TOREX XCM520 User Manual

XCM520 Series

600mA Synchronous Step-Down DC/DC Converter + Dual LDO Regulator

■GENERAL DESCRIPTION

The XCM520 series is a multi chip module which comprises of a 600mA driver transistor built-in synchronous step–down DC/DC converter and a dual CMOS LDO regulator. The device is housed in small USP-12B01 package which is ideally suited for space conscious applications.

The XCM520 can replace this dual DC/DC to eliminate one inductor and reduce output noise. The DC/DC converter with a built-in 0.42ΩP-channel MOS and a 0.52ΩN-channel MOS provides a high efficiency, stable power supply up to 600mA to using only a coil and two ceramic capacitors connected externally. The highly accurate, low noise, dual CMOS LDO regulator includes a reference voltage source, error amplifiers, driver transistors, current limiters and phase compensation circuits internally. The series is also fully compatible with low ESR ceramic capacitors. This high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response performance and high PSRR achieved across a broad range of frequencies. The EN function allows the output of each regulator to be turned off independently, resulting in greatly reduced power consumption.

■APPLICATIONS

●Close-proximity wireless transfer Module

■TYPICAL APPLICATION CIRCUIT

■FEATURES

Driver Tr ansistor : 0.42Ω P-channel MOS Built-in Switching Tran sistor : 0.52Ω N-channel MOS Built-in Input Voltage Range : 2.7V ～ 6.0V Output Voltage : 2.3V(V High Efficiency : 86% (TYP.) * Output Current : 600mA Oscillation Frequency : 3.0MHz (±15%) Soft-Start : Built-In Soft-Start

Current Limiter Circuit

Control : Fixed PWM, Auto PWM/PFM

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

: Constant Current & Latching

Maximum Output Current Dropout V oltage : 100mV @ 100mA Operating Voltage Range Output Voltages : 1.8V(V High Accuracy : ±2%(V Low Power Consumption Stand-by Current : Less than 0.1μA(TYP.) High Ripple Rejection : 70dB @1kHz Low Output Noise Operating Temperature Range Low ESR Capacitor : Ceramic Capacitor Compatible Package : USP-12B01 Standard Voltage Combinations

XCM520AA01DR-G 1.8V 1.2V 2.3V

Environmentally Friendly

:

150mA (Limiter 300mA TYP.)

: 1.5V~6.0V

: 25μA (TYP.)

: -40℃~+85℃

: EU RoHS Compliant, Pb Free

)

OUT3

),1.2V(V

OUT1

), ±30mV (V

OUT1

: V

OUT1 VOUT2 VOUT3

ETR2427-004a

)

OUT2

)

* The above circuit uses XCM520AA01DR-G. * The DC/DC block V

V

in this connection.

IN1

is connected to the dual LDO regulator

OUT3

1/32

(

XCM520 Series

■PIN CONFIGURATIOIN

VOUT2

EN2

VIN1

VIN2

PGND

1

VOUT2

VOUT1

12

VOUT1

XC6401

2

3

4

5

6

Lx

EN2

VIN

XC9235/9236

VSS

EN1

EN/MODEVIN

AGNDPGND

VOUT3Lx

TOP VIEW)

11

10

9

8

7

VSS

EN1

EN3

AGND

VOUT3

PIN No XCM520 XC6401 XC9235/XC9236

1 V

V

OUT2

―

2 EN2 EN2 ―

3 V

4 V

V

IN1

― V

IN2

―

IN

5 PGND ― PGND 6 Lx ― Lx

7 V

― V

OUT3

OUT

8 AGND ― AGND 9 EN3 ― CE

10 EN1 EN1 ―

11 VSS V

12 V

V

OUT1

―

SS

―

OUT1

12

V

T

U

O

1

V

S

E

11

E

N

1

10

N

/

3

M

D

E

O

9

8

V

A

S

7

V

U

O

T

3

*1

*2

1

V

U

O

T

2

N

2

E

3

V

I

N

1

V

I

N

2

4

V

S

D

5

L

x

6

NOTE: * The two heat-sink pads on the back side are electrically isolated in the package. *1: The pad of the regulator should be V *2: The pad of the DC/DC should be V * The DC/DC ground pin (No. 5 and 8) should be connected for use. * The two pads are recommended to open on the board, but care must be taken for

voltage level of each heat-sink pad when they are electrically connected.

TOP VIEW)

■PIN ASSIGNMENT

PIN No XCM520 FUNCTIONS

1 V

Voltage Regulator Output2

OUT2

2 EN2 Voltage Regulator ON/OFF Control 2

3 V

4 V

Voltage Regulator Power Input

IN1

DC/DC Power Input

IN2

5 PGND DC/DC Power Ground

6 Lx DC/DC Inductor Pin

7 V

DC/DC Output Voltage

OUT3

8 AGND DC/DC Analog Ground

9 EN3 DC/DC ON/OFF Control

10 EN1 Voltage Regulator ON/OFF Control 1

11 VSS Voltage Regulator Ground

12 V

Voltage Regulator Output Voltage 1

OUT1

SS

level.

SS

level.

2/32

X

p

⑦

,

⑦

)

■PRODUCT CLASSIFICATION

CM520

Series

●Ordering Information XCM520①②③④⑤⑥-⑦

DESIGNATOR DESCRIPTION SYMBOL DESCRIPTION

①② ③④

⑤⑥-⑦

(*1)

The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.

(*2)

The device orientation is fixed in its embossed tape pocket. For reverse orientation, please contact your local Torex sales office or

re

resentative. (Standard orientation: ⑤R-

Output Voltage combination

(*1)

Options

Packages

Taping Type

(*2)

－－

DR-G USP-12B01

Reverse orientation: ⑤L-

See the chart below

●DESIGNATOR①②（Combination of XC6401 series and XC9235/XC9236 series）

=3.0MHz

OSC

DESCRIPTION

①②

AA

COMBINATION OF EACH IC

XC6401FF**＋XC9235A**D

Fixed PWM, f

●DESIGNATOR③④（Output Voltage）

V

③④

01 1.8 1.2 2.3

(VR_1ch) V

OUT1

(VR_2ch) V

OUT2

OUT3

(DC/DC)

3/32

XCM520 Series

■BLOCK DIAGRAMS

* XC9235 control scheme is a fixed PWM because that the “CE/MODE Control Logic” outputs a low level signal to the “PWM/PFM Selector”.

XC9235A

XC6401FF

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

■MAXIMUM ABSOLUTE RATINGS

PAR AMETER SYMBOL RATINGS UNITS

V

Voltage V

IN1

V

Current I

OUT

V

Voltage V

OUT

EN1,EN2 Voltage V

V

Voltage V

IN2

Lx Voltage VLX -0.3～V

V

Voltage V

OUT3

EN3 Voltage V

6.5 V

IN1

OUT1+IOUT2

OUT1

EN1

*1 700

/ V

OUT2

/ V

V

EN2

-0.3～6.5 V

IN2

-0.3～6.5 V

OUT3

-0.3～6.5 V

EN3

VSS-0.3～V

*2

mA

+0.3 V

IN1

-0.3～6.5 V

SS

+0.3≦6.5 V

IN2

Lx Current ILX ±1500 mA

USP12-B01 150

OUT2

)×I

*3

OUT2

Pd

800 (1ch operate)

mW

600 (both 2ch operate)

Topr -40～+85 ℃ Tstg -55～+125 ℃

}

Power Dissipation

USP12-B01

(PCB mounted)

Operating Temperature Range

Storage Temperature Range

*1. Rating is defined as a total of VR1 and VR2 in the VR bloc.

*2. Pd > { (V

*3. The power dissipation figure shown is PCB mounted. Please refer to page 41 for details. Also, the power dissipation value above is

for each channel.

- V

)×I

+(V

IN1

OUT1

- V

IN1

4/32

X

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM520AA/AC (DC/DC BLOCK) V

OUT3

= 2.3V, f

= 3.0MHz, Ta=25℃

OSC

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage V

Operating Voltage Range V

Maximum Output Current

UVLO Voltage

Supply Current

Stand-by Current

Oscillation Frequency

PFM Switching Current

PFM Duty Limit DTY

Maximum Duty Ratio D

Minimum Duty Ratio D

Efficiency

(*2)

Lx SW "H" ON Resistance 1 Lx SW "H" ON Resistance 2

Lx SW "L" ON Resistance 1 Lx SW "L" ON Resistance 2

Lx SW "H" Leak Current

Lx SW "L" Leak Current

Current Limit

(*9)

(*5)

I I

Output Voltage

Temperature

Characteristics

(V

EN "H" Level Voltage

EN "L" Level Voltage

EN "H" Current

EN "L" Current

OUT3

2.7 - 6.0 V

IN2

I

OUT3MAX

V

UVLO

IDD

I

STB

f

OSC

I

PFM

LIMIT_PFM

MAX

MIN

EFFI

R

V

LｘH

R

V

LｘH

R

V

LｘL

R

V

LｘL

LEAKH

LEAKL

I

V

LIM

△

V

/

OUT3

・△

topr)

OUT3

V

ENH

V

EN3L

I

V

EN3H

I

V

EN3L

Soft Start Time tSS

Integral Latch Time t

Short Protection

Threshold Voltage

V

LAT

SHORT

Test conditions: Unless otherwise stated, V

When connected to external components, V

= V

IN2

= 5.0V, I

EN3

When connected to external components, V

IN2=VOUT3(E)

V

EN3

= V

IN2

+2.0V, V

, V

OUT3

EN3

= 0V ,

= 30mA

(*8)

=1.0V

Voltage which Lx pin holding “L” level

V

IN2=VEN3

= 5.0V, V

IN2

=5.0V,V

EN

OUT3=VOUT3(E)

= 0V, V

OUT3

×1.1V

= V

OUT3(E)

When connected to external components,

= V

V

IN2

OUT3(E)

+ 2.0V , V

=1.0V, V

EN3

When connected to external components, V

= V

IN2

V

= V

EN3

= V

V

IN2

= V

V

IN2

OUT3(E)

= (C-1) I

IN2

= 5.0V, V

EN3

= 5.0V, V

EN3

+ 2.0V, V

OUT3

= V

EN3

= 1mA

= V

, I

IN2

(*11)

200 300 %

OUT3 (E)

When connected to external components, V

= V

EN3

IN2

V

IN2

V

IN2

V

OUT3

-40℃ ≦ Topr ≦ 85℃

V

OUT3

＝ V

IN2

= V

= 5.0V, V

EN3

= V

= 3.6V, V

EN3

= V

=5.0V

EN3

= V

= 3.6V

EN3

= V

= 5.0V, V

OUT3

= V

= 5.0V, V

OUT3

= V

= 5.0V, V

EN3

= 30mA

=0V, Applied voltage to V

Voltage changes Lx to “H” level

V

=0V, Applied voltage to V

OUT3

Voltage changes Lx to “L” level

= V

EN3

=5.0V, V

EN3

IN2

+ 1.2V, V

OUT3 (E)

OUT3

(*4)

- 0.45 0.66 Ω －

(*4)

- 0.52 0.77 Ω －

EN3

OUT3

= 0V, V

OUT3

= 0V, ILX = 100mA

= 0V, LX= 0V - 0.01 1.0 μA ⑤ = 0V, LX= 5.0V - 0.01 1.0 μA ⑤

= V

OUT3 (E)

EN3,

(*10)

EN3,

(*10)

= 0V - 0.1 0.1 μA ⑤

= 0V - 0.1 - 0.1 μA ⑤

OUT3

When connected to external components, V

= 0V → V

EN3

V

= V

IN2

EN3

Short Lx at 1Ω resistance Sweeping 1Ω resistance,

level within 1ms

= 5.0V, V

IN2

OUT3 (E)

, V

IN2

= 5.0V,

V

OUT3

V

OUT3

,

V

=

IN2

V

voltage which Lx becomes “L”

OUT3

= Nominal voltage

= 1mA

= 0.8 × V

(*6)

V

= 5.0V,

EN3

Short Lx at

(*1, *10)

× 1.1V

= 100mA

OUT3

(*11)

= 1mA

OUT3

× 0.9V

× 1.1V

= 100mA

(*7)

(*3)

- 0.35 0.55 Ω ④

(*3)

- 0.42 0.67 Ω ④

× 0.9V 900 1050 1350 mA ⑥

OUT3 (E)

2.254 2.300 2.346 V ①

600 - - mA ①

1.00 1.40 1.78 V ②

- 46 65

- 0 1.0

2550 3000 3450 kHz ①

170 220 270 mA ①

100 - - %

- - 0 %

- 86 - % ①

- ±100 - ppm/ ℃ ①

0.65 - 6.0 V ③

VSS - 0.25 V ③

0.5 0.9 2.5 ms ①

1.0 - 20.0 ms ⑦

0.675 0.900 1.125 V ⑦

μA ③ μA ③

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

IN

*4: Design value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: Time until it short-circuits V

with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

OUT3

generating.

*7: V

OUT3 (E)

+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

- 1.2V, "L"＝+ 0.1V ～ - 0.1V

IN2～VIN2

*The electrical characteristics above are when the voltage regulator block is in stop.

CM520

Series

CIRCUIT

①

② ② ②

5/32

XCM520 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCM520 Series VR Block (VR1/VR2: EN_ Active High, without Pull-down resistors) Ta=25℃

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage V

Maximum Output Current

Load Regulation

Dropout Voltage

(*5)

Supply Current ISS V

Stand-by Current I

Input Regulation

(*8)

(△V

Input Voltage V

Output Voltage

Temperature Characteristics

Ripple Rejection

(*9)

(△Topr ･V

PSRR

Limit Current I

Short Current I

EN "H" Level Voltage V

EN "L" Level Voltage V

EN "H" Level Current I

EN "L" Level Current I

(*2)

I

OUT(E)

I

V

OUTMAX

1mA≦I

△V

OUT

Vdif1 I

Vdif2 I

V

STB

△V

/ V

OUT

・ V

IN1

△V

SHORT

ENH

)

OUT

1.5 - 6.0 V -

IN1

/

OUT

) -40℃≦Topr≦85℃

OUT

V

LIM

V

1.30 - 6 V

ENH

- - 0.25 V

ENL

V

ENL

=30mA

OUT

IN1=VOUT (T)

IN1=VEN=VOUT (T)

IN1=VOUT (T)

+1.0V≦V

OUT(T)

V

EN=VIN1

V

=[V

IN1

OUT(T)

=30mA, f=1kHz

I

OUT

IN1=VOUT (T)

IN1=VEN=VOUT (T)

= V

IN1

OUT (T)

OUT

I

OUT

+1.0]VDC+0.5Vp-pAC

NOTE:

*1 : Unless otherwise stated, V

*2 : V

(I.e. the output voltage when "V

*3 : Please see the Voltage Chart for each voltage of V

*4 : V

*5 : Vdif={V

*6 : V

*7 : V

*The electrical characteristics above are when the DC/DC block is in stop.

: Effective output voltage

OUT(E)

: Nominal output voltage

OUT(T)

(*7)

(*6)

-V

INa

OUTa

=A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VOUT(T)+1.0V} is input.

OUT1

=The input voltage when V

IN1

IN1=VOUT(T)

}

+1.0V

OUT(T)＋1.0V" is provided at the VIN pin while maintaining a certain IOUT value).

. If VOUT (T)≦1.45V, MIN VOUT (T) - 30mV, MAX VOUT (T) + 30mV

OUT(E)

appears as input voltage is gradually decreased.

OUT1

■OUTPUT VOLTAGE CHART

●Voltage Chart 1

NOMINAL OUTPUT

VOLTAGE

OUTPUT VOLTAGE (V)

CIRCUIT

(*3)

V

≧1.5V

OUT(T)

<1.5V -0.03

V

OUT(T)

X0.98

(*3)

V

OUT (T)

(*4)

+ 1.0V 150 - - mA

≦100mA

OUT

- 15 60 mV

=30mA E-1 mV

=100mA E-2 mV

+ 1.0V, I

=0mA - 25 45

OUT

+ 1.0V, VEN=VSS - 0.01 0.10

≦6.0V

IN1

, I

=30mA

OUT

=30mA

- 0.01 0.20 % / V

-

±100

- 70 - dB

+ 1.0V, VEN=V

- 300 - mA

IN1

- 30 - mA

IN1

X1.02

+0.03

(*3)

-

V

⑩

⑩ ⑩

⑩

μA ⑫ μA ⑪

⑩

ppm/℃ ⑩

⑬

⑩ ⑩ ⑭ ⑭

+ 1.0V -0.10 - 0.10

+ 1.0V, VEN=VSS -0.10 - 0.10

μA ⑭ μA ⑭

E-1 E-2

DROPOUT VOLTAGE 1 (mV) DROPOUT VOLTAGE 2 (mV)

V

Vdif1 Vdif2

V

OUT(T)

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

OUT

1.20 1.170 1.230 65 300 200 400

1.80 1.764 1.836 45 65 140 180

6/32

X

■TYPICAL APPLICATION CIRCUIT

● DC/DC BLOCK f

C

: 1μF (Ceramic)

IN1

: 1μF (Ceramic)

C

L1

: 1μF (Ceramic)

C

L2

L : 1.5μH (NR3015 TAIIYO YUDEN)

: 4.7μF (Ceramic)

C

IN2

: 10μF (Ceramic)

C

L3

■OPERATIONAL EXPLANATION

=3.0MHz

OSC

CM520

Series

●DC/DC BLOCK

The DC/DC block of the XCM520 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 switching transistor for the synchronous switch, current limiter circuit, UVLO circuit and others. (See the block diagram above.) By using the error amplifier, the voltage of the internal voltage reference source is compared with the feedback voltage from the V

pin through split resistors, R1 and R2. Phase compensation is performed on the resulting error amplifier output, to input a

OUT3

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.

7/32

XCM520 Series

■OPERATIONAL EXPLANATION (Continued)

<Current Limit> The current limiter circuit of the XCM520 series 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 P-channel MOS driver transistor is turned off, the limiter circuit is then released from the current limit detection state. ③ At the next pulse, the P-channel MOS driver transistor is turned on. However, the P-channel MOS driver 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

milliseconds and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the P-channel MOS 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 EN3 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 XCM520 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.

ILx

OUT3

V

Lx

Limit < a few milliseconds

Limit<数ms

Limit＞a few milliseconds

Limit>数ms

VEN3

VIN1

<Short-Circuit Protection> The short-circuit protection circuit monitors the internal R1 and R2 divider voltage from the V 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

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

LIM

latch the driver transistor. In latch state, the operation can be resumed by either turning the IC off and on via the EN3 pin, or by restoring power supply to the V When sharp load transient happens, a voltage drop at the V circuit protection may operate in the voltage higher than 1/2 V

IN2

pin.

pin is propagated to FB point through CFB, as a result, short

OUT3

voltage.

OUT3

<UVLO Circuit> When the V output caused by unstable operation of the internal circuitry. When the V

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

pin voltage becomes 1.8V or higher, switching

IN2

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.

pin. The suspension mode does

IN2

Current Limit LEVEL

0mA

VSS

Restart

pin. In case where output

OUT3

8/32

X

■OPERATIONAL EXPLANATION (Continued)

●Voltage Regulator BLOCK

The voltage divided by resistors R1 and R2 is compared with the internal reference voltage by the error amplifier. The P-channel MOSFETs, which are connected to the VOUT pin, are then driven by the subsequent output signal. The output voltages at the VOUT pin is controlled and stabilized by a system of negative feedback. The current limit circuit and short protect circuit operate in relation to the level of output current. Further, the IC's internal circuitry can be shutdown via the EN pin's signal.

< Low ESR Capacitors >

With the XCM520 series, a stable output voltage is achievable even if used with low ESR capacitors as a phase compensation circuit is built-in. In order to ensure the effectiveness of the phase compensation, we suggest that output capacitor (C with a capacitance value of at least 1μF. Also, please connect an input capacitor (C V

SS pin in order to ensure a stable power input.

< Current Limiter, Short-Circuit Protection >

The XCM520 series includes a combination of a fixed current limiter circuit and a fold-back circuit which aid the operations of the current limiter and circuit protection. When the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. As a result of this drop in output voltage, the fold-back circuit start to operate, output voltage drops further and output current decreases. When the output pin is shorted, a current of about 30mA flows.

< EN Pins >

The IC's internal circuitry can be shutdown via the signal from the EN pin with the XCM520 series. In shutdown state, output at the V (please refer to the selection guide). Note that as the standard type's regulator 1 and 2 are both ' High Active/No Pull Down', operations will become unstable with the EN pin open. Although the EN pin is equal to an inverter input with CMOS hysteresis, with either the pull-up or pull-down options, the EN pin input current will increase when the IC is in operation. We suggest that you use this IC with either a V specifications for the EN pin, the operational logic is fixed and the IC will operate normally. However, supply current may increase as a result of through current in the IC's internal circuitry.

) is connected as close as possible to the output pins (VOUT) and the VSS pin. Please use an output capacitor

L

OUT pin will be pulled down to the VSS level via R1 and R2. The operational logic of the IC's EN pin is selectable

IN1 voltage or a VSS voltage input at the EN pin. If this IC is used with the correct

IN1) of 1μF between the VIN1 pin and the

CM520

Series

9/32

XCM520 Series

■NOTES ON USE

1. The XCM520 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

IN2-VOUT3

L: Coil Inductance Value

f

: Oscillation Frequency

OSC

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 built-in P-channel MOS driver 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.

12. The current limit is set to 1350mA (MAX.) at typical. However, the current of 1350mA or more may flow. In case that the current limit functions while the V 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 MOS driver transistor is ON, there is almost no potential difference at both ends of the coil since the V 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 (ILIM).

②The current of ILIM or more flows since the delay time of the circuit occurs during from the detection of the current limit to

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.

)× OnDuty /(2×L×f

pin is shorted to the GND pin. Consequently, the time rate of coil current becomes quite small.

OUT3

OSC

) + I

OUT

pin is shorted to the GND pin, when P-channel MOS driver transistor is

OUT3

10/32

# ms

X

CM520

Series

■NOTE ON USE (Continued)

13. In order to stabilize V

as close as possible to the V

voltage level and oscillation frequency, we recommend that a by-pass capacitor (CIN) be connected

IN2

IN2 and VSS pins.

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 design.

CH1:Lx 5V/div

CH2:V

20mV/div

OUT3

V

OUT3

IN2

=3.3V, f

=3.7V, I

OSC

OUT3

=1.2MHz

=100mA

L : 4.7μF(NR4018)

: 4.7μF(Ceramic)

C

IN2

: 10μF(Ceramic)

C

L3

16. Please note the inductance value of the coil. The IC may enter unstable operation if the combination of ambient temperature,

output voltage, oscillation frequency, and L value are not adequate. In the operation range close to the maximum duty cycle, The IC may happen to enter unstable output voltage operation even if using the L values listed below.

CH1:Lx 2.0V/div

CH2:V

OUT3

20mV/div

V

OUT3

=4.0V,I

IN2

=3.3V, f

OSC

OUT3

=1.2MHz

=180mA

L : 1.5μF(NR3015)

C

: 4.7μF(Ceramic)

IN2

: 10μF(Ceramic)

C

L3

●The Range of L Value

f

V

OSC

3.0MHz

0.8V＜V

1.2MHz

*When a coil less value of 4.7 μ H is used at

=1.2MHz or when a coil less value of 1.5μH is used

f

OSC

=3.0MHz, peak coil current more easily reach the

at f

OSC

current limit I

. In this case, it may happen that the IC

LMI

can not provide 600mA output current.

L Value

OUT

≦4.0V 1.0μH～2.2μH

OUT3

V

≦2.5V 3.3μH～6.8μH

OUT3

2.5V＜V

4.7μH～6.8μH

OUT3

11/32

XCM520 Series

■NOTE ON USE (Continued)

●Note on use 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. The capacitor (C

When wiring impedance is high, noise propagation by output current or phase discrepancy occur which results in unstable operating. In this case, please reinforce V input capacitance C

3. With comparison to the separate product usage, the two chips are placed in adjacent in the package so heat generation

Is influenced each other. Please evaluate and verify in the actual design.

) should be connected as close as possible to the VIN and VSS pins.

IN

and VSS rails. If the operation is still unstable, please increase

IN

.

IN

●Instructions of pattern layouts

1. In order to stabilize V

C

) be connected as close as possible to the V

L3

IN1・VIN2・VOUT1・VOUT2・VOUT3

, we recommend that a by-pass capacitor (C

and VSS pin.

IN1・CIN2・CL1・CL2

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

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

4. V

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

SS

as a result of VSS voltage level fluctuation during the switching.

5. Heat is generated because of the output current (I

) and ON resistance of driver transistors.

OUT

●Reference Pattern Layout

E

X

O

T

VOUT

3

ND

A

G

O

D

E

M

EN

3

EN1

GN

D

VOUT

1

Ceramic Capacitor

セラミックコンデンサ

インダクタ

Inductor

CL3

CL1

L

IC

VOUT

Front

X

CM5

20

V

1

er..

O

USP12 B

Lx

ND G P

2 N

Cl

C

L2

2

EN2

VlN2

4

VlN1

ClN1

GND1

3

2

1

95

#

Back

・

12/32

X

■TEST CIRCUITS

< Circuit No.1 >

< Circuit No.3 >

1μF

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VOUT3

VIN1

EN2

VOUT2

< Circuit No.5 >

1μF

I

ENH

A

I

ENL

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VOUT3

VOUT2

< Circuit No.7 >

1μF

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VOUT3

VOUT2

< Circuit No.9 >

* External Components

L : 1.5μH (NR3015) 3.0MHz

4.7μH (NR4018) 1.2MHz

C

: 4.7μF (ceramic)

IN2

CL3 : 10μF (ceramic)

Lx

VIN1

EN2

Lx

VIN1

EN2

Wave Form Measure Point

Rpulldown

200Ω

I

LEAKH

A

I

LEAKL

Wave Form Measure Point

I

LAT

Rpulldown 1Ω

< Circuit No.2 >

A

1μF

< Circuit No.4 >

1μF

< Circuit No.6 >

1μF

< Circuit No.8 >

1μF

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VIN2

EN3

AGND PGND

EN1

VSS

VOUT1

VOUT3

VOUT2

VOUT3

VIN1

VOUT2

VOUT3

VIN1

EN2

VOUT2

VOUT3

VIN1

VOUT2

EN2

VIN1

EN2

Lx

CM520

Series

Lx

100mA

V

Wave Form Measure Point

I

V

LIM

I

Lx

A

13/32

A

XCM520 Series

■TEST CIRCUITS (Continued)

< Circuit No10 >

EN1/EN2

ctive High：EN = V ctive Low：EN = VSS

IN1

, C

C

< Circuit No12 > < Circuit No13 >

IN1

: 1μF (ceramic)

L1, CL2

A

VIN2

EN3

AGND PGND

VIN1

EN1

EN2

VOUT3

VOUT1

VOUT2

VSS

Lx

EN1/EN2

Active High (pull-down, without resistance)

VR1 Supply Current, EN1=ON, EN2=OFF

VR2 Supply Current, EN1= OFF, EN2=ON

Active High: ON=V

Active Low: ON=V

, OFF=VSS

IN1

OFF=V

SS,

IN1

< Circuit No14 >

C

: 1μF (ceramic)

EN1/EN2

EN1”H” Level Current

EN1=V

Level

IN1

EN2”H” Level Current

Level

EN2=V

IN1

EN1”L” Level Current

EN1= V

EN2”L” Level Current

EN2=V

* The EN which is not measured is in operation sop mode.

Active High: V

Active Low: measuring V

SS

IN1

Level

IN1

< Circuit No11 >

EN1/EN2

ctive High：EN = VSS

ctive Low：EN = V

V

=[V

(T)+1.0]VDC+0.5Vp-pAC

IN1

OUT

V

EN1/EN2

VR1 PSRR

EN1=ON, EN2=OFF

VR2 PSRR

EN1=OFF, EN2=ON

Active High: ON=V

Active Low: ON=V

IN1

A

VIN2

EN3

AGND PGND

VIN1

EN1

EN2

, OFF=VSS

IN1

, OFF=V

SS

VIN2

EN3

AGND PGND

VIN1

EN1

EN2

IN1

VOUT3

VOUT1

VOUT2

VSS

Lx

VOUT3

VOUT1

VOUT2

VSS

Lx

I

=30mA

OUT

CL1

I

=30mA

OUT

CL2

C

, CL2 : 1μF (ceramic)

L1

A

I

OUT1

V

A

I

OUT2

V

14/32

X

■TYPICAL PERFORMANCE CHARACTERISTICS

●DC/DC Block

(1) Efficiency vs. Output Current

V

=1.8V, f

OUT3

L=4.7μH(NR4018), C

100

PWM/ PFM A ut o mat i c Sw i t c hi n g

90

80

V

70

60

3.6V

IN2

= 4.2V

50

40

30

Efficency:EFFI(%)

20

10

0

0.1 1 10 100 1000

Output Current:I

(2) Output Voltage vs. Output Current

V

=1.8V, f

OUT3

L=4.7μH(NR4018), C

(V)

Output Volt age:V

2.1

2

1.9

OUT3

1.8

1.7

1.6

PWM/PF M Automat ic Switching C ontrol

1.5

0.1 1 10 100 1000

Output Current :I

(3) Ripple Voltage vs. Output Current

=1.8V, f

V

OUT3

OSC

L=4.7μH(NR4018), C

100

80

60

40

PWM Cont rol

V

4.2V,3. 6V

＝

IN2

Ripple Voltage:Vr(mV)

20

0

0.1 1 10 100 1000 Output Current:I

=1.2MHz V

OSC

=4.7μF, CL3=10μF L=1.5μH(NR3015), C

IN2

100

90

80

PWM Control

V

= 4.2V

IN2

3.6V

(mA)

OUT3

=1.2MHz V

OSC

=4.7μF, CL3=10μF L=1.5μH(NR3015), C

IN2

V

4.2V, 3.6V

＝

IN2

PWM Cont rol

(mA)

OUT3

70

60

50

40

30

Efficency:EFFI(%)

20

10

0

0.1 1 10 100 1000

2.1

2

(V)

1.9

OUT3

1.8

1.7

Output Voltage: V

1.6

1.5

0.1 1 10 100 1000

OUT3

PWM/PFM Automatic Switc hing Cont rol

V

3.6V

PWM/PFM Automatic Switchi ng C ontrol

=1.2MHz V

=4.7μF, CL3=10μF L=1.5μH(NR3015), C

IN2

100

80

PWM/PFM Automatic

Switching Control

4.2V

V

＝

IN2

3.6V

(mA)

OUT 3

60

PWM Cont rol

V

4.2V, 3.6V

＝

IN2

40

Ripple Voltage: Vr(mV)

20

0

0.1 1 10 100 1000

=1.8V, f

= 4.2V

IN2

Output Current:I

OUT3

Output Current:I

OUT3

Output Current :I

OSC

IN2

=1.8V, f

OSC

PWM C ontrol

=1.8V, f

=4.7μF, CL3=10μF

IN2

PWM/PF M Automat ic

Switching C ontrol

=3.0MHz

=4.7μF, CL3=10μF

PWM Control

V

= 4.2V

IN2

3.6V

(mA)

OUT3

=3.0MHz

=4.7μF, CL3=10μF

IN2

V

4.2V,3.6V

＝

IN2

(mA)

OUT3

=3.0MHz

OSC

V

4.2V

＝

IN2

3.6V

(mA)

OUT3

CM520

Series

15/32

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●DCDC Block (Continued)

(4) Oscillation Frequency vs. Ambient Temperature

V

=1.8V, f

OUT3

L=4.7μH(NR4018), C

1.5

1.4

(MHz)

OSC

1.3

ｆ

1.2

1.1

1

0.9

Oscillation Frequency :

0.8

-50-250 255075100

V

=3.6V

IN2

Ambient Temperature : Ta (℃)

(5) Supply Current vs. Ambient Temperature

V

=1.8V, f

OUT3

40

35

30

(μA)

DD

25

20

15

10

Supply C urrent : I

5

0

-50 -25 0 25 50 75 100

Ambient Temper ature : T a (℃)

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

V

=1.8V, f

OUT3

2.1

2

(V)

1.9

OUT3

1.8

V

=3.6V

IN 2

1.7

Output Voltage : V

1.6

1.5

-50 -25 0 25 50 75 100

Ambient Temperature : Ta (℃)

=1.2MHz V

OSC

=4.7μF, CL3=10μF L=1.5μH(NR3015), C

IN2

3.5

3.4

3.3

(MHz)

OSC

3.2

ｆ

3.1

3

2.9

2.8

2.7

2.6

Oscillation Frequency :

2.5

-50 -25 0 25 50 75 100

=1.2MHz V

OSC

40

35

30

V

=6.0V

V

IN 2

OSC

=4.0V

IN 2

=3.0MHz V

(μA)

DD

25

20

15

10

Supply C urrent : I

5

0

-50 -25 0 25 50 75 100

1.8

1.5

(V)

1.2

UVLO

0.9

0.6

UVLO Volt age : V

0.3

0

-50 -25 0 25 50 75 100

=1.8V, f

OUT3

VIN =3. 6V

Ambient Temperat ure : Ta (℃)

=1.8V, f

OUT3

V

IN2

Ambient T emperat ure : Ta (℃)

=1.8V, f

OUT3

Ambient T emperature : T a (℃)

=3.0MHz

OSC

=4.7μF, CL3=10μF

IN2

=3.0MHz

OSC

V

=6.0V

IN2

=4.0V

=3.0MHz

OSC

EN3= V

IN2

16/32

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●DCDC Block (Continued)

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

V

=1.8V, f

OUT3

1.0

0.9

(V)

0.8

ENH

EN "H" Voltage: V

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

-50 -25 0 25 50 75 100

V

=5.0V

IN2

V

Ambient Temperature: Ta (℃)

(10) Soft Start Time vs. Ambient Temperature

V

=1.8V, f

OUT3

OSC

L=4.7μH(NR4018), C

5

4

(ms)

SS

3

2

V

=3.6V

IN2

Soft Start Time : t

1

0

-50 -25 0 25 50 75 100

Ambient T emper ature : Ta (℃)

(11) "Pch / Nch" Driver on Resistance vs. Input Voltage

V

=1.8V, f

OUT3

OSC

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 0123456

Pch on Resistanc e

Input Voltage: V

=3.0MHz V

OSC

OUT3

1.0

0.9

0.8

(V)

0.7

ENL

V

IN2

0.6

0.5

0.4

IN2

=3.6V

0.3

0.2

EN "L" Voltage: V

0.1

0.0

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

=3.0MHz V

=4.7μF, CL3=10μF L=1.5μH(NR3015), C

IN2

5

4

(ms)

SS

3

2

Soft St art T ime : t

1

0

-50-25 0 25 50 75100

OUT3

V

=3.6V

IN2

Ambient Temperature : Ta (℃)

=3.0MHz

Nch on Resistance

(V)

IN2

=1.8V, f

=5.0V

V

IN2

=1.8V, f

=3.0MHz

OSC

=3.6V

=3.0MHz

OSC

=4.7μF, CL3=10μF

IN2

CM520

Series

17/32

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●DCDC Block (Continued)

(12) Load Transient Response V

=1.8V, f

OUT3

L=1.5μH(NR3015), C V

=3.6V, EN1=V

IN2

I

=1mA → 100mA I

OUT3

1ch: I

: 50mV/div V

V

OUT3

=100mA → 1mA I

I

OUT3

1ch: I

: 50mV/div V

V

OUT3

=3.0MHz(PWM Control)

OSC

=4.7μF(ceramic), CL3=10μF(ceramic), Topr=25℃

IN2

=1mA → 300mA

OUT3

1ch: I

OUT3

2ch 2ch

: 50mV/div

OUT3

50μs/div 50μs/div

=300mA → 1mA

OUT3

1ch: I

OUT3

2ch 2ch

: 50mV/div

OUT3

200μs/div 200μs/div

18/32

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block

(1) Output Voltage vs. Output Current

V

=1.8V, C

IN1

V

=0.8V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

Ta =2 5 ℃, C

1.0

0.8

(V)

OUT

0.6

0.4

Output Voltage: V

0.2

Output Voltage: V

0.0

Topr= 85℃ = 2 5 ℃

　　　 =-40℃

0 50 100 150 200 250 300 350

Output Current: I

OUT

(mA)

0.8

(V)

OUT

0.6

V

= 3.8V

　　　 = 1.8V

0.4

Output Voltage: V

0.2

Output Voltage: V

0.0 0 50 100 150 200 250 300 350

V

=2.85V

V

=3.85V, C

IN1

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

Ta =2 5 ℃, C

4.0

3.5

(V)

3.0

OUT

(V)

2.5

OUT

2.0

1.5

1.0

Output Voltage: V

0.5

0.0

Topr= 85℃ = 2 5 ℃

　　　 =-40℃

0 50 100 150 200 250 300 350

Output Current: I

OUT

(mA)

4.0

3.5

(V)

3.0

(V)

OUT

2.5

OUT

2.0

1.5

1.0

Output Voltage: V

0.5

0.0 0 50 100 150 200 250 300 350

V

=3.0V

V

=4.0V, C

IN1

4.0

3.5

(V)

3.0

(V)

OUT

2.5

OUT

2.0

1.5

1.0

Output Voltage: V

0.5

0.0

Topr= 8 5 ℃ = 2 5 ℃

　　　 =-40℃

0 50 100 150 200 250 300 350

Output C urrent: I

OUT

=1μF(ceramic), CL=1μF(ceramic)

Output Current: I

OUT

(mA)

(V)

OUT

Output Voltage: V

OUT

Ta =2 5 ℃, C

4.0

3.5

3.0

2.5

2.0 　　　 = 3.3 V

1.5

1.0

0.5

0.0

0 50 100 150 200 250 300 350

V

=0.8V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

= 6.0V

IN1

= 1.5V

Output Current: I

V

=2.85V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

V

= 6 .0 V

IN1

OUT

(mA)

= 4 .0 V

=3 .1 5 V

Output Current: I

V

=3.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

V

= 6 .0 V

IN1

OUT

(mA)

= 4 .0 V

Output Current: I

OUT

(mA)

OUT

(mA)

CM520

Series

19/32

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

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

V

=4.0V, C

IN1

6.0

5.0

(V)

OUT

4.0

OUT

3.0

Topr= 85 ℃ = 2 5 ℃

　　　 =-40℃

2.0

Output Voltage: V

1.0

Output Voltage: V

0.0 0 50 100 150 200 250 300 350

(2) Output Voltage vs. Input Voltage

Ta =2 5 ℃, C

1.2

1.1

(V)

1.0

OUT

(V)

OUT

0.9

0.8

0.7

Output Voltage: V

0.6

Output Voltage: V

0.5

0.5 1.0 1.5 2 .0 2.5

Ta =2 5 ℃, C

3.05

2.85

(V)

OUT

(V)

2.65

OUT

2.45

Output Voltage: V

2.25

Output Voltage: V

2.05

2.35 2.85 3.35

V

=5.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

Output Current: I

Output Curr ent: I

V

=0.8V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

OUT

I

OUT

(mA)

=

0mA

= 30mA

=10 0 mA

Input Voltage: V

V

=2.85V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

I

IN1

OUT

(V)

= 0 mA

= 3 0 mA

=1 0 0mA

Input Voltage: V

IN1

(V)

IN1

V

=5.0V

OUT

Ta =2 5 ℃, C

=1μF(ceramic), CL=1μF(ceramic)

IN1

6.0

5.0

(V)

OUT

4.0

3.0

V

= 6 .0 V

IN1

= 5 .3 V

2.0

Output Voltage: V

1.0

Output Voltage: V

0.0 0 50 100 150 200 250 300 350

Ta =2 5 ℃, C

Output Current: I

V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

OUT

=0.8V

OUT

(mA)

0.90

0.85

(V)

OUT

(V)

0.80

OUT

0.75

I

OUT

Output Voltage: V

0.70

Output Voltage: V

= 30mA

=100mA

0.65

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

Ta =2 5 ℃, C

Input Voltage: V

V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

=2.85V

IN1

(V)

2.95

2.90

(V)

OUT

(V)

2.85

OUT

2.80 I

=

OUT

Output Voltage: V

2.75

= 3 0mA

=100mA

2.70

3.0 3.5 4.0 4.5 5.0 5.5 6.0

Input Voltage: V

IN1

(V)

=

(V)

0mA

20/32

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

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

Ta =2 5 ℃, C

V

=3.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

3.2

3.0

(V)

OUT

(V)

2.8

OUT

2.6

Output Voltage: V

2.4

Output Voltage: V

2.2

2.5 3.0 3.5

Input Voltage: V

Ta =2 5 ℃, C

V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

5.2

5.0

(V)

OUT

4.8

4.6

Output Voltage: V

4.4

Output Voltage: V

4.2

4.5 5.0 5.5

Input Voltage: V

(3) Dropout Voltage vs. Output Current

C

V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

1.0

0.8

0.6

0.4

0.2

Dropout Voltage: Vdif(mV)

Dropout Voltage: Vdif (mV)

0.0 0 50 100 150 200

Output Current: I

Output Cur rent: I

= 3 0 mA

IN1

=5.0V

= 30mA

IN1

=0.8V

Topr = 8 5℃ 　　　 = 25℃ 　　　 = -40℃

(mA)

OUT

Ta =2 5 ℃, C

3.10

3.05

(V)

OUT

(V)

OUT

3.00

I

= 0 mA

OUT

2.95

=1 0 0mA

Output Voltage: V

2.90

Output Voltage: V

2.85

3.5 4.0 4.5 5.0 5.5 6.0

(V)

IN1

(V)

Ta =2 5 ℃, C

5.10

5.05

(V)

OUT

5.00

=

I

OUT

=1 00mA

0mA

4.95

Output Voltage: V

4.90

Output Voltage: V

4.85

5.5 6.0

(V) Input Voltage: V

IN1

(V)

C

0.5

0.4

0.3

0.2

0.1

Dropout Voltage: Vdif(mV)

Dropout Voltage: Vdif (mV)

0.0 0 50 100 150 200

(mA)

V

=3.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

I

= 0 mA

OUT

= 3 0 mA

=1 0 0 mA

Input Voltage: V

V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

=5.0V

(V)

IN1

(V)

I

OUT

= 30mA

(V)

Input Voltage: V

V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

=2.85V

(V)

Topr = 8 5 ℃ 　　　 = 2 5 ℃ 　　　 = - 4 0℃

Output Current: I

OUT

(mA)

=

0mA

=1 00mA

CM520

Series

21/32

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(3) Dropout Voltage vs. Output Current (Continued)

0.5

0.4

C

V

=3.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

0.3

0.2

0.1

Dropout Voltage: Vdif(mV)

Dropout Voltage: Vdif (mV)

0.0 0 50 100 150 200

Output Current: I

(4) Supply Current vs. Input Voltage

V

=0.8V

OUT

100

(μA)

SS

80

(μA)

SS

60

40

Supply Cullent: I

20

Supply Current: I

0

0123456

Input Voltage: V

=3.0V

V

OUT

100

(μA)

SS

80

60

40

Supply Cullent: ISS(μA)

20

Supply Current: I

0

0123456

Input Voltage: V

C

0.5

0.4

Topr＝-40℃

　　　＝25 ℃

0.3

　　　＝85 ℃

0.2

0.1

Dropout Voltage: Vdif(mV)

Dropout Voltage: Vdif (mV)

0.0 0 50 100 150 200

(mA)

OUT

(mA)

OUT

100

80

(μA)

Topr= 85℃

　　　　　 = 25℃

　　　 =-40℃

(μA)

SS

Supply Cullent: I

SS

60

40

20

Supply Current: I

0

0123456

(V) Input Voltage: V

(V)

IN1

IN

100

80

(μA)

Topr= 85℃

　　　　　 = 25℃

　　　 =-40℃

(μA)

SS

Supply Cullent: I

SS

60

40

20

Supply Current: I

0

0123456

(V)

IN1

IN

V

=5.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

Topr＝ - 4 0 ℃

　　　＝25℃ 　　　＝85℃

Output Current: I

V

=2.85V

OUT

Input Voltage: V

V

OUT

Topr= 85℃

　　　　　 = 2 5℃

　　　 =-40℃

Input Voltage: V

(mA)

OUT

Topr= 85℃

　　　　　 = 25 ℃

　　　 =-40℃

(V)

IN1

(V)

IN

=5.0V

(V)

IN1

IN

22/32

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(5) Output Voltage vs. Ambient Temperature

0.84

V

IN1

=1.8V, C

(V)

0.82

OUT

(V)

OUT

0.80

0.78

Output Voltage: V

0.76

-50 -25 0 25 50 75 100

Ambient Temperature: Ta(℃)

3.10

V

IN1

=4.0V, C

(V)

3.05

(V)

OUT

3.00

2.95

Output Voltage: V

2.90

-50 -25 0 25 50 75 100

Ambient Temperature: Ta(℃)

Ambient Temperature: Ta (℃) Ambient Temperature: Ta (℃)

(6) Supply Current vs. Ambient Temperature

30

28

(μA)

SS

26

(μA)

SS

24

Supply Cullent: I

22

Supply Current: I

20

-50 -25 0 25 50 75 100

Ambient Temperature: Ta(℃)

Ambient Temperature: Ta (℃) Ambient Temperature: Ta (℃)

V

=0.8V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

OUT

I

= 0 mA = 1 0 mA = 3 0 mA

=100mA

Ambient Temperature: Ta (℃)

V

=3.0V

OUT

=1μF(ceramic), CL=1μF(ceramic)

IN1

OUT

I

= 0 mA = 1 0 mA = 3 0 mA

=100mA

V

=0.8V

OUT

V

=1.8V

IN1

V

=2.85V

OUT

V

=4.0V, C

IN1

=1μF(ceramic), CL=1μF(ceramic)

IN1

2.95

(V)

2.90

OUT

(V)

OUT

2.85

OUT

I

= 0 mA

2.80

Output Voltage: V

= 1 0 mA = 3 0 mA =1 0 0mA

2.75

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

Ambient Temperature: Ta(℃)

V

=5.0V

OUT

V

=6.0V, C

IN1

=1μF(ceramic), CL=1μF(ceramic)

IN1

5.20

(V)

5.10

(V)

OUT

5.00

OUT

I

= 0 mA

= 1 0 mA

4.90

Output Voltage: V

= 3 0 mA

=100mA

4.80

-50 -25 0 25 50 75 100

Ambient Temperature: Ta(℃)

V

=2.85V

OUT

30

28

(μA)

SS

26

(μA)

SS

24

Supply Cullent: I

22

Supply Current: I

20

-50 -25 0 25 50 75 100

Ambient Temperature: Ta(℃)

V

IN1

CM520

Series

=3.85V

23/32

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(6) Supply Current vs. Ambient Temperature (Continued)

30

28

(μA)

SS

26

(μA)

SS

24

Supply Cullent: I

22

Supply Current: I

20

-50 -25 0 25 50 75 100

Ambient Temperature: Ta (℃)

Ambient Temperature: Ta(℃)

(7) Input Transient Response

1.00

0.95

(V)

OUT

0.90

OUT

0.85

0.80

Output Voltage: V

0.75

Output Voltage: V

0.70

tr=tf=5μs, CL=1μF(ceramic), I

Input Voltage Input Voltage

Input Voltage

Output Voltage Output Voltage

Output Voltage

Time (200μs/div) Time (40μs/div)

1.00

0.95

(V)

OUT

0.90

OUT

0.85

0.80

Output Voltage: V

0.75

Output Voltage: V

0.70

tr=tf=5μs, CL=1μF(ceramic), I

Input Voltage

Output Voltage

Time (40μs/div) Time (200μs/div)

V

=3.0V

OUT

V

=0.8V

OUT

200μs/div

=0.8V

V

OUT

Input Voltage

40μs/div

V

=100μA

OUT

=4.0V

IN1

=100mA

4

3

2

1

0

-1

-2

4

3

2

1

0

-1

-2

(μA)

Supply Current: I

(V)

OUT

IN1

IN

Input Voltage: V

Output Voltage: V

(V)

OUT

IN

OUT

IN1

Input Voltage: V

Output Voltage: V

30

28

(μA)

SS

26

SS

24

Supply Cullent: I

22

20

-50 -25 0 25 50 75 100

tr=tf=5μs, C

1.00

0.95

0.90

0.85

0.80

0.75

0.70

tr=tf=5μs, C

3.05

3.00

2.95

2.90

2.85

2.80

2.75

V

=5.0V

OUT

Ambient Temperature: Ta (℃)

Ambient Temperature: Ta(℃)

V

=0.8V

OUT

=1μF(ceramic), I

L

OUT

Input Voltage

Output Voltage

40μs/div

V

=2.85V

OUT

=1μF(ceramic), I

L

Input Voltage

Output Voltage

OUT

200μs/div

V

=100μA

=6.0V

IN1

=30mA

4

3

2

1

0

-1

-2

6

5

4

3

2

1

0

(V)

IN1

IN

Input Voltage: V

(V)

IN

(V)

IN1

Input Voltage: V

24/32

X

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(7) Input Transient Response (Continued)

3.05

3.00

(V)

OUT

(V)

2.95

OUT

2.90

2.85

Output Voltage: V

2.80

Output Voltage: V

2.75

tr=tf=5μs, CL=1μF(ceramic), I

V

=2.85V

OUT

Input Voltage

Output Voltage

Time (40μs/div) Time (40μs/div)

40μs/div

OUT

=30mA

tr=tf=5μs, CL=1μF(ceramic), I

6

5

(V)

IN

4

3

2

Input Voltage: V

1

0

3.05

3.00

(V)

OUT

2.95

OUT

IN1

2.90

2.85

Output Voltage: V

2.80

Output Voltage: V

2.75

3.20

3.15

(V)

OUT

(V) Output Voltage: V

3.10

OUT

3.05

3.00

Output Voltage: V

2.95

Output Voltage: V

2.90

tr=tf=5μs, CL=1μF(ceramic), I

V

=3.0V

OUT

Input Voltage

Output Voltage

Time (200μs/div)

200μs/div

=100μA

OUT

tr=tf=5μs, CL=1μF(ceramic), I

6

5

(V)

IN

4

(V)

3

2

Input Voltage: V

1

0

3.20

3.15

(V)

OUT

3.10

OUT

IN1

3.05

3.00

Output Voltage: V

2.95

Output Voltage: V

2.90

3.20

3.15

(V)

OUT

(V)

3.10

OUT

3.05

3.00

Output Voltage: V

2.95

tr=tf=5μs, CL=1μF(ceramic), I

2.90

V

=3.0V

OUT

=100mA tr=tf=5μs, CL=1μF(ceramic), I

OUT

6

5

Input Voltage

(V)

IN

4

(V)

IN1

3

2

Output Voltage

Input Voltage: V

1

Input Voltage: V

0

Time (40μs/div) Time (200μs/div)

40μs/div

(V)

OUT

(V)

OUT

Output Voltage: V

5.20

5.15

5.10

5.05

5.00

4.95

4.90

V

=2.85V

OUT

Input Voltage

Output Voltage

40μs/div

V

=3.0V

OUT

Input Voltage

Output Voltage

Time (40μs/div)

40μs/div

V

=5.0V

OUT

Input Voltage

Output Voltage

200μs/div

OUT

=100μA

OUT

=100mA

=30mA

6

5

4

3

2

1

0

6

5

4

3

2

1

0

8

7

6

5

4

3

2

CM520

Series

(V)

IN

(V) Input Voltage: V

IN1

Input Voltage: V

(V)

IN

(V) Input Voltage: V

IN1

Input Voltage: V

(V)

IN1

Input Voltage: VIN(V)

25/32

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(7) Input Transient Response (Continued)

5.20

5.15

(V)

OUT

(V) Output Voltage: V

5.10

OUT

5.05

5.00

Output Voltage: V

4.95

Output Voltage: V

4.90

tr=tf=5μs, CL=1μF(ceramic), I

(8) Load Transient Response

V

0.90

0.80

(V)

OUT

0.70

=1.8V, tr=tf=5μs, C

IN1

0.60

Output Voltage: V

0.50

0.40

50mA

10mA

V

2.95

=4.0V, tr=tf=5μs, C

IN1

2.85

(V)

OUT

(V)

2.75

OUT

2.65

Output Voltage: V

2.55

2.45

50mA

10mA

V

=5.0V

OUT

=30mA

OUT

(mA)

OUT

Output Current: I

(mA)

OUT

(mA)

OUT

Output Current: I

(V)

OUT

Output Voltage: V

(V)

OUT

Output Voltage: V

(V)

OUT

Output Voltage: V

5.20

5.15

5.10

5.05

5.00

4.95

4.90

0.90

0.80

0.70

0.60

0.50

0.40

2.95

2.85

2.75

2.65

2.55

2.45

8

7

Input Voltage

(V)

IN

6

(V)

IN1

5

4

Output Voltage

Input Voltage: V

3

Input Voltage: V

2

Time (40μs/div) Time (40μs/div)

40μs/div

=0.8V

V

OUT

=1μF(ceramic)

IN1=CL

250

200

Output Voltage Output Voltage

Output Voltage

150

Output Current

100

50

0

Time (40μs/div) Time (40μs/div)

40μs/div

V

=2.85V

OUT

=1μF(ceramic)

IN1=CL

250

200

Output Voltage

150

100

Output Current

50

0

Time (40μs/div) Time (40μs/div)

40μs/div

tr=tf=5μs, CL=1μF(ceramic), I

V

=1.8V, tr=tf=5μs, C

IN1

100mA

10mA

V

=4.0V, tr=tf=5μs, C

IN1

100mA

10mA

V

=5.0V

OUT

Input Voltage

Output Voltage

40μs/div

V

=0.8V

OUT

IN1=CL

Output Voltage

Output Current

40μs/div

V

=2.85V

OUT

Output Voltage

Output Current

40μs/div

IN1=CL

=100mA

OUT

=1μF(ceramic)

8

7

6

5

4

3

2

250

200

150

100

50

0

250

200

150

100

50

0

(V)

IN

(V)

IN1

Input Voltage: V

(mA)

OUT

(mA)

OUT

Output Current: I

(mA)

OUT

(mA)

OUT

Output Current: I

26/32

X

t

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(8) Load Transient Response (Continued)

(V)

OUT

(V)

OUT

3.10

3.00

2.90

V

=4.0V, tr=tf=5μs, C

IN1

2.80

Output Voltage: V

2.70

2.60

50mA

10mA

5.10

V

=6.0V, tr=tf=5μs, C

IN1

5.00

(V)

OUT

(V)

4.90

OUT

4.80

Output Voltage: V

4.70

Output Voltage: V

4.60

50mA

10mA

(9) Ripple Rejection Rate

V

=1.8VDC+0.5Vp-pAC, I

IN1

80

60

40

20

Ripple Rejection Ratio: PSRR(dB)

Ripple Rejection Ratio: PSRR (dB)

0

0.01 0.1 1 10 100

Ripple Frequency: f(kHz)

Ripple Frequency: f(kHz) Ripple Frequency: f(kHz)

V

=3.0V

OUT

=1μF(ceramic)

IN1=CL

250

Output Voltage

200

(mA)

150

OUT

(mA)

OUT

(V)

OUT

(V)

OUT

100

Output Current

50

Output Current: I

Output Voltage: V

Output Current: I

0

Time (40μs/div) Time (40μs/div)

40μs/div

V

=5.0V

OUT

=1μF(ceramic)

IN1=CL

250

Output Voltage

200

(mA)

150

(mA)

OUT

(V)

OUT

(V)

OUT

100

Output Current

50

Output Current: I

Output Voltage: V

Output Current: I

0

Time (40μs/div) Time (40μs/div)

40μs/div

V

=0.8V

OUT

=30mA, CL=1μF(ceramic)

OUT

V

=4.0V, tr=tf=5μs, C

IN1

3.10

3.00

2.90

100mA

2.80

2.70 10mA

2.60

V

=6.0V, tr=tf=5μs, C

IN1

5.10

5.00

4.90

100mA

4.80

4.70 10mA

4.60

=3.85VDC+0.5Vp-pAC, I

IN1

80

60

40

20

Ripple Rejection Ratio: PSRR(dB)

Ripple Rejection Ratio: PSRR (dB)

0

0.01 0.1 1 10 100

V

=3.0V

OUT

=1μF(ceramic)

IN1=CL

Output Voltage

Output Current

Output Curren

40μs/div

V

=5.0V

OUT

=1μF(ceramic)

IN1=CL

Output Voltage

Output Current

40μs/div

V

=2.85V

OUT

=30mA, CL=1μF(ceramic)

OUT

Ripple Frequency: f(kHz)

CM520

250

200

150

100

50

0

250

200

150

100

50

0

Series

(mA)

OUT

(mA) Output Current: I

OUT

Output Current: I

(mA)

OUT

Output Current: I

27/32

)

XCM520 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

●Regulator Block (Continued)

(9) Ripple Rejection Rate (Continued)

V

=4.0VDC+0.5Vp-pAC, I

IN1

80

60

40

20

Ripple Rejection Ratio: PSRR(dB)

Ripple Rejection Ratio: PSRR (dB)

0

0.01 0.1 1 10 100

(10) Cross Talk

3.1

(V)

OUT

(V)

OUT

3.0

2.9

2.8

Output Voltage: V

2.7

Output Voltage: V

2.6

V

VR1 Output Voltage (3.0V)

VR1 Output Voltage(3.0V

100mA

10mA

V

=3.0V

OUT

=30mA, CL=1μF(ceramic)

OUT

Ripple Frequency: f(kHz) Ripple Frequency: f(kHz)

Ripple Frequency: f(kHz)

：3.0V & V

OUT1

=4.0V, C

IN1

IN1=CL1=CL2

：2.85V

OUT2

=1μF(ceramic)

V

=5.75VDC+0.5Vp-pAC, I

IN1

80

60

40

20

Ripple Rejection Ratio: PSRR(dB)

0

Ripple Rejection Ratio: PSRR (dB)

0.01 0.1 1 10 100

V

=5.0V

OUT

=30mA, CL=1μF(ceramic)

OUT

Ripple Frequency: f(kHz)

500

400

(mA)

OUT

Output Current: I

OUT

Output Current: I

VR2 Output Voltage(2.85V)

VR2 Output Voltage (2.85V)

VR1

Output Current

300

200

100

0

Time (40μs/div)

40μs/div

28/32

X

■PACKAGING INFORMATION

●USP-12B01

2.8±0.08

CM520

Series

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

(0.15) (0.25)

0.25±

0.05

0.2±

0.05

0.2±

0.05

0.2±

0.05

0.2±

0.05

0.2±

0.05

123456

1.2±0.1

0.7±0.050.7±0.05

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

1.35

0.45 0.45

0.90

0.65 0.65

0.95

0.55

0.65

1.05

0 .0250.025

0.30

0.25 0.15

0.25

0 . 025 0.025

0.250.25

1.2±0.1

1.35

0.90

78912 11 10

UNIT: mm

1.30

0.35 0.35

0.95

0.55

0.05

1.60

1.30

0.200.05

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

1.30

0.95

0.55

0.250.25

1.55

1.10

0.60

1.10

1.55

0.20 0.200.50

0.150.15 0.40

29/32

XCM520 Series

■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℃)

2

in one side)

st

heat sink

nd

heat sink

Evaluation Board (Unit: mm)

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

25 800

125.00

85 320

Pd vs Ta

1000

800

600

400

200

0

25 45 65 85 105 125

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

Ambient TemperatureTa（℃）

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

25 600

166.67

85 240

Pd vs Ta

1000

800

600

400

200

0

25 45 65 85 105 125

Ambient Temperature Ta（℃）

30/32

X

■MARKING RULE

●USP-12B01

1 2

⑤ ⑥

① ② ③ ④

3 4

5 6

USP-12B01

CM520

Series

① represents product series

MARK PRODUCT SERIES

1 XCM520 Series

12 11

10

9 8

7

②③ represents combination of IC

MARK

② ③

A A

④ represents combination of voltage for each IC.

MARK PRODUCT SERIES

1 XCM520**01**

⑤,⑥ represents production lot number 01～09、0A～0Z、11･･･9Z、 A1～A9、AA･･･Z9、ZA～ZZ repeated (G, I, J, O, Q, W excluded) * No character inversion used.

PRODUCT SERIES

XC6401FF**＋XC9235A**D

31/32

XCM520 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.

32/32

TOREX XCM520 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual