L1138 [UTC]

HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR; 高纹波抑制率低压差型高输出电流CMOS电压稳压器


型号：	L1138
厂家：	Unisonic Technologies
描述：	HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR 高纹波抑制率低压差型高输出电流CMOS电压稳压器稳压器输出元件
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UNISONIC TECHNOLOGIES CO., LTD

L1138

Preliminary

CMOS IC

HIGH RIPPLE-REJECTION AND

LOW DROPOUT HIGH OUTPUT

CURRENT CMOS VOLTAGE

REGULATOR

SOP-8

DESCRIPTION

The UTC L1138 is a positive LDO (voltage regulator) by applying

CMOS technology. It is featured as: low dropout voltage, high output

voltage accuracy, and low current consumption.

SOT-89-5

The internal circuits include low on-resistance transistor featured as a

low dropout voltage and large output current, overcurrent protector to

make sure the load current don’t exceed the current capacitance of the

output transistor, thermal shutdown circuit to make sure the heat won’t

damage the chip and ON/OFF circuit to keep the battery life longer.

In applications, the UTC L1138 can be used equipment, such as

power supplies for DVD, CD-ROM drives, battery-powered devices,

personal communication devices, and personal communication devices.

FEATURES

* Output voltage‘s high accuracy: ±1.0%

* Low dropout voltage:

120mV typ.

@3.0V output , I_OUT=300mA

80μA(Typ.)160μA max in operation

0.1μA(Typ.)1.0μA max in shutdown

mode

* Low current consumption:

* High current capability:

* With ON/OFF circuit:

800mA output

@V_IN≥V_OUT(S)+1.0V

Ensures long battery life.

* Low ESR capacitor can be used: at least a 4.7μF ceramic capacitor for

the output capacitor.

* High ripple rejection

70dB typ@1.0kHz

* With over current protector

* With thermal shutdown circuit

* Halogen Free

ORDERING INFORMATION

Ordering Number

L1138G-xx-AB5-R

L1138G-xx-S08-R

Package

SOT-89-5

SOP-8

Packing

Tape Reel

xx: Output Voltage, refer to Marking Information.

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L1138

Preliminary

CMOS IC

MARKING INFORMATION

PACKAGE

VOLTAGE CODE

MARKING

SOT-89-5

28 :2.8V

35 :3.5V

U T C

Date Code

Lot Code

L 1 1 3 8 G

SOP-8

Voltage Code

PIN CONFIGURATION

PIN DESCRIPTION

FOR SOT-89-5 Package

PIN NO.

PIN NAME

DESCRIPTION

ON/OFF

GND

Shutdown Pin

Ground Pin

3(Note)

No Connection

V_IN

Input voltage Pin

V_OUT

Output voltage Pin

Note: The NC pin is electrically open; it’s can be connected V_INand V_SS

FOR SOP-8 Package

PIN NO.

1 (Note 1)

2 (Note 1)

3 (Note 1)

PIN NAME

V_OUT

DESCRIPTION

Output voltage Pin

Ground Pin

V_OUT

GND

ON/OFF

V_IN

Shutdown Pin

6 (Note 2)

Input voltage Pin

7 (Note 2)

8 (Note 2)

V_IN

Input voltage Pin

Notes:1.Short pin 1, 2 ,3

2.Short pin 6, 7, 8

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L1138

Preliminary

CMOS IC

BLOCK DIAGRAM

V_IN

Overcurrent Protector

Thermal Shutdown

Reference

Voltage Circuit

Parasitic

diode

ON/OFF

Circuit

V_OUT

ON/OFF

V_SS

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L1138

Preliminary

CMOS IC

ABSOLUTE MAXIMUM RATING(T_a= 25°C, unless otherwise specified)

PARAMETER

SYMBOL

V_IN

RATINGS

V_SS-0.3~V_SS+7

V_SS-0.3~V_IN+0.3

Internally limited

-40~+85

UNIT

Input Voltage

V_ON/OFF

V_OUT

Output Voltage

Power Dissipation

P_D

°C

Operating Temperature

Storage Temperature

T_OPR

T_STG

-40~+125

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS (V_IN=V_OUT+1V, T_a= 25°C, unless otherwise specified)

L1138-2.8V

Parameter

SYMBOL

V_IN

TEST CONDITIONS

MIN

TYP

MAX UNIT

Input Voltage

6.5

Output Voltage (Note 1)

V_OUT(E)

ΔV_OUT1

V_IN=V_OUT(S)+1.0V, I_OUT=100mA 2.772

_OUT(S)+ 0.5V ≤V_IN≤6.5V,

_OUT= 100mA

_IN= V_OUT(S)+ 1.0 V,

1.0mA ≤I_OUT≤300mA

V_IN≤V_OUT(S)+1.0 V

_IN= V_OUT(S)+1.0 V,

ON/OFF pin = ON, no load

_IN= V_OUT(S)+ 1.0 V,

ON/OFF pin = OFF, no load

_IN= V_OUT(S)+ 1.0 V,

2.8

2.828

Line Regulation

0.05

0.3

%/V

ΔV × V_OUT

Load Regulation

ΔV_OUT2

I_OUT

100

µA

Output Current (Note 2)

800

Operation

I_SS1

160

1.0

Current Consumption

During

Shutdown

I_SS2

0.1

µA

Short-Circuit Current

Dropout Voltage

I_SHORT

V_D

350

0.15

±150

ON/OFF pin = ON, V_OUT= 0 V

V_OUT(S)=2.8V, I_OUT= 300mA

0.22

Temperature Coefficient of Output

Voltage

_IN= V_OUT(S)+1.0V,

_OUT= 10mA, -40°C≤ T_a≤85°C

T_CV_O

ppm/°C

V_OUT(S)=2.8V, V_IN= V_OUT(S)+1.0 V

f = 1.0kHz, I_OUT= 100mA

ΔV_rip= 0.5V_rms

Power Supply Rejection

PSRR

Shutdown Pin Input

Voltage

High

V_SH

V_SL

I_SH

V_IN= V_OUT(S)+1.0V

1.5

Low

V_IN= V_OUT(S)+ 1.0V

0.3

0.1

Shutdown Pin Input

Current

High

V_IN= 6.5V, V_ON/OFF= 6.5V

V_IN= 6.5V, V_ON/OFF= 0V

Junction temperature

-0.1

µA

°C

Low

Detection

I_SL

Thermal Shutdown

Temperature

T_SD

T_SR

150

120

Release

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L1138

Preliminary

CMOS IC

ELECTRICAL CHARACTERISTICS(Cont.)

L1138-3.5V

Parameter

SYMBOL

V_IN

TEST CONDITIONS

MIN

TYP MAX UNIT

Input Voltage

6.5

Output Voltage (Note 1)

V_OUT(E)

ΔV_OUT1

V_IN=V_OUT(S)+1.0V, I_OUT=100mA

_OUT(S)+ 0.5V ≤V_IN≤6.5V,

_OUT= 100mA

_IN= V_OUT(S)+ 1.0 V

1.0mA ≤I_OUT≤300mA

V_IN≤V_OUT(S)+1.0 V

_IN= V_OUT(S)+1.0 V

ON/OFF pin = ON, no load

_IN= V_OUT(S)+ 1.0 V

ON/OFF pin = OFF, no load

_IN= V_OUT(S)+ 1.0 V

3.465

3.5

3.535

Line Regulation

0.05

0.3

%/V

ΔV × V_OUT

Load Regulation

ΔV_OUT2

I_OUT

100

µA

Output Current (Note 2)

800

Operation

Shutdown

I_SS1

160

1.0

Current Consumption

During

I_SS2

0.1

µA

Short-Circuit Current

Dropout Voltage

I_SHORT

V_D

350

0.12

±150

ON/OFF pin = ON, V_OUT= 0 V

V_OUT(S)=3.5V, I_OUT= 300mA

0.18

Temperature Coefficient of Output

Voltage

_IN= V_OUT(S)+1.0V

_OUT= 10mA, -40°C≤ T_a≤85°C

T_CV_O

ppm/°C

V_OUT(S)=3.5V, V_IN= V_OUT(S)+1.0 V

f = 1.0kHz, I_OUT= 100mA

ΔV_rip= 0.5V_rms

Power Supply Rejection

PSRR

Shutdown Pin Input

Voltage

High

V_SH

V_SL

I_SH

V_IN= V_OUT(S)+1.0V

1.5

Low

V_IN= V_OUT(S)+ 1.0V

0.3

0.1

Shutdown Pin Input

Current

High

V_IN= 6.5V, V_ON/OFF= 6.5V

V_IN= 6.5V, V_ON/OFF= 0V

Junction temperature

-0.1

µA

°C

Low

Detection

I_SL

Thermal Shutdown

Temperature

T_SD

T_SR

150

120

Release

Notes: 1. V_OUT(S): Specified output voltage.

V_{OUT (E)}: Actual output voltage at the fixed load

When fixing I_OUT(= 100mA) and inputting V_OUT(S)+ 1.0 V

2. This output current means the one at which the output voltage becomes 95% of V_OUT(E)after gradually

increasing the output current.

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L1138

Preliminary

CMOS IC

OPERATION

1. Basic operation

The reference voltage (V_REF) and V_FB(the output voltage resistance-divided by feedback resistors R_Sand R_F) are

the input for the error amplifier.

V_IN

V_OUT

Current

Supply

R_F

V_REF

Error

Amplifier

Reference

Voltage

Circuit

V_FB

R_S

V_SS

2. Output transistor

A low on-resistance P-channel MOS FET is used as the output transistor. Inverse current flowing from V_OUTpin

through a parasitic diode to V_INpin can damage the regulator, so be sure that V_OUTdoes not exceed V_IN+ 0.3 V.

3. Shutdown pin (ON/OFF pin)

The shutdown pin can start and stop the regulator.The shutdown mode set by this pin can stop the operation of

all internal circuits. The structure of the ON/OFF pin is shown in Fig. 1. When the ON/OFF pin is not used, connect it

to the V_SSpin if the logic type is “A” and to the V_INpin if it is “B”.

Logic Type

ON/OFF Pin

“L”: Power on

“H”: Power off

“L”: Power off

“H”: Power on

Internal Circuits

Operating

Stopped

V_OUTPin Voltage

Set value

Current Consumption

I_SS1

I_SS2

I_SS1

V_SSlevel

Stopped

V_SSlevel

Operating

Set value

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L1138

Preliminary

CMOS IC

TEST CIRCUITS

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L1138

Preliminary

CMOS IC

TYPICAL APPLICATION CIRCUIT

Notes: C_INis a capacitor for stabilizing the input.

A ceramic capacitor of 4.7μF or more can be used for C_OUT

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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