TOREX XC6602 User Manual

F

XC6602 Series

ETR03045-004

1A, 0.5V Low Input Voltage, High Speed LDO Regulator

■GENERAL DESCRIPTION

The XC6602 series is a low voltage input (0.5V) operation and provides high accuracy ±15mV/±20mV and can supply large

current efficiently due to its ultra low on-resistance even at low output voltages.

The series is ideally suited to the applications which require high current in low input/output voltages and consists of a Nch driver transistor, a voltage reference, an error amplifier, a current limiter, a fold-back circuit, a thermal shutdown (TSD) circuit, an under voltage lock out (UVLO) circuit, a soft-start circuit and a phase compensation circuit.

Output voltage is selectable in 0.1V increments within a range of 0.5V to 1.8V using laser trimming technology and ceramic capacitors can be used for the output stabilization capacitor (C start-up can be reduced and makes the V

The CE function enables the output to be turned off and the series to be put in stand-by mode resulting in greatly reduced power consumption. At the time of entering the stand-by mode, the series enables the electric charge at the output capacitor (C to be discharged via the internal switch. As a result the V

The CE pull-down function keeps the IC to be in stand-by mode even if the CE pin is left open.

■APPLICATIONS

● Mobile phones / Smart Phone

● Digital still cameras / Video camera

● Note PC / Tablet PC

● E-book Reader

● Wireless LAN

■ TYPICAL APPLICATION CIRCUIT

stable. The soft-start time is optimized internally.

IN

OUT

). The inrush current (I

L

) from VIN to V

RUSH

for charging CL at

OUT

pin quickly returns to the VSS level.

■FEATURES

Maximum Output Current

ON Resistance : Bias Voltage Range : Input Voltage Range : Output Voltage Range :

Output Voltage Accuracy ±0.020＠V

Ripple Rejection 75dB＠f=1kHz(V

Low Power Consumption Stand-by Current : Under-voltage Lockout : 1.8V (V Thermal Shutdown : Protection Circuit : Fold-back Current Limit, TSD, UVLO Function : Built-in Soft-start

Operating Ambient Temperature Output Capacitor : Packages : USP-6C, SOT-26W, SOT-89-5

Environmentally Friendly

:

: 1A (1.3A Limit)

0.15Ω＠V

2.5V～6.0V

0.5V～3.0V

0.5V～1.8V (0.1V increments)

:

±0.015V＠V

: 60dB＠f=1kHz (V

100μA (V

0.01μA (V

150℃＠detect, 125℃＠release

CE Pull-Down (Active High)

Auto Discharge

C

L

:

-40℃～+85℃ Ceramic Capacitor Compatible (2.2μF)

: EU RoHS Compliant, Pb Free

=3.6V,V

BIAS

＜1.2V

OUT

≧1.2V

OUT

), 6.5μA(VIN)＠V

BIAS

), 0.01μA (VIN)

BIAS

), 0.4V (VIN)

BIAS

BIAS_PSRR

IN_PSRR

■TYPICAL PERFORMANCE

BIAS

, C

BIAS=CIN

OUT

=1.0μF, CL=2.2μ

Ta=25℃

(mA)

CHARACTERISTICS

●Dropout Voltage vs. Output Current

XC6602x121MR-G

VCE=V

250

200

150

100

50

Dro pou t Voltage: Vdif(mV)

0

0 200 400 600 800 1000

VBIAS=3.3V

VBIAS=3.6V VBIAS=5.0V

Output Current: I

OUT

=1.2V

)

OUT

1/29

)

L

=1.2V

XC6602 Series

■PIN CONFIGURATION

*The dissipation pad for the USP-6C package should be solder-plated in recommended mount pattern and metal masking so as to enhance

mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the V

■PIN ASSIGNMENT

(No. 2) pin.

SS

PIN NUMBER

USP-6C SOT-26W SOT-89-5

1 6 3 V

PIN NAME FUNCTIONS

Power Supply Input

BIAS

3 4 4 VIN Driver Transistor Input

4 3 5 V

Output

OUT

5 2 - NC No Connection

2 5 2 VSS Ground

6 1 1 CE ON/OFF Control

■FUNCTION CHART

XC6602 Series, Type A/B

PIN NAME SIGNAL STATUS

L Stand-by

CE

H Active

OPEN Stand-by

■PRODUCT CLASSIFICATION

●Ordering Information

●XC6602 Series

XC6602①②③④⑤⑥-⑦

DESIGNATOR ITEM SYMBOL DESCRIPTION

①

②③ Output Voltage 05~18 e.g. 1.2V → ②=1、③=2

④ Output Voltage Accuracy 1 ±0.015V (V

⑤⑥-⑦

(*1)

The “-G” suffix denotes Halogen and Antimony free as well as being fully RoHS compliant.

(*1)

With soft-start circuit built-in, can be selected from with or without functions

Type

A Soft-start included

B Soft-start excluded

＜1.2V)、±0.020V (V

OUT

ER-G USP-6C (3,000/Reel)

Packages (Order Unit)

MR-G SOT-26W (3,000/Reel)

PR-G SOT-89-5 (1,000/Reel)

2/29

OUT

≧1.2V)

S

SS

■BLOCK DIAGRAMS

・Type A

・Type B

* Diodes inside the circuits are ESD protection diodes and parasitic diodes.

■ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL RATINGS UNITS

Bias Voltage V

Input Voltage VIN V

Output Current I

Output Voltage V

CE Input Voltage VCE V

Power Dissipation

USP-6C

SOT-26W

SOT-89-5

V

BIA

1.65

OUT

VSS-0.3～V

OUT

Pd

-0.3～VSS+6.5 V

-0.3～VSS +6.5 V

SS

-0.3～VIN+0.3≦VSS+6.5 V

V

SS

1000 ( PCB mounted )

600 ( PCB mounted )

1300 ( PCB mounted )

(*1)

A

+0.3≦VSS+6.5 V

BIAS

-0.3～VSS+6.5 V

120

250

500

(*2)

Operating Ambient Temperature Topr -40～+85 ℃

Storage Temperature

(*1) I (*2) The power dissipation measured with the test board condition is listed as reference data.

≦Pd/（VIN-V

OUT

）

Please refer to page 24～26 for details.

Ts t g - 5 5 ～+125 ℃

Ta =2 5 ℃

mW

XC6602

Series

3/29

XC6602 Series

■ELECTRICAL CHARACTERISTICS

PARAMETER SYMBOL CONDITIONS MIN TYP MAX

Bias Voltage V

Input Voltage VIN 0.5 - 3.0 V ①

Output Voltage V

Maximum Output Current

（*４）

I

Load Regulation ΔV

Dropout Voltage Vdif

Supply Current 1

(*6)

I

Supply Current 2 IIN I

Stand-by Current 1 I

Stand-by Current 2 I

Bias Line Regulation

Input Line Regulation

Bias UVLO Voltage V

Bias UVLO Release Voltage V

Input UVLO Voltage V

Input UVLO Release Voltage V

Output Voltage Temperature

Characteristics

(ΔTo pr ・V

Bias Ripple Rejection Ratio V

Input Ripple Rejection Ratio V

Limit Current

（*3）

I

Short Current I

Thermal Shutdown

Detect Temperature

Thermal Shutdown

Release Temperature

Thermal Shutdown Hysteresis Width

CLAuto-Discharge Resistance R

CE ”H” Level Voltage V

CE ”L” Level Voltage V

CE ”H” Level Current I

CE ”L” Level Current I

Soft-Start Time (Type A) Output Rise Time (Type B)

(*7)

Inrush Current (Type A)

NOTE: Unless otherwise stated, V * 1: V * 2: V * 3: Mount conditions affect heat dissipation. Maximum output current is not guaranteed when TSD starts to operate earlier. * 4: Vdif = {V V V * 5: Please refer to the table E-1 named DROPOUT VOLTAGE CHART * 6: Supply current 1 may be fluctuated because that some bias current flows into the output. * 7: A time between the CE input goes over the CE H threshold and the output reaches V

= Effective output voltage

OUT(E)

= Nominal output voltage

OUT(T)

}.

IN1-VOUT1

is an input voltage when V

IN1

is a voltage equal to 98% of the output voltage where V

OUT1

BIAS=VCE

=3.6V, VIN=V

2.5 - 6.0 V ①

BIAS

V

＜1.2V -0.015 +0.015

OUT(T)

V

≧1.2V -0.020

OUT(T)

≦1.2V

=2.5V

＞1.2V

1.0 - - A ①

V

OUT(T)

(*2)

+0.020

+1.3V

≦1A - 37 68 mV ①

OUT

=1A - E-1

OUT

=0A 76 100 143 μA ②

OUT

V

＜1.2V 0.1 - 8.7

OUT(T)

V

≧1.2V 3.9 - 14.2

OUT(T)

≦1.2V,VCE=V

≦6.0V

BIAS

＞1.2V,VCE=V

BIAS

=100mA

OUT

=3.6VDC+0.2V

+0.3VDC+0.2V

BIAS

≦6.0V

p-pAC

=OPEN

BIAS

p-pAC

- 0.01 0.10 %/V ①

- 1.28 V ①

SS

-

SS

- ±30 - ppm/℃ ①

- 60 - dB ③

- 75 - dB ③

(*5)

mV ①

0.23

×0.95 1.0 1.3 - A ①

- 90 - mA ①

OUT=VSS

130 190 255 Ω ①

- 0.41 V ④

SS

=6.0V 3.2 6.0 10.6 μA ④

=6.0V,VCE=VSS -0.1 - 0.1 μA ④

V

≦1.2V - - 70 mA ⑤

OUT（T

）

V

＞1.2V - - 85 mA ⑤

OUT（T

）

V

≦1.2V - - 155 mA ⑤

OUT（T

）

V

＞1.2V - - 215 mA ⑤

OUT（T

）

=1.0μF, CL=2.2μF

BIAS=CIN

BIAS=VCE

=3.6 and VIN=V

OUT(T)

OUT(E)

+0.3V at I

x0.9V.

=1A is input to the VIN pin.

OUT

(*1)

OUT(E)

I

=100mA

OUT

V

OUTMAX

1mA≦I

OUT

(*4)

I

BIAS

V

BIAS_STB

V

IN_STB

ΔV

/

OUT

・

V

)

(ΔV

BIAS

ΔV

(ΔV

BIAS_UVLOD

BIAS_UVLOR

IN_UVLOD

IN_UVLOR

ΔV

BIAS_PSRR

T

TSD

OUT

/

OUT

)

IN・VOUT

V

2.5 - 6.0 V ①

V

0.5 - 3.0 V ①

/

OUT

)

OUT

I

OUT

IN_PSRR

V

LIM

SHORT

T

TSD

T

TSR

- T

DCHG

CEH

CEL

V

CEH

V

CEL

I

OUT

V

Junction Temperature - 150 - ℃ ①

Junction Temperature - 125 - ℃ ①

Junction Temperature - 25 - ℃ ①

TSR

V

0.65 - 6.00 V ④

V

tSS V

tON V

BIAS=VCE

V

BIAS=VCE=VOUT(T)

=0A

OUT

=6.0V,VIN=3.0V,VCE=VSS - 0.01 0.10 μA ②

BIAS

=6.0V,VIN=3.0V,VCE=VSS - 0.01 0.15 μA ②

BIAS

V

OUT(T)

2.5V≦V

V

OUT(T)

+1.3V≦V

V

OUT(T)

+0.1V≦VIN≦3.0V - 0.01 0.10 %/V ①

V

OUT(T)

I

-40℃≦To pr ≦85℃

V

BIAS=VCE

=100mA,f=1kHz,C

V

IN=VOUT(T)

=100mA,f=1kHz,CIN=OPEN

OUT=VOUT(E)

CE=VSS,VOUT=VOUT(T)

BIAS=VCE

BIAS

=0V→3.6V,tr=5μs 225 430 600 μs ⑤

CE

=0V→3.6V,tr=5μs - - 110 μs ⑤

CE

CL=2.2μF

I

RUSH

C

=10μF

L

+0.3V, I

OUT(T)

appears at the output during decreasing input voltage gradually.

OUT1

=1mA, C

OUT

Ta =2 5 ℃

UNITS CIRCUIT

V ①

μA ②

V ①

4/29

■OUTPUT VOLTAGE CHART

E-1

NOMINAL

OUTPUT

VOLTAGE

V

OUT(T)

V

=3.0V V

BIAS

Vdif (mV) Vdif (mV) Vdif (mV) Vdif (mV) Vdif (mV)

VGS

(V)

TYP. MAX.

VGS

(V)

=3.3V V

BIAS

TYP. MAX.

0.5 2.5 152 218 2.8 3.1 3.7 4.5

0.6 2.4 2.7 3.0 3.6 4.4 155 223

0.7 2.3

146 213

2.6

0.8 2.2 158 228 2.5 152 218 2.8 3.4 4.2

0.9 2.1 162 233 2.4 2.7 3.3

155 223

1.0 2.0 165 238 2.3

1.1 1.9 167 243 2.2 158 228 2.5 152 218 3.1 3.9

1.2 1.8 169 253 2.1 162 233 2.4 3.0 3.8

1.3 1.7 179 268 2.0 165 238 2.3

1.4 1.6 189 283 1.9 167 243 2.2 158 228 2.8 3.6

1.5 1.5 202 303 1.8 169 253 2.1 162 233 2.7 3.5

1.6 1.4 213 328 1.7 179 268 2.0 165 238 2.6

1.7 1.3 225 373 1.6 189 283 1.9 167 243 2.5 152 218 3.3

1.8 1.2 255 423 1.5 202 303 1.8 169 253 2.4 155 223 3.2 146 213

* Dropout voltage is defined as the V

(=V

GS

BIAS–VOUT(E)

DROPOUT VOLTAGE (mV)

=3.6V V

BIAS

V

GS

(V)

TYP. MAX.

2.9 3.5 4.3 146 213

2.6

155 223

BIAS

V

GS

(V)

TYP. MAX.

140 208

3.2 4.0

146 213

2.9 3.7

) of the driver transistor.

=4.2V V

VGS

(V)

4.1

3.4

BIAS

TYP. MAX.

XC6602

Series

=5.0V

137 206

140 208

5/29

XC6602 Series

■OPERATIONAL EXPLANATION

The voltage divided by resistors R1 and R2 is compared with the internal reference voltage by the error amplifier. The V pin is then driven by the subsequent output signal. The output voltage at the V system of negative feedback.

V

pin is power supply pin for output voltage control circuit, protection circuit and CE circuit. Also, the V

BIAS

some current as output current. VIN pin is connected to a driver transistor and provides output current.

In order to obtain high efficient output current through low on-resistance, please take enough V driver transistor.

Figure1: XC6602 Series, Type A

<Soft-Start Function> With the XC6602 (Type A), the inrush current (I

the V

stable.

IN

) from VIN to V

RUSH

for charging CL at start-up can be reduced and makes

OUT

As for the XC6602, the soft-start time in the type A is optimized internally. On the other hand, the type B of the XC6602 does

not have the soft-start time function.

The XC6602 series includes a combination of a fixed current limiter circuit and a foldback short-circuit protection. When the

output current reaches the current limit, the output voltage drops and this operation makes the output current foldback to be decreased.

When the junction temperature of the built-in driver transistor reaches the temperature limit, the thermal shutdown circuit

operates and the driver transistor will be set to OFF. The IC resumes its operation when the thermal shutdown function is released and the IC’s operation is automatically restored because the junction temperature drops to the level of the thermal shutdown release temperature.

When the V

caused by unstable operation of the internal circuitry. When the V

pin and VIN pin voltage drops, the output driver transistor is set to OFF by UVLO function to prevent false output

BIAS

pin voltage and the VIN pin voltage rises at release

BIAS

voltage, the UVLO function is released. The driver transistor is turned ON and start to operate voltage regulation.

6/29

pin is controlled and stabilized by a

OUT

pin supplies

BIAS

GS

(=V

BIAS

– V

OUT(E)

) of the

OUT

XC6602

■OPERATIONAL EXPLANATION (Continued)

The XC6602 internal circuitry can be shutdown via the signal to the CE pin. In shutdown mode with CE low level voltage,

the V

pin will be pulled down to the V

OUT

level via CL discharge resistance (R

SS

) placed in parallel to R1 and R2.

DCHG

The CE pin has pull-down circuitry so that CE input current flows during IC operation. If the CE pin voltage is taken from

V

pin or VSS pin then logic is fixed and the IC will operate normally. However, supply current may increase as a result of

BIAS

through current in the IC's internal circuitry when medium voltage is input.

XC6602 series can quickly discharge the electric charge at the output capacitor (CL) via the internal transistor located

between the V When the IC is disabled, electric charge at the output capacitor (C Discharge time of the output capacitor (C By setting time constant of a CL auto-discharge resistance value (R

), the output voltage after discharge via the internal transistor is calculated by the following formula. Please also note

R

DCHG

R

is depended on V

DCHG

(V: Output voltage after discharge, V

τ: C

auto-discharge resistance R

L

pin and the VSS pin when a low signal to the CE pin which enables a whole IC circuit put into OFF state.

OUT

) is quickly discharged so that it could avoids malfunction.

L

. When V

BIAS

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

L

DCHG

is larger, R

BIAS

V = V

OUT(E)

: Initial Output voltage, t: Discharge time,

OUT(E)

DCHG×CL

Output capacitance

is smaller.

DCHG

-t/τ

×

e

or ｔ=τln（

) and an output capacitor value (CL) as τ(τ= CL x

V

/ V

）

OUT(E)

) and the output capacitor (CL).

DCHG

With the XC6602 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 (C

) should be connected as close to V

L

pin and VSS pin to obtain

OUT

stable phase compensation. Values required for the phase compensation are as the table below.

For a stable power input, please connect an bias capacitor (C

connect an input capacitor (C

) between the VIN pin and the VSS pin. In order to ensure the stable phase compensation

IN

while avoiding run-out of values, please use the capacitor (C much. The table below shows recommended values of C

CHART 1：

OUTPUT VOLTAGE RANGE

Recommended Values of C

BIAS, CIN, CL

(MIN.)

BIAS CAPACITOR INPUT CAPACITOR OUTPUT CAPACITOR

V

C

OUT(T)

CIN CL

BIAS

0.5V～1.8V 1.0μF 1.0μF 2.2μF

BIAS

, CIN, CL.

BIAS

) between the V

BIAS

pin and the VSS pin. Also, please

BIAS

, CIN, CL ) which does not depend on bias or temperature too

■NOTES ON USE

1. For temporary, transitional voltage drop or voltage rising phenomenon, 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. Please keep the resistance low for the V

3. Please wire the C

4. Capacitances of these capacitors (C

, CIN and CL as close to the IC as possible.

BIAS

, C

BIAS

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

5. When it is used in a quite small input / output dropout voltage, output may go into unstable operation. Please test it

thoroughly before using it in production.

6. Torex places an importance on improving our products and their reliability.

We request that users incorporate fail-safe designs and post-aging protection treatment when using Torex products in their systems

, VIN and VSS wiring in particular.

BIAS

) are decreased by the influences of bias voltage and ambient

IN, CL

Series

7/29

XC6602 Series

■TEST CIRCUITS

●Circuit ①

●Circuit ②

●Circuit ③

●Circuit ④

V

C

BIAS

1.0μF

C

IN

1.0μF

A

V

CE

V

BIAS

V

IN

OUT

V

SS

C

2.2μF

L

A

V

R

L

8/29

■TEST CIRCUITS (Continued)

●Circuit ⑤ (Timing Chart)

XC6602 Series, Type A XC6602 Series, Type B

XC6602

Series

9/29

TOREX XC6602 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual