑦ ⑦

⑨ ⑨

⑦ ⑩

⑩

−

− ⑮ ⑫

⑦

⑨

⑨ ⑪

⑪ ⑦

⑬

⑭

10/52

X

■ELECTRICAL CHARACTERISTICS (Continued)

●PFM Switching Current (I

1.2MHz (mA)

SETTING VOLTAGE MIN. TYP. MAX.

V

≦1.2Ｖ

DCOUT(T)

1.2V＜V

1.8V≦V

DCOUT(T)

≦1.75Ｖ

3.0MHz (mA)

SETTING VOLTAGE MIN. TYP. MAX.

V

≦1.2Ｖ

DCOUT(T)

1.2V＜V

1.8V≦V

DCOUT(T)

≦1.75Ｖ

●Measuring Maximum I

f

1.2MHz 3.0MHz

OSC

(C-1) V

DCOUT(T)

+0.5V V

Minimum operating voltage is 2.7V

Although when V

DCOUT(T)

=1.2V, f

●Soft-Start Time Chart (XCM524xC/ XCM524xD Series Only)

 PRODUCT SERIES f

XCM524AC

XCM524BC

XCM524xD

) by Oscillation Frequency and Output Voltage

PFM

140 180 240

130 170 220

120 160 200

190 260 350

180 240 300

170 220 270

Limit, V

PFM

DCOUT(T)

OSC

Volta ge

IN2

+1.0V

=1.2MHz, (C-1)=1.7V the (C-1) becomes 2.7V because of the minimum operating voltage 2.7V.

OUTPUT VOLTAGE MIN. TYP. MAX.

OSC

1.2MHz

3.0MHz

0.8V≦V

1.5V≦V

1.8V≦V

2.5V≦V

0.8V≦V

2.5V≦V

0.8V≦V

1.8V≦V

DCOUT(T)

<1.5V

<1.8V

<2.5V

≦4.0V

<2.5V

≦4.0V

<1.8V

≦4.0V

-

250μs 400μs 320μs 500μs 250μs 400μs 320μs 500μs 250μs 400μs 320μs 500μs 250μs 400μs 320μs 500μs

CM524

Series

■TYPICAL APPLICATION CIRCUIT

Rpull-up

V

IN CIN2

VROUTVDOUT

CL1

CIN1

EN2

VDCOUT

NC

VIN1

EN2

AGND

12

11

103

9

8

7

CL2

1

VDOUT VROUT

2

VSS

Cd

4

5

6

Cd

VIN2

PGND

Lx

DCOUT

L

●DC/DC BLOCK f

C

: 1μF (Ceramic)

IN1

C

L1

: 1μF (Ceramic)

=3.0MHz

OSC

L : 1.5μH (NR3015 TAIIYO YUDEN)

: 4.7μF (Ceramic)

C

IN2

: 10μF (Ceramic)

C

L2

●DC/DC BLOCK f

C

: 1μF (Ceramic)

IN1

: 1μF (Ceramic)

C

L1

=1.2MHz

OSC

L : 4.7μH (NR4018 TAIIYO YUDEN)

: 4.7μF (Ceramic)

C

IN2

C

L2

: 10μF (Ceramic)

11/52

■

XCM524 Series

OPERATIONAL EXPLANATION

●Voltage Regulator BLOCK

The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The P-channel MOSFET which is connected to the V at the V

●Detector Function with the XC524 Series

The series' detector function monitors the voltage divided by resistors R3 & R4, which are connected to the VR V

IN1 pin or the VSEN pin, as well as monitoring the voltage of the internal reference voltage source via the comparator. The

VDSEN pin has options. A 'High' or 'Low' signal level can be output from the VD below the detect voltage. The VD output logic has options. As VD

of about 220kΩis needed to achieve a voltage output.

Because of hysteresis at the detector function, output at the VD above the release voltage (105% of the detect voltage). By connecting the Cd pin to a capacitor, the XCM524 series can apply a delay time to VDOUT voltage when releasing voltage.

The delay time can be calculated from the internal resistance, Rdelay (500kΩ fixed) and the value of Cd as per the following

equation.

pin is controlled & stabilized by a system of negative feedback.

ROUT

Delay Time = Cd x Rdelay x 0.7 …(1)

Delay Time

Rdelay standard : 300 ~ 700kΩ TYP : 500kΩ

Cd DELAY TIME (TYP.)

0.01μF

0.022μF

0.047μF

0.1μF

0.22μF

0.47μF 1μF

<Low ESR Capacitor> With the XCM524 series, a stable output voltage is achievable even if used with low ESR capacitors, as a phase

compensation circuit is built-in. The output capacitor (CL1) should be connected as close to V stable phase compensation. Also, please connect an input capacitor (C

Output Capacitor Chart

* The release delay time values above are calculated by using the formula (1).

*1: The release delay time is influenced by the delay capacitance Cd.

V

0.9 ~1.2V 1.3 ~ 1.7V 1.8 ~ 5.1V

ROUT

pin is then driven by the subsequent output signal. The output voltage

ROUT

OUT pin or the

OUT pin when the VD pin voltage level goes

OUT is an open-drain N-channel output, a pull-up resistor

OUT pin will invert when the detect voltage level increases

DELAY TIME (MIN.～MAX.)

3.5 ms 2.1 ~ 4.9 ms

7.7 ms 4.62 ~ 10.8 ms

16.5 ms 9.87 ~ 23.0 ms

35 ms 21.0 ~ 49.0 ms

77 ms 46.2 ~ 108.0 ms

165 ms 98.7 ~ 230.0 ms

350 ms 210.0 ~ 490.0 ms

pin and VSS pin to obtain

ROUT

IN1) of 1.0μF between the VIN1 pin and the VSS pin.

CL1

<Current Limit, Short-Circuit Protection> The XCM524 series’ fold-back circuit operates as an output current limiter and a short protection of the output pin. When the

load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. When the output pin is shorted to the V



SS

≧4.7μF ≧2.2μF ≧1.0μF

level, current flows about 50mA.

12/52

X

CM524

Series

■OPERATIONAL EXPLANATION (Continued)

●DC/DC BLOCK

The DC/DC block of the XCM524 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase compensation circuit, output voltage adjustment resistors, P-channel MOSFET driver transistor, N-channel MOSFET switch transistor for the synchronous switch, current limiter circuit, UVLO circuit and others. (See the block diagram



above.) The series ICs compare, using the error amplifier, the voltage of the internal voltage reference source with the feedback voltage from the DCOUT pin through split resistors, R1 and R2. Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time during PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is continuously performed to ensure stable output voltage. The current feedback circuit monitors the P-channel MOS driver transistor current for each switching operation, and modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback loop even when a low ESR capacitor such as a ceramic capacitor is used ensuring stable output voltage.

<Reference Voltage Source> The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.

<Ramp Wave Circuit> The ramp wave circuit determines switching frequency. The frequency is fixed internally and can be selected from 1.2MHz or

3.0MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits.

<Error Amplifier> The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback voltage divided by the internal split resistors, R1 and R2. When a voltage is lower than the reference voltage is fed back, the output voltage of the error amplifier increases. The gain and frequency characteristics of the error amplifier output are fixed internally to deliver an optimized signal to the mixer.

<Current Limit> The current limiter circuit of the XCM524series monitors the current flowing through the P-channel MOS driver transistor connected to the Lx pin, and features a combination of the current limit mode and the operation suspension mode.

①When the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the Lx pin

at any given timing.

②When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state. ③At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over

current state.

④When the over current state is eliminated, the IC resumes its normal operation. The IC waits for the over current state to end by repeating the steps ①through ③. If an over current state continues for a

few ms and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the P-channel driver transistor, and goes into operation suspension mode. Once the IC is in suspension mode, operations can be resumed by either turning the IC off via the CE/MODE pin, or by restoring power to the V not mean a complete shutdown, but a state in which pulse output is suspended; therefore, the internal circuitry remains in operation. The current limit of the XCM524 series can be set at 1050mA at typical. Besides, care must be taken when laying out the PC Board, in order to prevent miss-operation of the current limit mode. Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid the effect of noise, the board should be laid out so that input capacitors are placed as close to the IC as possible.

Limit＜#ms

Limit<数ms



Limit＞#ms

Limit>数ms

ILx

V

DCOUT

Lx

VEN2

VIN2



pin. The suspension mode does

IN2

Current Limit LEVEL

0mA

VSS

Restart

13/52

XCM524 Series

■OPERATIONAL EXPLANATION (Continued)



<Short-Circuit Protection>

The short-circuit protection circuit monitors the internal R1 and R2 divider voltage from the DCOUT pin. In case where output is accidentally shorted to the Ground and when the FB point voltage decreases less than half of the reference voltage (Vref) and a current more than the I turn off and to latch the P-channel MOS driver transistor. In latch state, the operation can be resumed by either turning the IC off and on via the EN2 pin, or by restoring power supply to the V

When sharp load transient happens, a voltage drop at the DCOUT pin is propagated to FB point through C circuit protection may operate in the voltage higher than 1/2 V



When the V

IN2 pin voltage becomes 1.4V or lower, the P-channel output driver transistor is forced OFF to prevent false pulse

output caused by unstable operation of the internal circuitry. When the V operation takes place. By releasing the UVLO function, the IC performs the soft start function to initiate output startup operation. The soft start function operates even when the VIN pin voltage falls momentarily below the UVLO operating voltage. The UVLO circuit does not cause a complete shutdown of the IC, but causes pulse output to be suspended; therefore, the internal circuitry remains in operation.

<PFM Switch Current> In the PFM control operation, until coil current reaches to a specified level (I case, on-time (t

t

= L×I

ON

PFM

) that the P-ch MOSFET is kept on can be given by the following formula.

ON

/(V

IN2-VDCOUT

) →I

PFM

①

<PFM duty Limit> In the PFM control operation, the PFM duty limit (DTY duty increases (e.g. the condition that the step-down ratio is small), it’s possible for P-ch MOSFET to be turned off even when coil current doesn’t reach to I

PFM

. →I

                                         

PFM

①

14/52

flows to the driver transistor, the short-circuit protection quickly operates to

LIM

pin.

IN2

voltage.

OUT

pin voltage becomes 1.8V or higher, switching

IN2

) , the IC keeps the P-ch MOSFET on. In this

PFM

) is set to 200% (TYP.). Therefore, under the condition that the

PFM Duty Limit

I

② I

PFM

LIMIT_PFM

②

, as a result, short

FB

X

CM524

Series

■OPERATIONAL EXPLANATION (Continued)

High Speed Discharge>

<C

L

XCM524 series can quickly discharge the electric charge at the output capacitor (CL2) when a low signal to the CE pin which enables a whole IC circuit put into OFF state, is inputted via the N-channel MOS switch located between the L pin. When the IC is disabled, electric charge at the output capacitor (C malfunction. Discharge time of the output capacitor (C

) is set by the CL auto-discharge resistance (R) and the output capacitor

L

) is quickly discharged so that it may avoid application

L

(CL). By setting time constant of a CL auto-discharge resistance value [R] and an output capacitor value (CL2) as

τ(τ=C x R), discharge time of the output voltage after discharge via the N channel transistor is calculated by the following

formula.

-t /

V = V

DCOUT(T)

τ

×e

or t = τLn ( V

DCOUT(T)

/V)

V : Output voltage after discharge, V

: Output voltage after discharge

DCOUT(T)

t: Discharge time

τ: C×R C = Capacitance of Output capacitor（C

auto-discharge resistance

R = C

L

）

L2

pin and the VSS

X

100

） e u

l a

V e

v

i

t a

l e

R （

e g a

t

l o

V t

u p

t u

O

90

e

80

u

l a

V

70

e g

60

a

t

l o

50

V g

n

i

40

t

t e

30

S =

20

0 0 1

10

0

0 102030405060708090100

CL=10uF

CL=20uF

CL=50uF

■NOTE ON USE

When the DC/DC converter and the VR are connected as V

DCOUT=VIN1

1. When larger value is used in DC/DC output capacitor CL2, the larger value is also used in C noted that when C

capacitance of the VR is getting large, an inrush current increases at VR start-up, DC/DC short circuit

L2

protection starts to operate, as a result, the IC may happen to stop.

DCOUT(1V/div)

IIN2(500mA/div)

VROUT(1V/div)

short-circuit protection to start

短絡保護動作

EN2(5V/div)

50us/div

* VR inrush current I

start, as a result, the IC may happen to stop.

The left waver forms are taken at C

contrast to the recommended 1.0μF).

, the following points should be noted.

makes DC/DC short-circuit protection to

IN1

as in proportional. Please be

L1

=10μ, CL2=10μF(in

L1

15/52

XCM524 Series



■NOTE ON USE (Continued)

1. Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be exceeded.

2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. Especially, V

3. Please wire the input capacitor (C

Care shall be taken for capacitor selection to ensure stability of phase compensation from the point of ESR influence.

1. The XCM524 series is designed for use with ceramic output capacitors. If, however, the potential difference is too large between the input voltage and the output voltage, a ceramic capacitor may fail to absorb the resulting high switching energy and oscillation could occur on the output. If the input-output potential difference is large, connect an electrolytic capacitor in parallel to compensate for insufficient capacitance.

2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by

external component selection, such as the coil inductance, capacitance values, and board layout of external components. Once the design has been completed, verification with actual components should be done.

3. As a result of input-output voltage and load conditions, oscillation frequency goes to 1/2, 1/3, and continues, then a ripple

may increase.

4. When input-output voltage differential is large and light load conditions, a small duty cycle comes out. After that, 0%duty

cycle may continue in several periods.

5. When input-output voltage differential is small and heavy load conditions, a large duty cycle comes out and may

continues100% duty cycle in several periods.

6. With the IC, the peak current of the coil is controlled by the current limit circuit. Since the peak current increases when

dropout voltage or load current is high, current limit starts operation, and this can lead to instability. When peak current becomes high, please adjust the coil inductance value and fully check the circuit operation. In addition, please calculate the peak current according to the following formula:

Ipk =(V

L：Coil Inductance Value

f

7. When the peak current which exceeds limit current flows within the specified time, the built-in P-channel MOS driver transistor turns off. During the time until it detects limit current and before the P-channel built-in transistor can be turned off, the current for limit current flows; therefore, care must be taken when selecting the rating for the external components such as a coil.

8. Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid

the effect of noise, the board should be laid out so that input capacitors are placed as close to the IC as possible.

9. Use of the IC at voltages below the recommended voltage range may lead to instability.

10. This IC should be used within the stated absolute maximum ratings in order to prevent damage to the device.

11. When the IC is used in high temperature, output voltage may increase up to input voltage level at no load because of the

leak current of the P-channel MOS driver transistor.

IN2-VDCOUT

：Oscillation Frequency

OSC

and VSS wiring should be taken into consideration for reinforcement.

IN1

) and the output capacitor (CL1) as close to the IC as possible.

IN1

)×OnDuty/(2×L×f

OSC

) + I

OUT2

16/52

X

CM524

Series

■NOTE ON USE (Continued)

12. The current limit is set to 1350mA (MAX.)

In case that the current limit functions while the DCOUT pin is shorted to the GND pin, when P-channel MOSFET is ON,

the potential difference for input voltage will occur at both ends of a coil. For this, the time rate of coil current becomes large. By contrast, when N- channel MOSFET switch is ON, there is almost no potential difference at both ends of the coil since the DCOUT pin is shorted to the GND pin. Consequently, the time rate of coil current becomes quite small. According to the repetition of this operation, and the delay time of the circuit, coil current will be converged on a certain current value, exceeding the amount of current, which is supposed to be limited originally. Even in this case, however, after the over current state continues for several ms, the circuit will be latched. A coil should be used within the stated absolute maximum rating in order to prevent damage to the device.

①Current flows into P-channel MOS driver transistor to reach the current limit (I

②The current of I

OFF of P-channel MOS driver transistor.

③Because of no potential difference at both ends of the coil, the time rate of coil current becomes quite small. ④Lx oscillates very narrow pulses by the current limit for several ms. ⑤The circuit is latched, stopping its operation.

or more flows since the delay time of the circuit occurs during from the detection of the current limit to

LIM

at typical. However, the current of 1350mA or more may flow.

).

LIM

# ms



13. In order to stabilize V connected as close as possible to the V

14. High step-down ratio and very light load may lead an intermittent oscillation.

15. During PWM / PFM automatic switching mode, operating may become unstable at transition to continuous mode. Please verify with actual parts.

’s voltage level and oscillation frequency, we recommend that a by-pass capacitor (CIN2) be

IN1

IN2 & VSS pins.

 



17/52



XCM524 Series

■NOTE ON USE (Continued)

16. Please note the L value of the coil. The IC may enter unstable operation if the combination of ambient temperature, setting voltage, oscillation frequency, and L value are not adequate. 

The Range of L Value

17. Under input-output voltage differential is large, operating may become unstable at transition to continuous mode.

Please verify with actual parts.

●

f

V

OSC

3.0MHz

1.2MHz

*When a coil less value of 4.7μH is used at when a coil less value of 1.5μH is used at f

current more easily reach the current limit ILMI. In this

case, it may happen that the IC can not provide 600mA

output current.



0.8V≦V

V

DCOUT

2.5V＜V

L Value

DCOUT

≦4.0V 1.0μH〜2.2μH

DCOUT

≦2.5V 3.3μH〜6.8μH

4.7μH〜6.8μH

DCOUT

=3.0MHz, peak coil

OSC

●Instructions of pattern layouts

1. Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be

exceeded.

2. In order to stabilize V

C

) be connected as close as possible to the V

L2

IN1・VIN2

・DCOUT･V

3. Please mount each external component as close to the IC as possible.

4. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit

impedance.

5. V

（AGND・PGND・VSS）ground wiring is recommended to get large area. The IC may goes into unstable operation as

SS

a result of V

voltage level fluctuation during the switching.

SS

6. This series’ internal driver transistors bring on heat because of the output current (I

transistors.

●Recommended Pattern Layout

voltage level, we recommend that a by-pass capacitor (C

ROUT

IN1・VIN2

・DCOUT･V

and GND･V

ROUT

pins.

SS

) and ON resistance of driver

OUT

IN1・CIN2・CL1

・

Front Back

18/52

X

■

TEST CIRCUITS

Outpur Capacitor

V

ROUT

CL

CM524

Series

0.9 ~1.2V 1.3 ~ 1.7V 1.8V ~ 5.1V

≧4.7μF ≧2.2μF ≧1.0μF

19/52

XCM524 Series

■TEST CIRCUITS (Continued)

20/52

X

■

TYPICAL PERFORMANCE CHARACTERISTICS

CM524

Series

●1ch:VDR Block

（1）VR Output Voltage vs. VR Output Current

)

V

(

(V)

ROUT

Output Voltage VRO UT

Output Voltage: V

2.5

2.0

1.5

1.0

0.5

0.0

XC6405 Series (V R:1.8V) XC6405 Series (V R:1.8V)

V

=1.8V

ROUT

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

Topr= 25 Top r = - 40 Topr= 85

℃ ℃ ℃

0 100 200 300 400 500 600 700

Output Current IROUT(mA)

3.0

Output Current: I

XC6405 Series (V R:2.5V)

V

ROUT

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

ROUT

=2.5V

(mA)

VIN=3.8V,

V

=3.8V

IN1

V

=4.5V

VIN=4.5V,

IN1

V

=1.8V

ROUT

CIN=1 .0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

)

V

(

(V)

ROUT

2.5

2.0

1.5

1.0

0.5

Output Voltage VROUT

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

Output Current IROUT(mA )

3.0

Output Current: I

V

XC6405 Series ( VR:2.5V )

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic )

C

IN1

ROUT

=1.0μF(ceramic), CL1=1.0μF(ceramic)

ROUT

=2.5V

(mA)

VIN= 3.8V VIN= 2.1V VIN= 6.0V

2.5

)

V

(

(V)

ROUT

2.0

1.5

Topr= 25 Topr= - 40 Topr= 85

℃

1.0

Output Voltage VROUT

0.5

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

4.0

Output Current: I

Outp ut Current IROUT(mA)

XC6405 Series (V R:3.0V)

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

V

ROUT

=3.0V

3.5

)

V

3.0

(

(V)

ROUT

2.5

2.0

Topr= 25 Top r = - 40 Topr= 85

℃

1.5

1.0

Output Voltage VRO UT

0.5

Output Voltage: V

0.0

0 100 200 300 400 500 600 700

Output Current: I

Output Current IROUT(mA)

ROUT

(mA)

VIN=5.0V,

V

=5.0V

IN1

2.5

)

V

(

(V)

2.0

ROUT

1.5

VIN= 4.5V VIN= 2.8V VIN= 6.0V

1.0

Output Voltage VROUT

0.5

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

)

V

(

(V)

ROUT

4.0

3.5

3.0

2.5

Output Current: I

Output Current IROUT(mA )

XC6405 Series ( VR:3.0V )

V

ROUT

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

ROUT

=3.0V

(mA)

2.0

1.5

1.0

Output Voltage VROUT

0.5

Output Voltage: V

VIN= 5.0V VIN= 6.0V

0.0 0 100 200 300 400 500 600 700

Output Current IROUT(mA )

Output Current: I

ROUT

(mA)

21/52

■

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（1）VR Output Voltage vs. VR Output Current (Continued)

6.0

XC6405 Series ( VR:5.0V )

V

=5.0V

ROUT

VIN=6.0V,

V

=6.0V

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

6.0

C

V

XC6405 Series (VR:5.0V )

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

ROUT

=5.0V

5.0

)

V

(

(V)

ROUT

Output Voltage VROUT

4.0

3.0

2.0

1.0

Topr= 25 Topr= - 40 Topr= 85

℃ ℃ ℃

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

Output Current IROUT(mA)

)

V

(

(V)

ROUT

Output Current: I

XC6405 Series ( VR:0.9V )

CIN=1.0μF (ceramic), CL=4.7μF (cer a mic)

C

=1.0μF(ceramic), CL1=4.7μF(ceramic)

1.5

1.2

0.9

0.6

IN1

Top r = 2 5 Top r = - 4 0 Top r = 8 5

V

ROUT

=0.9V

℃

(mA)

VIN=2.9V,

V

=2.9V

)

5.0

V

(

(V)

4.0

ROUT

3.0

2.0

1.0

Output Voltage VRO UT

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

1.5

)

1.2

V

(

(V)

0.9

ROUT

0.6

VIN= 6.0V

Output Current IROUT (mA)

Output Current: I

XC6405 Series (V R:0.9V)

V

ROUT

CIN=1.0μF (ceramic), CL=4.7μF (cer a mic)

C

=1.0μF(ceramic), CL1=4.7μF(ceramic)

IN1

ROUT

=0.9V

(mA)

0.3

Output Voltage VRO UT

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

Output Current IROUT(mA)

Output Current: I

ROUT

(mA)

ROUT

VIN= 2.0V VIN= 2.9V VIN= 6.0V

(mA)

0.3

Output Voltage VRO UT

Output Voltage: V

0.0 0 100 200 300 400 500 600 700

Outp ut Current IROUT(mA)

Output Current: I

22/52

X

℃

■

℃

(

)

℃

(

)

℃

(

)

(

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（2）VR Output Voltage vs. Input Voltage

V

ROUT

=0.9V

Topr=25

Ta =2 5 ℃

IOUT =0mA

1mA

30mA

100mA

)

V

(

(V)

ROUT

1.00

CIN=1 .0μF (ceramic), CL=4.7μF (c er a mic )

=1.0μF(ceramic), CL1=4.7μF(ceramic)

C

IN1

)

V

(

(V)

ROUT

1.5

1.3

1.1

XC6405 Ser ie s (VR:0.9V) XC6405 Ser ie s (VR:0.9V)

CIN=1. 0μF (ceramic), CL=4.7μF (ceramic)

C

=1.0μF(ceramic), CL1=4.7μF(ceramic)

IN1

0.80

0.9

V

ROUT

=0.9V

Topr=25

IOUT =0mA

1mA

30mA

100mA

CM524

Series

Ta =2 5 ℃

0.7

Output Voltage VROUT

Output Voltage: V

0.5

0.5 1.0 1.5 2.0 2.5

2.0

)

1.8

V

(

Input Voltage VIN ( V)

Input Voltage: V

XC6405 Ser ie s (VR:1.8V )

V

ROUT

CIN=1 .0μF (c er a mic ) , CL=1. 0μF (cer a mic )

C

=1.0μF

IN1

ceramic), C

IN1

=1.8V

(V)

=1.0μF

L1

(V)

1.6

ROUT

IOUT =0mA

1.4

1.2

Output Voltage VROUT

Output Voltage: V

1.0

1.3 1.8 2.3 Input Voltage VIN ( V)

Input Voltage: V

(V)

IN1

Topr=25

Ta =2 5

ceramic

1mA

30mA

100mA

Output Voltage VROUT

Output Voltage: V

0.60

2.03.04.05.06.0

CIN=1 .0μF (c er a mic ) , CL=1. 0μF (cer a mic )

)

V

(

(V)

ROUT

1.90

1.85

1.80

1.75

Input Voltage VIN ( V)

Input Voltage: V

V

=1.0μF

IN1

ROUT

ceramic), C

XC6405 Ser ie s (VR:1.8V)

C

=1.8V

(V)

IN1

L1

Topr=25

=1.0μF

IOUT =0mA

Ta =2 5

ceramic

1mA

1.70

Output Voltage VROUT

30mA

100mA

Output Voltage: V

1.65

3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage VIN (V )

Input Voltage: V

(V)

IN1

V

=2.5V

ROUT

XC6405 Ser ie s (VR:2.5V)

CIN=1 .0μF (ceramic), CL=1.0μF (ceramic)

C

=1.0μF

IN1

ceramic), C

=1.0μF

L1

Topr=25

Ta =2 5

ceramic

)

V

(

(V)

ROUT

2.7

2.5

2.3

XC6405 Ser ie s (VR:2.5V )

V

=2.5V

ROUT

CIN=1 .0μF (ceramic), CL=1.0μF (ceramic)

C

=1.0μF

IN1

ceramic), C

=1.0μF

L1

Top r =25

Ta =2 5 ℃

ceramic

2.60

)

V

2.55

(

(V)

ROUT

2.50

IOUT =0mA

2.1

1.9

Output Voltage VROUT

Output Voltage: V

1.7

2.0 2.5 3.0 Input Voltage VIN (V )

Input Voltage: V

IN1

(V)

1mA

30mA

100mA

IOUT =0mA

2.45

Output Voltage VROUT

Output Voltage: V

2.40

3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage VIN (V )

Input Voltage: V

(V)

IN1

1mA

30mA

100mA

23/52

)

■

℃

(

)

℃

(

)

℃

(

)

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（2）VR Output Voltage vs. Input Voltage (Continued)

V

=3.0V

ROUT

3.2

XC6405 Series (V R:3.0V)

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF

IN1

ceramic), C

=1.0μF

L1

Top r =25

Ta =2 5

ceramic

℃

3.10

XC6405 Series (V R:3.0V)

V

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF

IN1

=3.0V

ROUT

ceramic), C

=1.0μF

L1

Top r =25

Ta =2 5

ceramic

℃

3.0

(V)

2.8

ROUT

IOUT= 0mA

2.6

2.4

Output Voltage VROUT (V

Output Voltage: V

2.2

2.5 3.0 3.5

Input Voltage VIN (V)

Input Voltage: V

V

XC6405 Series ( VR:5.0V )

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

5.2

IN1

ROUT

IN1

=5.0V

(V)

5.0

(V)

4.8

ROUT

IOUT= 0mA

4.6

4.4

Output Voltage VROUT (V

Output Voltage: V

4.2

4.5 5.0 5.5

Input Voltage: V

Input Voltage VIN (V)

IN1

(V)

1mA

30mA

100mA

Top r =25

Ta =2 5 ℃

1mA

30mA

100mA

)

3.05

V

(

(V)

3.00

ROUT

2.95

2.90

Output Voltage VRO UT

IOUT =0mA

1mA

30mA

100mA

Output Voltage: V

2.85

4.0 4.5 5.0 5.5 6.0

℃

5.10

)

5.05

V

(

Input Voltage VIN (V)

Input Voltage: V

V

ROUT

XC6405 Series (V R:5.0V)

CIN=1 .0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF

IN1

ceramic), C

IN1

=5.0V

(V)

=1.0μF

L1

Topr=25

Ta =2 5

ceramic

℃

(V)

5.00

ROUT

4.95

4.90

Output Voltage VROUT

IOUT= 0mA

1mA

30mA

100mA

Output Voltage: V

4.85

5.25.3 5.45.55.65.7 5.85.96.0

Input Voltage: V

Input Voltage VIN (V)

IN1

(V)

24/52

X

■

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（3）Dropout Voltage vs. VR Output Current

XC6405 Series (V R:0.9V)

V

=0.9V

ROUT

CIN=1.0μF (ceramic), CL=4.7μF (cer a mic )

C

=1.0μF(ceramic), CL1=4.7μF(ceramic)

1.6

IN1

1

XC6405 Series (VR:1.8V )

V

ROUT

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

CM524

Series

=1.8V

1.4

1.2

1

0.8

Dropout Voltage Vdif ( V)

Dropout voltage: Vdif (V)

0.6 0 50 100 150 200

1

0.8

)

V

(

0.6

0.4

Topr= 85

Output Current: I

VR Output Current IROUT (mA)

XC6405 Series (V R:2.5V) XC6405 Series (V R:3.0V)

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

Top r = 8 5

V

25

- 40

ROUT

25

- 40

℃ ℃ ℃

ROUT

=2.5V

℃ ℃ ℃

(mA)

0.8

0.6

0.4

0.2

Dropout Voltage Vdif ( V)

Dropout voltage: Vdif (V)

0

0 50 100 150 200

1

0.8

0.6

0.4

Topr= 85

VR Output Current IROUT (mA)

Output Current: I

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

Topr= 85

- 40

-40℃

V

25

- 40

25

ROUT

℃ ℃ ℃

ROUT

=3.0V

(mA)

Dropout Voltage Vdif

Dropout voltage: Vdif (V)

0.2

0

0 50 100 150 200

Output Current: I

VR Output Current IROUT (mA)

XC6405 Series (V R:5.0V)

V

ROUT

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

1

0.8

0.6

0.4

Dropout Voltage Vdif ( V)

0.2

Dropout voltage: Vdif (V)

0

0 50 100 150 200

IN1

Topr= 85

25

- 40

VR Output Current IROUT (mA)

Output Current: I

=5.0V

℃ ℃ ℃

ROUT

(mA)

Dropout Voltage Vdif ( V)

0.2

Dropout voltage: Vdif (V)

0

0 50 100 150 200

Output Current: I

VR Output Current IROUT (mA)

ROUT

(mA)

25/52

■

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（4）Supply Current vs. Input Voltage

V

=0.9V

ROUT

XC6405 Series (VR:0.9) XC6403 Serie s (VR:1.8V)

CIN=1.0μF (ceramic), CL=4.7μF (c eramic )

C

=1.0μF(ceramic), CL1=4.7μF(ceramic)

120

IN1

120

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

C

IN1

V

=1.0μF(ceramic), CL1=1.0μF(ceramic)

ROUT

=1.8V

100

)

A

(μ

(μA)

80

DD

60

V

ROUT

Topr= 85

- 40

IN1

=2.5V

Topr= 85

40

Supply Cur rent ISS

20

Supply Current: I

0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

Input Voltage: V

Input Voltage VIN (V)

XC6405 Series ( VR:2.5V ) XC6405 Ser ie s (V R:3.0V)

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

CIN=1 .0μF (ceramic), CL=1.0μF (c eramic )

120

100

)

A

(μA)

80

(μ

DD

60

40

消費電流 Iss (μA)

Supply Current: I

Supply Cur rent ISS

20

IN1

25

(V)

- 40

25

100

)

A

(μ

80

(μA)

DD

60

℃ ℃ ℃

40

Supply Current ISS

20

Supply Current: I

0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

120

100

A)

μ

80

(μA)

DD

60

40

Supply Current ISS (

Supply Current: I

20

Input Voltage VIN (V)

Input Voltage: V

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

V

ROUT

Topr= 85

IN1

=3.0V

25

- 40

(V)

Topr= 85

℃ ℃ ℃

℃

25

℃

- 40

℃

0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

Input Voltage: V

Input Voltage VIN (V)

XC6405 Series (V R:5.0V)

V

ROUT

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

120

100

A)

μ

(μA)

80

DD

60

40

Supply Cur rent ISS (

Supply Current: I

20

0

IN1

0.0 1.0 2.0 3.0 4.0 5.0 6.0

Input Voltage VIN (V)

Input Voltage: V

IN1

=5.0V

IN1

(V)

Topr= 85

25

- 40

(V)

0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

Input Voltage: V

Input Voltage VIN (V)

℃ ℃ ℃

(V)

IN1

26/52

X

■

A

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（5）VR Output Voltage vs. Ambient Temperature

V

=0.9V

XC6405 Series (V R:0.9)

C

=1.0μF(ceramic), CL1=4.7μF(ceramic)

IN1

CIN=1.0μF (ceramic), CL=4.7μF (cer a mic)

-50-25 0 255075100

Operating Temperature Topr (℃)

mbient Temperature: Ta (℃)

)

V

(

(V)

ROUT

Output Voltage VRO UT

Output Voltage: V

1.10

1.00

0.90

0.80

0.70

0.60

ROUT

VIN=2.0V

V

IOUT =0mA

=30mA

=100mA

IN1

=2.0V

2.00

1.95

)

V

(

1.90

(V)

1.85

ROUT

1.80

1.75

1.70

Output Voltage VROUT

Output Voltage: V

1.65

1.60

-50 -25 0 25 50 75 100

XC6403 Series (VR:1.8V )

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IN1

CIN=1.0μF(ceramic), CL=1.0μF (c eramic )

Operating Temperature Topr (℃)

mbient Temperature: Ta (℃)

V

ROUT

=1.8V

VIN=2.8V

V

IOUT =0mA

=30mA

=100mA

IN1

CM524

Series

=2.8V

XC6405 Series ( VR:2.5V )

C

IN1

CIN=1 .0μF (ceramic), CL=1.0μF (c eramic )

-50 -25 0 25 50 75 100

)

V

(

(V)

ROUT

Output Voltage VRO UT

Output Voltage: V

2.70

2.65

2.60

2.55

2.50

2.45

2.40

2.35

2.30

mbient Temperature: Ta (℃)

XC6405 Series ( VR:5.0V )

C

IN1

CIN=1.0μF (ceramic), CL=1.0μF (c eramic )

)

V

(

(V)

ROUT

5.20

5.15

5.10

5.05

5.00

V

=2.5V

ROUT

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IOUT= 0mA

=30mA

=100mA

Operating Temperature Topr (℃)

V

=5.0V

ROUT

=1.0μF(ceramic), CL1=1.0μF(ceramic)

IOUT =0mA

=30mA

=100mA

VIN=3.5V

V

=3.5V

IN1

VIN=6.0V

V

=6.0V

IN1

XC6405 Series (VR:3.0V )

V

=3.0V

ROUT

C

=1.0μF(ceramic), CL1=1.0μF(ceramic)

CIN=1.0μF (ceramic), CL=1.0μF (cer a mic)

3.20

3.15

)

V

3.10

(

(V)

3.05

ROUT

3.00

2.95

2.90

Output Voltage VROUT

Output Voltage: V

2.85

2.80

-50 -25 0 25 50 75 100

IN1

IOUT= 0mA

=100mA

Operating Temperature Topr (℃)

mbient Temperature: Ta (℃)

VIN=4.0V

V

=30mA

IN1

=4.0V

4.95

4.90

Output Voltage VRO UT

Output Voltage: V

4.85

4.80

-50-25 0 25 50 75100

Operating Temperature Topr (℃)

mbient Temperature: Ta (℃)

27/52

■

pp

y

DD

(

μ

)

A

pp

y

(

μ

)

A

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（6）Supply Current vs. Ambient Temperature

V

=0.9V

ROUT

V

=2.0V

IN1

V

ROUT

=1.8V

V

=2.8V

IN1

A

Current: I l

Su

(μA)

DD

mbient Temperature: Ta (℃)

V

=2.5V

ROUT

A

DD

Current: I l

Su

mbient Temperature: Ta (℃)

V

=3.0V

ROUT

V

=3.5V

IN1

(μA)

DD

V

=4.0V

IN1

Supply Current: I

mbient Temperature: Ta (℃)

(μA)

DD

Supply Current: I

mbient Temperature: Ta (℃)

V

ROUT

=5.0V

Supply Current: I

mbient Temperature: Ta (℃)

V

=6.0V

IN1

28/52

X

■

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（7）Rdelay vs. Ambient Temperature （8）Output Noise Density

C

=1.0μF(ｾﾗﾐｯｸ), CL1=1.0μF(ceramic)

800

700

600

500

400

300

Rdelay (kΩ)

200

100

0

-50 -25 0 25 50 75 100 Ambient Temperature: Ta(℃)

Output Noise Density (μV/RootHz)

10

1

0.1

0.01

IN1

0.1 1 10 100

Frequency: (kHz)

（9）Detect Voltage, Release Voltage vs. Ambient Temperature

2.20

(V)

DR

,V

2.15

DF

2.10

2.05

VDF=2.0V

XC6405 Series (V D:2.0V)

VDR

)

V

(

(V)

DR

,V

DF

2.90

2.85

2.80

2.75

XC6405 Series (V D:2.7V)

VDF=2.7V

V

=4.0V

VIN=4.0V

IOUT=10mA CL=10uF(ｾﾗﾐｯｸ

VDR

IN1

CM524

Series

2.00

1.95

1.90

Detect Voltage, Release Voltage VDF,VDR (V)

-50 -25 0 25 50 75 100

Detect Voltage, Release Voltage: V

Operating Temper ature Topr (OC)

Operating Temper ature Topr (℃)

Ambient Temperature: Ta (℃)

VDF

VDF=3.6V

)

3.80

V

(

(V)

DR

3.75

,V

DF

3.70

3.65

3.60

3.55

3.50

Detect Voltage, Release Voltage VDF,VDR

-50 -25 0 25 50 75 100

Detect Voltage, Release Voltage: V

Ambient Temperature: Ta (℃)

Operating Temper ature Topr (℃)

VDR

VDF

2.70

2.65

2.60

Detect Voltage, Release Voltage VDF,VDR

-50 -25 0 25 50 75 100

Detect Voltage, Release Voltage: V

)

5.40

V

(

(V)

DR

,V

5.30

DF

5.20

5.10

5.00

4.90

Detect Voltage, Release Voltage VDF,VDR

-50-25 0 25 50 75100

Detect Voltage, Release Voltage: V

Operating Temperature Topr (℃)

Ambient Temperature: Ta (℃)

XC6405 Series (V D:5.0V)XC6405 Series (V D:3.6V)

Ambient Temperature: Ta (℃)

Operating Temperature Topr (℃)

VDF

VDF=5.0V

VDR

VDF

29/52

℃

■

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（10）VD N-channel Driver Transistor Output Current vs. VDS

VDF=2.0V

XC6405 Series (VD:2.0V) XC6405 Ser ie s (V D:2.7V)

Ta =2 5 ℃

8

7

)

6

mA

(mA)

(

5

DOUT

4

3

2

Output Current IOUT

Output Current: I

1

0

00.511.522.5

VDS (V)

Topr =25

VIN=2.0V

16

14

)

12

mA

(mA)

(

10

DOUT

8

6

4

Output Current IOUT

Output Current: I

2

0

00.511.522.53

VDF=2.7V

VIN=1.0V

VDS (V)

Ta =2 5 ℃

VIN=2.5V

VIN=2.0V

VIN=1.5V

VDF=3.6V

Ta =2 5 ℃

24

21

)

18

mA

(mA)

(

15

DOUT

12

9

VIN=1.5V

VDS (V)

VIN=2.0V

6

Output Current IOUT

Output Current: I

3

0

01234

Topr =25

VIN=3.0V

VIN=2.5V

XC6405 Series (V D:5.0V)XC6405 Series (V D:3.6V)

VDF=5.0V

Ta =2 5 ℃

32

28

)

24

mA

(mA)

(

20

DOUT

16

12

8

Output Current IOUT

Output Current: I

4

0

01234

VIN=2.0V

VIN=1.5V

VDS (V)

Topr =25

VIN=4.5V

VIN=3.5V

VIN=2.5V

30/52

X

℃

■

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（11）VD N-channel Driver Transistor Output Current vs. Input Voltage

XC6405 Series ( VD:2.0V )

XC6405 Series (VD:2.7V )

VDF=2.7V VDF=2.0V

CM524

Series

8

)

mA

6

(mA)

(

DOUT

4

2

Output Current IO UT

Output Current: I

0

20

16

)

mA

(mA)

(

DOUT

12

VDS=0.5V

00.511.522.5

Input Voltage VIN (V)

Input Voltage: V

XC6405 Series ( VD:3.6V )

VDF=3.6V VDF=5.0V

VDS=0.5V

25

-40

℃

25

85

℃

(V)

IN1

-40

℃

15

)

12

mA

(mA)

(

DOUT

9

6

3

Output Voltage IO UT

Output Current: I

0

01234

25

)

20

mA

(mA)

(

15

DOUT

VDS=0.5V

-40

℃

25

85

℃

Input Voltage VIN (V)

Input Voltage: V

XC6405 Series (V D:5.0V)

VDS=0.5V

25

℃

IN1

(V)

-40

℃

8

4

Output Current IOUT

Output Current: I

0

01234

Input Voltage VIN (V)

Input Voltage: V

85

(V)

IN1

10

5

Output Current IOUT

Output Current: I

0

01234 56

Input Voltage VIN (V)

Input Voltage: V

85

℃

(V)

IN1

31/52

■

入力電圧

(

)

(

)

(

)

(

)

(

)

(

)

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（12）Input Transient Response



V

=0.9V

ROUT

C

=4.7μF

L1

Input Voltage

I

=1mA, tr=tf=5.0μs

ROUT

ceramic

, Ta=25℃

V

=0.9V

ROUT

I

ROUT

=4.7μF

C

L1

Input Voltage

=30mA, tr=tf=5.0μs

ceramic

, Ta=25℃

(V)

IN1

Input Voltage: V

(V)

IN1

Input Voltage: V

Output Voltage

Time (40μs/div)

V

=0.9V

ROUT

I

=100mA, tr=tf=5.0μs

ROUT

C

=4.7μF

L1

Input Voltage

Output Voltage

ceramic

, Ta=25℃

(V)

ROUT

Output Voltage: V

(V)

ROUT

Output Voltage: V

(V) Input Voltage: V

IN1

Input Voltage: V

(V)

IN1

Output Voltage

Time (40μs /div)

V

=1.8V

ROUT

I

=1mA, tr=tf=5.0μs

ROUT

=1.0μF

C

L1

Input Voltage

Output Voltage

ceramic

(V)

ROUT

Output Voltage: V

, Ta=25℃

(V)

ROUT

Output Voltage: V

(V)

IN1

Input Voltage: V

Time (40μs /div)

V

=1.8V

ROUT

I

=30mA, tr=tf=5.0μs

ROUT

C

=1.0μF

L1

Input Voltage

出力電圧

Output Voltage

Time (40μs /div)

ceramic

, Ta=25℃

(V)

ROUT

出力電圧 VOUT(V)

Output Voltage: V

(V)

IN1

Input Voltage: V

Time (40μs /div)

V

=1.8V

ROUT

I

=100mA, tr=tf=5.0μs

ROUT

C

=1.0μF

L1

Input Voltage

Output Voltage

ceramic

Time (40μs /div)

, Ta=25℃

(V)

ROUT

Output Voltage: V

32/52

X

)

■

入力電圧

(

)

(

)

(

)

(

)

(

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（12）Input Transient Response (Continued)

V

XC6405 Ser ies (VR:2.5V) XC6405 Ser ie s (V R:2.5V)

6

=2.5V

ROUT

IOUT=1mA, tr=tf=5.0μsec,

I

=1mA, tr=tf=5.0μs

ROUT

CL= 1. 0μF (ceramic), Topr=25

=1.0μF

ceramic

C

L1

, Ta=25℃

℃

2.58

6

V

=2.5V

ROUT

IOUT=30mA, tr =tf=5.0μsec,

CL= 1. 0μF (ceramic), Topr=25

=1.0μF

C

L1

I

=30mA, tr=tf=5.0μs

ROUT

ceramic

, Ta=25℃

CM524

Series

℃

2.58

5

(V)

4

IN1

3

2

Input Voltage VIN (V

Input Voltage: V

1

0

6

5

)

(V)

V

(

4

IN1

3

2

Input Voltage VIN

Input Voltage: V

1

0

Input Voltage

Output Voltage

Time (40μs /div)

Time (40μsec/div)

V

XC6405 Series (VR:2.5V )

=2.5V

ROUT

IOUT=100mA, tr=tf=5.0μsec,

I

=100mA, tr=tf=5.0μs

ROUT

CL= 1. 0μF (ceramic), Topr=25

C

=1.0μF

L1

Input Voltage

Output Voltage

Time ( 40μsec/div)

Time (40μs /div)

ceramic

℃

, Ta=25℃

2.56

2.54

2.52

2.50

2.48

2.46

2.58

2.56

2.54

2.52

2.50

2.48

2.46

(V)

ROUT

Output Voltage VOUT (V)

Output Voltage: V

)

V

(V)

(

ROUT

出力電圧 VOUT(V) 出力電圧VOUT(V)

Output Voltage VOUT

Output Voltage: V

5

)

(V)

V

(

4

IN1

3

2

Input Voltage VIN

Input Voltage: V

1

0

6

5

)

V

(V)

(

4

IN1

3

2

Input Voltage VIN

Input Voltage: V

1

0

Input Voltage

Output Voltage

Time ( 4 0

Time (40μs /div)

V

XC6405 Ser ies (VR:3.0V)

Input Voltage

Output Voltage

Time ( 40μsec/div)

Time (40μs /div)

sec/div)

μ

=3.0V

ROUT

IOUT= 1 mA , tr =tf =5. 0μsec,

I

=1mA, tr=tf=5.0μs

CL= 1.0μF (ceramic), Topr=25

Output Voltage

ROUT

=1.0μF

C

L1

Input Voltage

ceramic

℃

, Ta=25℃

2.56

2.54

2.52

2.50

2.48

2.46

3.08

3.06

3.04

3.02

3.00

2.98

2.96

)

V

(

(V)

ROUT

Output Voltage VOUT

Output Voltage: V

)

V

(

(V)

ROUT

Output Voltage VOUT

Output Voltage: V

V

=3.0V

ROUT

XC6405 Ser ie s (V R:3.0V)

I

=100mA, tr=tf=5.0μs

IOUT=100mA, tr=tf=5.0μsec,

ROUT

=1.0μF(ceramic), Ta=25℃

C

CL= 1.0μF (ceramic), Topr=25

L1

Input Voltage

Output Voltage

Time ( 40μsec/div)

Time (40μs /div)

℃

3.08

3.06

)

V

(

(V)

3.04

ROUT

3.02

3.00

Output Voltage VOUT

2.98

Output Voltage: V

2.96

6

5

)

V

(V)

(

4

IN1

3

2

Input Voltage VIN

Input Voltage: V

1

0

V

XC6405 Ser ie s (V R:3.0V)

Input Voltage

=3.0V

ROUT

IOUT=30mA, tr=tf=5.0μsec,

I

=30mA, tr=tf=5.0μs

ROUT

CL= 1.0μF (ceramic), Topr=25

C

=1.0μF

L1

Input Voltage

Output Voltage

Time ( 40μsec/div)

時間(40μsec/div)

Time (40μs /div)

ceramic

, Ta=25℃

℃

3.08

3.06

)

V

(

(V)

3.04

ROUT

3.02

3.00

Output Voltage VOUT

2.98

Output Voltage: V

2.96

6

5

)

V

(V)

(

4

IN1

3

2

Input Voltage VIN

Input Voltage: V

1

0

33/52

■

(

)

(

)

(

)

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（12）Input Transient Response (Continued)

V

=5.0V

ROUT

8

7

)

(V)

V

(

IN1

6

5

4

Input Voltage VIN

Input Voltage: V

3

2

XC6405 Ser ies (V R:5.0V)

IOUT=1mA, tr =tf=5.0μsec,

I

=1mA, tr=tf=5.0μs

ROUT

CL= 1. 0μF (cer a mic), To pr =25

=1.0μF

ceramic

C

L1

Inp u t V oltag e

Input Voltage

Output Voltage

時間(40μsec/div) 時間(40μsec/div)

Time ( 40μsec/div)

Time (40μs /div)

, Ta=25℃

℃

5.08

5.06

5.04

5.02

5.00

4.98

4.96

)

V

(V)

(

ROUT

出力電圧 VOUT(V) 出力電圧 VOUT(V) 出力電圧 VOUT(V)

Output Voltage VOUT

Output Voltage: V

8

7

(V)

6

IN1

5

4

入力電圧 VIN(V)

Input Voltage VIN (V)

Input Voltage: V

3

2

XC6405 Ser ies (V R:5.0V)

V

=5.0V

ROUT

IOUT=30mA, tr =tf=5.0μsec,

I

ROUT

CL= 1. 0μF (cer a mic), To pr =25

=1.0μF

C

L1

Input Voltage

Output Voltage

Time (40μs /div)

Time ( 40μsec/div)

=30mA, tr=tf=5.0μs

ceramic

, Ta=25℃

℃

5.08

5.06

)

V

(

5.04

5.02

5.00

4.98

(V)

ROUT

Output Voltage VOUT

Output Voltage: V

4.96

8

7

)

V

(V)

(

6

IN1

5

4

Input Voltage VIN

Input Voltage: V

3

2

V

XC6405 Ser ies (V R:5.0V)

=5.0V

ROUT

IOUT=100mA, tr=tf=5.0μsec,

I

=100mA, tr=tf=5.0μs

ROUT

CL= 1.0μF (ceramic), Topr=25

C

=1.0μF

L1

Input Voltage

Output Voltage

Time (40μs/div)

Time ( 40μsec/div)

ceramic

, Ta=25℃

℃

5.08

5.06

5.04

5.02

5.00

4.98

4.96

)

V

(

(V)

ROUT

Output Voltage VOUT

Output Voltage: V

34/52

X

■

(

)

時間

(

)

(

)

(

)

(

)

(

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（13）Load Transient Response

V

=0.9V

ROUT

V

=2.0V, tr=tf=5.0μs, Ta=25℃

C

IN1

=1.0μF(ceramic), CL1=4.7μF(ceramic)

C

V

ROUT

V

=2.0V, tr=tf=5.0μs, Ta=25℃

IN1

=1.0μF(ceramic), CL1=4.7μF(ceramic)

IN1

CM524

Series

=0.9V

(V)

ROUT

Output Voltage: V

(V)

ROUT

入力電圧 VIN(V)

Output Voltage: V

Output Voltage

Output Current

Time

20μs /div

V

ROUT

V

=2.0V, tr=tf=5.0μsec, Ta=25℃

C

IN1

=1.0μF(ceramic), CL1=4.7μF(ceramic)

IN1

入力電圧

Output Voltage

Output Current

=0.9V

(mA)

ROUT

Output Current: I

(mA)

ROUT

出力電圧 VOUT (V)

Output Current: I

(V)

ROUT

入力電圧 VIN(V)

Output Voltage: V

(V)

ROUT

Output Voltage: V

Output Voltage

Output Current

Time

20μs /div

V

=1.8V

ROUT

V

=2.8V, tr=tf=5.0μs

IN1

=1.0μF(ceramic), Ta=25℃

C

IN1=CL1

Output Voltage

Output Current

(mA)

ROUT

Output Current: I

(mA)

ROUT

Output Current: I

(V)

ROUT

Output Voltage: V

時間(20μsec/div)

40μsec/div)

Time

20μs /div

V

=1.8V

ROUT

V

IN1

=1.0μF(ceramic), Ta=25℃

C

IN1=CL1

Output Voltage

Output Current

Time

20μs /div

=2.8V, tr=tf=5.0μs

(mA)

ROUT

Output Current: I

(V)

ROUT

Output Voltage: V

Time

20μs /div

V

=1.8V

ROUT

V

=2.8V, tr=tf=5.0μs

IN1

=1.0μF(ceramic), Ta=25℃

C

IN1=CL1

Output Voltage

Output Current

Time

20μs /div

(mA)

ROUT

Output Current: I

35/52

■

(

)

(

)

(

)

(

)

(

)

(

)

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（13）Load Transient Response (Continued)

V

)

V

(V)

(

ROUT

2.55

2.50

2.45

XC6405 Ser ie s (V R:2.5V) XC6405 Ser ie s (V R:2.5V)

C

IN1=CL1

CIN=CL= 1.0μF (ceramic), Topr=25

Output Voltage

V

=3.5V, tr=tf=5.0μs

VIN=2.5V , tr=tf=5.0μsec

IN1

=1.0μF(ceramic), Ta=25℃

Output Voltage

℃

250

)

200

mA

(mA)

(

ROUT

150

2.55

2.50

)

V

(V)

(

ROUT

2.45

=2.5V

ROUT

V

ROUT

=1.0μF(ceramic), Ta=25℃

C

CIN=CL= 1.0μF (ceramic), Topr=25

IN1=CL1

Output Voltage

=2.5V

V

=3.5V, tr=tf=5.0μs

VIN=2.5V , tr=tf=5.0μsec

IN1

℃

250

200

)

mA

(mA)

(

ROUT

150

Output Voltage VOUT

Output Voltage: V

(V)

ROUT

Outpu t V oltage VO UT (V)

Output Voltage: V

2.40

2.35

2.30

2.55

2.50

2.45

2.40

2.35

2.30

Output Current

Time

20μs /div

Time ( 2 0μsec/div)

XC6405 Ser ies (V R:2.5V)

V

=2.5V

ROUT

V

VIN=2.5V, tr=tf =5.0μsec

=1.0μF(ceramic), Ta=25℃

C

IN1=CL1

CIN=CL =1. 0μF (ceramic), Topr=25

Output Voltage

Output Cur rent

Output Current

Time (20μsec/div)

Time

20μs /div

=3.5V, tr=tf=5.0μs

IN1

100

50

Output Curr ent IOUT

Output Current: I

0

℃

250

200

(mA)

150

ROUT

100

Ou tpu t Cu rre n t I OUT (mA)

50

Output Current: I

0

2.40

Output Voltage VOUT

2.35

Output Voltage: V

2.30

)

V

(V)

(

ROUT

Output Voltage VOUT

Output Voltage: V

3.05

3.00

2.95

2.90

2.85

2.80

Output Current

Time ( 2 0μsec/div)

Time

20μs /div

V

XC6405 Ser ie s (V R:3.0V)

C

CIN=CL= 1.0μF (ceramic), Topr=25

Time

=3.0V

ROUT

VIN=4.0V , tr=tf=5.0μsec

=1.0μF(ceramic), Ta=25℃

IN1=CL1

Output Voltage

Output Current

Time ( 20μsec/div)

20μs /div

V

=4.0V, tr=tf=5.0μs

IN1

100

Output Current IOUT

50

Output Current: I

0

℃

250

200

)

(mA)

mA

(

150

ROUT

100

50

Output Current IOUT

Output Current: I

0

36/52

(V)

ROUT

Outpu t Volt age VO UT (V)

Output Voltage: V

3.05

3.00

2.95

2.90

2.85

2.80

V

XC6405 Ser ie s (V R:3.0V)

C

CIN=CL =1. 0μF (ceramic), Topr=25

IN1=CL1

Output Voltage

Output Current

Time

Time (20μsec/div)

=3.0V

ROUT

VIN=4.0V, tr=tf =5.0μsec

V

=4.0V, tr=tf=5.0μs

IN1

=1.0μF(ceramic), Ta=25℃

Output Voltage

Output Cur rent

20μs /div

V

=3.0V

XC6405 Series (VR:3.0V )

℃

250

200

(mA)

ROUT

150

100

50

Output Current IOUT (mA)

Output Current: I

0

3.05

3.00

)

V

(V)

(

ROUT

2.95

2.90

2.85

Output Voltage VOUT

Output Voltage: V

2.80

ROUT

V

=4.0V, tr=tf=5.0μs

VIN=4.0V, tr=tf =5.0μsec

IN1

=1.0μF(ceramic), Ta=25℃

C

CIN=CL =1. 0μF (ceramic), Topr=25

IN1=CL1

Output Voltage

Output Cur rent

Output Current

Time

20μs /div

Time ( 2 0μsec/div)

℃

250

200

)

mA

(

(mA)

150

ROUT

100

50

Output Curr ent IOUT

Output Current: I

0

X

■

(

)

(

)

(

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（13）Load Transient Response (Continued)

V

=5.0V

ROUT

V

IN1

=1.0μF(ceramic), Ta=25℃

C

IN1=CL1

=6.0V, tr=tf=5.0μs

V

C

IN1=CL1

ROUT

=5.0V

V

=6.0V, tr=tf=5.0μs

IN1

=1.0μF(ceramic), Ta=25℃

CM524

Series

(V)

ROUT

Output Voltage: V

(V)

ROUT

Output Voltage: V

Output Voltage

Output Current

Time

20μs /div

V

=5.0V

ROUT

V

IN1

=1.0μF(ceramic), Ta=25℃

C

IN1=CL1

Output Voltage

Output Current

=6.0V, tr=tf=5.0μs

(mA)

ROUT

Output Current: I

(mA)

ROUT

Output Current: I

(V)

ROUT

Output Voltage: V

Output Voltage

Output Current

Time

20μs /div

(mA)

ROUT

Output Current: I

Time

20μs /div

37/52

■

(

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（14）Ripple Rejection Rate

90

80

70

60

50

40

30

リップル除去率 R R

20

10

ripple rejection ratio: RR (dB)

0

0.01 0.1 1 10 100

Ripple Frequency: f (kHz)

V

=0.9V

ROUT

V

=2.25VDC+0.5Vp-pAC

IN1

I

ROUT

VIN=2.5V DC+0.5Vp-PAC

=50mA, C

=1.0μF(ceramic)

L1

IOUT=50mA CL=4. 7μF（ｾﾗﾐｯｸ）

リップル周波数 f (kHz)

リップル周波数 f ( kH z)

V

ROUT

V

VIN=2.8V DC+0.5Vp-PAC

=50mA, C

I

ROUT

90

IOUT=50mA CL=1. 0μF（ｾﾗﾐｯｸ）

80

70 60

50 40

30

リップル除去率 R R

20

10

ripple rejection ratio: RR (dB)

0

0.01 0.1 1 10 100

リップル周波数 f (kHz)

リップル周波数 f ( kH z)

Ripple Frequency: f (kHz)

=1.8V

=2.8VDC+1.0Vp-pAC

IN1

=1.0μF(ceramic)

L1

V

=2.5V

ROUT

V

=3.5VDC+1.0Vp-pAC

IN1

VIN=3.5V DC+0.5Vp-PAC

=50mA, C

I

ROUT

90

IOUT=50mA CL=1. 0μF（ｾﾗﾐｯｸ）

=1.0μF(ceramic)

L1

80

70

60

50

40

30

リップル除去率 R R

20

10

ripple rejection ratio: RR (dB)

0

0.01 0.1 1 10 100

90

リップル周波数 f (kHz)

リップル周波数 f ( kH z)

Ripple Frequency: f (kHz)

V

=5.0V

ROUT

V

=5.75VDC+0.5Vp-pAC

IN1

VIN=5.75V DC+0.5Vp-PAC

=50mA, C

I

ROUT

IOUT=50mA CL=1.0μF（ｾﾗﾐｯｸ）

=1.0μF(ceramic)

L1

80

70

60

50

40

30

リップル除去率 R R

20

10

ripple rejection ratio: RR (dB)

0

リップル周波数 f (kHz)

0.01 0.1 1 10 100 リップル周波数 f ( kH z)

Ripple Frequency: f (kHz)

V

=3.0V

ROUT

V

=4.0VDC+1.0Vp-pAC

IN1

VIN=4.0V DC+0.5Vp-PAC

=50mA, C

I

ROUT

90

IOUT=50mA CL=1. 0μF（ｾﾗﾐｯｸ）

=1.0μF(ceramic)

L1

80

70

60

50

40

30

リップル除去率 RR

20

ripple rejection ratio: RR (dB)

10

0

リップル周波数 f (kHz)

0.01 0.1 1 10 100 リップル周波数 f ( kH z)

Ripple Frequency: f (kHz)

38/52

X

■

(

)

(

)

(

)

(

)

(

)

(

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（15）Input Voltage Rising Response Time

V

=0.9V

ROUT

I

=1mA, tr= 5.0μs

=0→2.0V, CL1=4.7μF

V

4

IN1

ROUT

ceramic

5

4

ROUT

I

ROUT

=0→2.0V, CL1=4.7μF

V

IN1

=0.9V

=30mA, tr= 5.0μs

ceramic

CM524

Series

5

(V)

IN1

Input Voltage: V

(V)

IN1

Input Voltage: V

-2

-4

-6

-2

-4

-6

2

0

Inpit Voltage

Output Voltage

Time (20μs/div)

V

=0.9V

ROUT

I

=100mA, tr= 5.0μs

V

4

IN1

ROUT

=0→2.0V, CL1=4.7μF

ceramic

2

0

Inpit Voltage

Output Voltage

Time (20μs/div)

4

(V)

ROUT

3

2

1

Output Voltage: V

0

(V)

IN1

Input Voltage: V

-2

-4

-6

2

Inpit Voltage

0

4

(V)

ROUT

3

2

Output Voltage

1

Output Voltage: V

0

Time (20μs/div)

V

=1.8V

ROUT

I

=1mA, tr= 5.0μs

V

=0→2.8V, CL1=1.0μF

IN1

(V)

IN1

Input Voltage: V

4

2

0

-2

-4

5

(V)

4

ROUT

3

2

1

Output Voltage: V

0

-6

ROUT

Inpit Voltage

Output Voltage

ceramic

5

(V)

4

ROUT

3

2

1

Output Voltage: V

0

Time (20μs/div)

(V)

IN1

Input Voltage: V

-2

-4

-6

V

=1.8V

ROUT

I

=30mA, tr= 5.0μs

V

IN1

4

2

0

ROUT

=0→2.8V, CL1=1.0μF

Inpit Voltage

Output Voltage

ceramic

5

4

(V)

ROUT

3

2

1

Output Voltage: V

0

(V)

IN1

Input Voltage: V

4

2

0

-2

-4

-6

Time (20μs/div)

V

=1.8V

ROUT

I

=100mA, tr= 5.0μs

V

IN1

ROUT

=0→2.8V, CL1=1.0μF

Inpit Voltage

Output Voltage

Time (20μs/div)

ceramic

5

4

(V)

ROUT

3

2

1

Output Voltage: V

0

39/52

■

(

)

(

)

(

)

(

)

(

XCM524 Series

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（15）Input Voltage Rising Response Time (Continued)

(V)

IN1

XC6405 Series (VR:2.5V )

V

=2.5V

ROUT

IOUT=1mA, tr=5.0μsec

I

=1mA, tr= 5.0μs

VIN=0→3.5V, CL=4.7μF (ceramic)

=0→3.5V, CL1=1.0μF

V

5

3

1

IN1

ROUT

Input Voltage

Inpit Voltage

ceramic)

(V)

IN1

5

3

1

5

)

4

V

(

(V)

ROUT

3

XC6405 Series (VR:2.5V )

V

ROUT

IOUT=30mA, tr=5.0μsec

I

VIN=0→3.5V, CL=4.7μF (ceramic)

V

IN1

ROUT

=0→3.5V, CL1=1.0μF

Inp u t V oltag e

Inpit Voltage

=2.5V

=30mA, tr= 5.0μs

ceramic

5

)

4

V

(V)

(

ROUT

3

-1

Input Voltage VIN (V)

-3

Input Voltage: V

-5

(V)

IN1

Input Voltage VIN (V)

Input Voltage: V

Input Voltage VIN (V)

Input Voltage: V

(V)

IN1

Input Voltage VIN (V)

Input Voltage: V

-1

Output Voltage

-3

-5

XC6405 Series (VR:3.0V )XC6405 Ser ies (V R:2.5V)

VIN=0→4.0V, CL=1.0μF (c er amic)

5

3

1

-1

-3

-5

V

Output Voltage

Time ( 20μsec/div)

Time (20μs/div)

V

=3.0V

ROUT

I

IOUT=1mA, tr=5.0μsec

=0→4.0V, CL1=1.0μF

IN1

Time ( 20μsec/div)

Time (20μs/div)

ROUT

Inp u t V oltag e

Inpit Voltage

Output Voltage

=1mA, tr= 5.0μs

ceramic

2

Output Voltage

Time ( 2 0μsec/div)

Time (20μs/div)

V

=2.5V

ROUT

IOUT=100mA, tr=5.0μsec

I

=100mA, tr= 5.0μs

VIN=0→3.5V, CL=4.7μF (cer a mic)

V

5

3

1

-1

-3

-5

IN1

Time ( 20μsec/div)

ROUT

=0→3.5V, CL1=1.0μF

Input Voltage

Inpit Voltage

Output Voltage

Time (20μs/div)

ceramic

1

Output Voltage VOUT

Output Voltage: V

0

5

)

V

4

(

(V)

ROUT

3

2

1

Output Voltage VOUT

Output Voltage: V

0

2

1

Output Voltage VOUT

Output Voltage: V

0

5

)

4

V

(

(V)

ROUT

3

2

1

Output Voltage VOUT

Output Voltage: V

0

40/52

5

3

)

V

(V)

(

IN1

1

-1

Input Voltage VIN

-3

Input Voltage: V

-5

XC6405 Ser ie s (V R:3.0V) XC6405 Ser ies (V R:3.0V)

V

=3.0V

ROUT

IOUT=30mA, tr=5.0μsec

I

=30mA, tr= 5.0μs

VIN=0→4.0V, CL=1.0μF (ceramic)

V

IN1

Time ( 2 0μsec/div)

ROUT

=0→4.0V, CL1=1.0μF

Input Voltage

Inpit Voltage

Output Voltage

Time (20μs/div)

ceramic)

)

V

(V)

(

IN1

-1

Input Voltage VIN

-3

Input Voltage: V

-5

5

3

1

5

)

4

V

(

(V)

ROUT

3

2

1

Output Voltage VOUT

Output Voltage: V

0

V

=3.0V

ROUT

IOUT=100mA, tr=5.0μsec

I

=100mA, tr= 5.0μs

VIN=0→4.0V, CL=1.0μF (ceramic)

V

IN1

ROUT

=0→4.0V, CL1=1.0μF

Input Voltage

Inpit Voltage

Output Voltage

Time ( 20μsec/div)

Time (20μs/div)

ceramic

5

)

4

V

(

(V)

ROUT

3

2

1

Output Voltage VOUT

Output Voltage: V

0

X

■

(

)

(

)

(

)

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

（15）Input Voltage Rising Response Time (Continued)

XC6405 Series (VR:5.0V )

7

V

=5.0V

ROUT

IOUT=1mA, tr=5.0μsec

I

=1mA, tr= 5.0μs

VIN=0→6.0V, CL=1.0μF (c er amic)

=0→6.0V, CL1=1.0μF

V

IN1

ROUT

ceramic

XC6405 Ser ies (VR:5.0V)

10

7

V

ROUT

VIN=0→6.0V, CL=1.0μF (c er amic)

=0→6.0V, CL1=1.0μF

V

IN1

=5.0V

IOUT=30mA, tr=5.0μsec

I

=30mA, tr= 5.0μs

ROUT

ceramic

CM524

Series

10

5

)

V

(V)

(

IN1

3

1

Input Voltage VIN

-1

Input Voltage: V

-3

7

5

)

V

(V)

(

IN1

3

1

Input Voltage VIN

-1

Input Voltage: V

-3

Input Voltage

Inpit Voltage

Output Voltage

Time ( 2 0μsec/div)

Time (20μs/div)

XC6405 Ser ie s (V R:5.0V)

V

=5.0V

ROUT

IOUT=100mA, tr=5.0μsec

I

=100mA, tr= 5.0μs

VIN=0→6.0V, CL=1.0μF (c er amic)

V

IN1

Output Voltage

Time ( 20μsec/div)

Time (20μs/div)

ROUT

=0→6.0V, CL1=1.0μF

Input Voltage

Inpit Voltage

ceramic

)

8

V

(V)

(

ROUT

6

4

2

Output Voltage VOUT

Output Voltage: V

0

10

)

8

V

(V)

(

ROUT

6

4

2

Output Voltage VOUT

Output Voltage: V

0

5

)

V

(V)

(

IN1

3

1

Input Voltage VIN

-1

Input Voltage: V

-3

Input Voltage

Inpit Voltage

Output Voltage

Time ( 20μsec/div)

Time (20μs/div)

8

)

V

(

(V)

ROUT

6

4

2

Output Voltage VOUT

Output Voltage: V

0

41/52

)

XCM524 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●2ch:DC/DC Convertor Block

(1) Efficiency vs. Output Current

V

=1.8V, f

DCOUT



V

IN2

3.6V

Output Current: I

= 4.2V

100

PWM/ PFM A ut o ma tic Sw i t c hin g Co nt r ol

90

80 70 60

50 40 30

Efficency:EFFI (%

20

10

0

0.1 1 10 100 1000

(2) Output Voltage vs. Output Current

V

=1.8V, f

2.1

DCOUT

2.0

(V)

1.9

DCOUT

PWM/ PFM A ut o ma t ic Sw i t c hing Co nt r ol

1.8

1.7

1.6

Output Voltage: V

1.5

0.1 1 10 100 1000

Output Current: I

(3) Ripple Voltage vs. Output Current

V

100

DCOUT

=1.8V, f

=1.2MHz

OSC

L=4. 7μH( NR 4018) C

PWM Control V

3.6V

OUT 2

=1.2MHz

OSC

L=4. 7μH( NR 4018) C

V

PWM Control

OUT 2

=1.2MHz

OSC

L=4. 7μH( NR 4018) C

=4.7μF CL2=10μ F

IN2

= 4.2V

IN2

(mA)

=4.7μF CL2=10μ F

IN2

4.2V,3.6V

＝

IN2

(mA)

=4.7μF CL2=10μ F

IN2

V

=1.8V, f

DCOUT

100

PWM/ PFM A ut o ma t ic Sw itc hing Co n tr o l

90

=3.0MHz

OSC

L=1. 5μH( NR 3015) C

=4.7μF CL2=10μ F

IN2

80 70 60

50 40 30

Efficency: EFFI (%

20

V

3.6V

IN2

= 4.2V

PWM Control V

IN2

3.6V

10

0

0.1 1 10 100 1000

Output Current: I

V

=1.8V, f

DCOUT

2.1

2.0

(V)

1.9

DCOUT

PWM/ PFM A ut o ma t ic Sw itc hing Co n tr o l

OSC

L=1. 5μH( NR 3015) C

(mA)

OUT 2

=3.0MHz

IN2

V

IN2

=4.7μF CL2=10μF

＝

1.8

1.7 PWM Control

1.6

Output Voltage: V

1.5

0.1 1 10 100 1000

100

Output Current: I

V

=1.8V, f

DCOUT

OSC

L=1. 5μH( NR 3015) C

(mA)

OUT 2

=3.0MHz

IN2

=4.7μF CL2=10μF

= 4.2V

4.2V,3.6V

80

60

PWM Control

40

20

Ripple Voltage: Vr (mV)

V

IN2

＝

4.2V,3.6V

PWM/ PFM A ut o ma t ic Sw itching Control V

4.2V

＝

IN2

3.6V

0

0.1 1 10 100 1000

Output Current: I

OUT 2

(mA)

80

60

PWM Control V

4.2V,3.6V

＝

IN2

40

20

Ripple Voltage: Vr (mV)

PWM/ PFM A uto ma t ic Sw itching Control V

4.2V

＝

IN2

3.6V

0

0.1 1 10 100 1000

Output Current: I

OUT 2

(mA)

42/52

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(4) Oscillation Frequency vs. Ambient Temperature

1.5

1.4

(MHz)

OSC

1.3

1.2

1.1

1.0

0.9

Os cillation Frequency : f

0.8

V

DCOUT

=1.8V, f

=1.2MHz

OSC

L=4. 7μH( NR 4018) C

V

=3.6V

IN2

=4.7μF CL2=10μ F

IN2

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

3.5

3.4

(MHz)

3.3

OSC

3.2

3.1

3.0

2.9

2.8

2.7

2.6

Oscillation F requency: f

2.5

(5) Supply Current vs. Ambient Temperature

(μA)

DD

Supply Current: I

V

DCOUT

=1.8V, f

=1.2MHz

OSC

40

35

V

=6.0V

IN2

30

V

=4.0V

25

IN2

20

15

10

5

0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

(μA)

DD

Supply Current: I

(6) Output Voltage vs. Ambient Temperature(7) UVLO Voltage vs. Ambient Temperature

V

=1.8V, f

2.1

2.0

(V)

1.9

DCOUT

1.8

V

OSC

IN2

=3.0MHz

=3.6V

1.8

1.5

1.2

0.9

V

DCOUT

=1.8V, f

=3.0MHz

OSC

L=1. 5μH( NR 3015) C

V

=3.6V

IN2

=4.7μF CL2=10μF

IN2

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

V

DCOUT

=1.8V, f

=3.0MHz

OSC

40

V

=6.0V

35

V

=4.0V

IN2

30

25

20

15

10

5

0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

V

DCOUT

=1.8V, f

=3.0MHz

OSC

EN2 =V

IN2

CM524

Series

1.7

1.6

Output Voltage: V

1.5

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

0.6

0.3

UVLO Voltage: UVLO (V)

0.0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

43/52

XCM524 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(8) EN "H" Voltage vs. Ambient Temperature  (9) EN" L" Voltage vs. Ambient Temperature

1.0

0.9

(V)

0.8

ENH

0.7

0.6

0.5

0.4

0.3

EN "H" Voltage: V

0.2

0.1

0.0

(10) Soft Start Time vs. Ambient Temperature

(ms)

SS

Soft Star t T ime: t

(11) "P-channel/N-channel" Driver on Resistance vs. Input Voltage

1.0

(Ω)

LxL

0.9

,R

0.8

LxH

0.7

0.6

0.5

0.4

0.3

0.2

0.1

Lx SW ON Resistance: R

0.0

V

DCOUT

=1.8V, f

V

OSC

IN2

=3.0MHz

=5.0V

V

IN2

=3.6V

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

V

=1.8V, f

DCOUT

5

=1.2MHz

OSC

L=4. 7μH( NR 4018) C

=4.7μF CL2=10μF

IN2

4

3

2

V

=3.6V

IN2

1

0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

V

DCOUT

=1.8V, f

=3.0MHz

OSC

Nch on Resistance

Pc h on Resistanc e

0123456

Input Voltage: V

IN2

(V)

V

DCOUT

=1.8V, f

=3.0MHz

OSC

1.0

0.9

0.8

(V)

0.7

ENL

V

=5.0V

IN2

0.6

0.5

0.4

0.3

0.2

EN "L" Voltage: V

V

=3.6V

IN2

0.1

0.0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

V

=1.8V, f

DCOUT

5

=3.0MHz

OSC

L=1. 5μH( NR 3015) C

4

(ms)

SS

3

2

V

=3.6V

IN2

1

Soft Start Time: t

0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

=4.7μF CL2=10μF

IN2

44/52

X

V

f

V

f

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(12) XCM524xC/ XCM524xD Series Rise Wave Form

V

=5.0V

IN2

I

=1.0mA

OUT2

V

DCOUT

(13) XCM524xC/ XCM524xD Series Soft-Start Time vs. Ambient Temperature

500

V

DCOUT

400

(μs)

SS

300

200

100

Soft Star t T ime: t

0

V I

OUT 2

-50 -25 0 25 50 75 100

(14) XCM524xC/ XCM524xD Series CL Discharge Resistance vs. Ambient Temperature

V

600

500

400

300

200

CL Discharge Resistance: Rdischg(Ω )

100

DCOUT

-50 -25 0 25 50 75 100

DCOUT

=1.2V,

L=4.7μH(NR4018) C

=1.2MHz

OSC

=4.7μF C

:0.5V/div

EN2:0.0V⇒1.0V

100μs/div

=1.2V, f

=5.0V

IN2

=1.0mA

Ambient Temperature: Ta (℃)

=3.3V, f

Ambient Temperature: Ta (℃)

=1.2MHz

OSC

L=4. 7μH( NR 4018) C

=3.0MHz

OSC

=4.7μF CL2=10μ F

IN2

VIN2=6.0V

VIN2=4.0V

=10μF

DCOUT

V

=5.0V

IN2

I

=1.0mA

OUT2

V

:1.0V/div

DCOUT

=3.3V,

L=1.5μH(NR3015) C

=3.0MHz

OSC

=4.7μF C

EN2:0.0V⇒1.0V

100μs/div

V

500

DCOUT

=3.3V, f

=3.0MHz

OSC

L=1. 5μH( NR 3015) C

IN2

400

(μs)

SS

300

200

V

=5.0V

100

Soft Star t T ime: t

I

OUT 2

IN2

=1.0mA

0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

=4.7μF CL2=10μ F

CM524

Series

=10μF

45/52

XCM524 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response

V

=1.2V, f

DCOUT

L=4.7μH(NR4018), C

=3.6V, EN2=V

V

IN2

I

=1mA → 100mA

OUT2

=1.2MHz(PWM/PFM Automatic Switching Control)

OSC

=4.7μF(ceramic), CL2=10μF(ceramic), Ta=25℃

IN2

1ch : I

OUT2

I

=1mA → 300mA

OUT2

1ch : I

OUT2

V

(50mV/div)

DCOUT

I

=100mA → 1mA

OUT2

V

(50mV/div)

DCOUT

1ch : I

2ch:

OUT2

2ch:

50μs/div

200μs/div

V

DCOUT

I

=300mA → 1mA

OUT2

V

DCOUT

2ch:

(50mV/div)

1ch : I

OUT2

2ch:

(50mV/div)

50μs/div

200μs/div

46/52

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

V

=1.2V, f

DCOUT

L=4.7μH(NR4018), C

=3.6V, EN2=V

V

IN2

I

=1mA → 100mA

OUT2

V

(50mV/div)

DCOUT

=1.2MHz (PWM Control)

OSC

=4.7μF(ceramic), CL2=10μF(ceramic), Ta=25℃

IN2

1ch : I

OUT2

2ch:

I

=1mA → 300mA

OUT2

V

(50mV/div)

DCOUT

1ch : I

OUT2

2ch:

CM524

Series

I

=100mA → 1mA

OUT2

V

DCOUT

1ch : I

OUT2

2ch:

(50mV/div)

50μs/div

200μs/div

I

=300mA → 1mA

OUT2

V

(50mV/div)

DCOUT

1ch : I

50μs/div

OUT2

2ch:

200μs/div

47/52

XCM524 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

V

=1.8V, f

DCOUT

L=1.5μH(NR3015), C

=3.6V, EN=V

V

IN2

I

=1mA → 100mA

OUT2

V

(50mV/div)

DCOUT

I

=100mA → 1mA

OUT2

V

(50mV/div)

DCOUT

=3.0MHz (PWM/PFM Automatic Switching Control)

OSC

=4.7μF(ceramic), CL2=10μF(ceramic),Ta=25℃

IN2

1ch : I

OUT2

2ch:

50μs/div

1ch : I

OUT2

2ch:

200μs/div

I

=1mA → 300mA

OUT2

V

(50mV/div)

DCOUT

I

=300mA → 1mA

OUT2

V

(50mV/div)

DCOUT

1ch : I

OUT2

2ch:

50μs/div

OUT2

2ch:

200μs/div

48/52

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

V

=1.8V, f

DCOUT

L=1.5μH(NR3015), C

=3.6V, EN2=V

V

IN2

I

=1mA → 100mA

OUT2

V

(50mV/div)

DCOUT

I

=100mA → 1mA

OUT2

V

DCOUT

(50mV/div)

=3.0MHz (PWM Control)

OSC

=4.7μF(ceramic), CL2=10μF(ceramic), Ta=25℃

IN2

1ch : I

OUT2

2ch:

1ch : I

OUT2

2ch:

50μs/div

200μs/div

I

=1mA → 300mA

OUT2

V

DCOUT

I

=300mA → 1mA

OUT2

V

(50mV/div)

DCOUT

1ch : I

OUT2

2ch:

(50mV/div)

1ch : I

OUT2

2ch:

50μs/div

200μs/div

CM524

Series

49/52

■

XCM524 Series

PACKAGING INFORMATION

●USP-12B01

2.3±0.08

MAX0.6

0.25±0.11.3±0.10.25±0.1

0.25±

0.05

●USP-12B01 Reference Pattern Layout●USP-12B01 Reference Metal Mask Design

0.95

0.55

0.65

1.05

0 .0250.025

0.30

0.25 0.15

0.25

0 . 025 0.025

0.20 0.200.50

2.8±0.08

(0.4) (0.4) (0.4) (0.4) (0.4)

(0.15) (0.25)

0.2±

0.05

0.2±

0.05

0.2±

0.05

0.2±

0.05

0.2±

0.05

123456

0.4±0.1

1.2±0.1

0.7±0.050.7±0.05

1.35

0.45 0.45

0.90

0.65 0.65

0.250.25

1.2±0.1

78912 11 10

1.35

0.90

1.30

0.35 0.35

0.95

0.55

1.30

0.95

0.55

0.250.25

0.05

0.200.05

1.60

1.30

0.95

0.55

0.10 0.10

1.30

1.60

0.25 0.15

0.150.05 0.05

0.65

1.05

0.150.15 0.40

1.55

1.10

0.60

1.10

1.55

50/52

X

■PACKAGING INFORMATION (Continued)

● USP-12B01 Power Dissipation

Power dissipation data for the USP-12B01 is shown in this page.

The value of power dissipation varies with the mount board conditions.

Please use this data as one of reference data taken in the described condition.

1. Measurement Condition (Reference data)

Condition: Mount on a board

Ambient: Natural convection

Soldering: Lead (Pb) free

Board: Dimensions 40 x 40 mm (1600 mm

st

Layer: Land and a wiring pattern

1

nd

Layer: Connecting to approximate 50% of the 1

2

rd

Layer: Connecting to approximate 50% of the 2

3

th

Layer: Noting

4

Material: Glass Epoxy (FR-4)

Thickness: 1.6 mm

Through-hole: 2 x 0.8 Diameter (each TAB needs one through-hole)

2. Power Dissipation vs. Ambient Temperature

●Only 1ch heating, Board Mount (Tj max = 125℃)

Ambient Temperature（℃） Power Dissipation Pd（mW） Thermal Resistance (℃/W)

25 800

85 320

1000

●Both 2ch heating same time, Board Mount (Tj max = 125℃)

800

600

400

200

許容損失Pd（mW）

0

25 45 65 85 105 125

Power Dissipation: Pd (mW)

Pd-Ta特性

Pd vs. Ta

Ambient Temperature: Ta (℃)

周囲温度

Ambient Temperature（℃） Power Dissipation Pd（mW） Thermal Resistance (℃/W)

25 600

85 240

許容損失Pd（mW）

Power Dissipation: Pd (mW)

1000

800

600

400

200

0

25 45 65 85 105 125

Pd-Ta特性グラフ

Pd vs. Ta

Ambient Temperature: Ta (℃)

周囲温度Ta（℃）

グラフ

Ta（℃）

2

in one side)

st

heat sink

nd

heat sink

Evaluation Board (Unit: mm)

125.00

166.67

CM524

Series

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XCM524 Series

1. The products and product specifications contained herein are subject to change without

notice to improve performance characteristics. Consult us, or our representatives

before use, to confirm that the information in this datasheet is up to date.

2. We assume no responsibility for any infringement of patents, patent rights, or other

rights arising from the use of any information and circuitry in this datasheet.

3. Please ensure suitable shipping controls (including fail-safe designs and aging

protection) are in force for equipment employing products listed in this datasheet.

4. The products in this datasheet are not developed, designed, or approved for use with

such equipment whose failure of malfunction can be reasonably expected to directly

endanger the life of, or cause significant injury to, the user.

(e.g. Atomic energy; aerospace; transport; combustion and associated safety

equipment thereof.)

5. Please use the products listed in this datasheet within the specified ranges.

Should you wish to use the products under conditions exceeding the specifications,

please consult us or our representatives.

6. We assume no responsibility for damage or loss due to abnormal use.

prior permission of TOREX SEMICONDUCTOR LTD.

52/52

TOREX XCM524 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual