LR1121BL-27-AF5-A-R [UTC]

HIGH RIPPLE-REJECTION LDO REGULATOR;


型号：	LR1121BL-27-AF5-A-R
厂家：	Unisonic Technologies
描述：	HIGH RIPPLE-REJECTION LDO REGULATOR 光电二极管输出元件调节器
文件：	总6页 (文件大小：244K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

LR1121B

CMOS IC

HIGH RIPPLE-REJECTION LDO

REGULATOR



DESCRIPTION

The UTC LR1121B is CMOS-based voltage regulator ICs with

high output voltage accuracy, extremely low current, low

ON-resistance, and high Ripple Rejection.

An ON/OFF circuit enables the output to be turned off, ensuring a

long battery life. a built-in low on-resistance transistor provides a low

dropout voltage and large output current, and a built-in overcurrent

protector prevents the load current from exceeding the current

capacitance of the output transistor.

The line transient response and load transient of the UTC

LR1121B is excellent.



FEATURES

* Ultra-Low Supply Current :

During Operation: 30μA TYP.

During Standby: 0.1μA Typ.

* Output Voltage: 2.1V ~ 5.5V, Selectable in 0.1 V Steps.

* High Output Voltage Accuracy: ±2.0%

* Low Dropout Voltage: 180 mV Typ. (2.8 V Output Product, I_OUT= 100 mA)

* High Ripple Rejection: 70 dB TYP. (@ 1.0 kHz)

* High Peak Current Capability: 150 mA Output is Possible (@ V_IN≥ V_OUT(S)+ 1.0 V)



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

LR1121BL-xx-AF5-A-R

LR1121BL-xx-AF5-B-R

LR1121BG-xx-AF5-A-R

LR1121BG-xx-AF5-B-R

SOT-25

Tape Reel

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

MARKING INFORMATION

PACKAGE

VOLTAGE CODE

MARKING

21:2.1V 30:3.0V 40:4.0V 50:5.0V

22:2.2V 31:3.1V 41:4.1V 51:5.1V

23:2.3V 32:3.2V 42:4.2V 52:5.2V

24:2.4V 33:3.3V 43:4.3V 53:5.3V

25:2.5V 34:3.4V 44:4.4V 54:5.4V

26:2.6V 35:3.5V 45:4.5V 55:5.5V

27:2.7V 36:3.6V 46:4.6V

Voltage Code

SOT-25

L: Lead Free

G: Halogen Free

Pin Code

28:2.8V 37:3.7V 47:4.7V

2J:2.85V 38:3.8V 48:4.8V

29:2.9V 39:3.9V 49:4.9V



PIN DESCRIPTION

PIN NO.

SYMBOL

DESCRIPTION

V_OUT

V_SS

Output pin

GND pin

V_IN

Input pin

ON/OFF

NC*

Chip enable pin

No connection (The NC pin is electrically open or connected to V_INor V_SS.)



BLOCK DIAGRAM

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

ABSOLUTE MAXIMUM RATINGS (T_A=25°C)

PARAMETER

SYMBOL

V_IN

RATINGS

UNIT

Input Voltage

V_ON/OFF

V_OUT

P_D

0.3 ~ V_IN+0.3

-0.3 ~ V_IN+0.3

280

Output Voltage

Power Dissipation

°C

Junction Temperature

Operating Temperature

Storage Temperature

T_J

125

T_OPR

T_STG

-40 ~ +85

-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 (T_A=25°C, unless otherwise specified.)

TEST

CIRCUIT

PARAMETER

SYMBOL

V_OUT

TEST CONDITIONS

MIN

TYP MAX UNIT

V_OUT

×0.98

200

V_OUT

×1.02

Output Voltage

V_IN=V_OUT+1.0V, I_OUT=30mA

Output Current

Input Voltage

I_OUT

V_IN

V_IN≧V_OUT+1.0V

2.0

△V_OUT(LINE)

△V_IN×V_OUT

_OUT+0.5V≤V_IN≤7V

Line Regulation

Load Regulation

Supply Current

0.04

0.2

%/V

_OUT=30mA

V_IN=V_OUT+1.0V

1.0mA≤I_OUT≤80mA

△V_OUT(LOAD)

I_SS1

V_IN=V_OUT+1.0V, ON/OFF

pin=ON, no load

μA

Supply Current During

standby

V_IN=V_OUT+1.0V, ON/OFF

pin=OFF, no load

I_SS2

0.1

230

1.0

V_IN=V_OUT+1.0V, ON/OFF

pin=ON, V_OUT=0V

Short Circuit Current

I_SHORT

Shutdown Pin Input

Voltage

High

Low

High

Low

V_SH

V_SL

I_SH

V_IN=V_OUT+1.0V, R_L=10KΩ

V_IN=7V, V_ON/OFF= V_IN

V_IN=7V, V_ON/OFF= V_SS

V_IN=V_OUT+1.0V, f=1.0kHz

Ripple 0.5Vp-p

1.6

V_IN

0.3

0.1

Shutdown Pin Input

Current

-0.1

μA

I_SL

Ripple Rejection



ELECTRICAL CHARACTERISTICS OF DROPOUT VOLTAGE (T_A=25°C)

V_D(Dropout Voltage)

Output Voltage, V_OUT(V)

Condition

MIN

TYP

0.22

0.20

0.18

0.15

MAX

0.70

0.35

0.30

0.26

UNIT

2.1V≤V_OUT(S)≤2.4V

2.5V≤V_OUT(S)≤2.7V

2.8V≤V_OUT(S)≤3.3V

3.4V≤V_OUT(S)≤5.5V

_OUT=100mA

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LR1121B

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TEST CIRCUIT

Note:

Input capacitor (C_IN): 1.0 μF or more

Output capacitor (C_L): 2.2μF or more (tantalum capacitor)



SELECTION OF OUTPUT CAPACITOR (C_L)

In this IC, phase compensation and the output capacitor is made for securing stable operation even if the load

current is varied. Therefore, always place a capacitor (C_L) of 2.2 μF or more between V_OUTand V_SSpins. Using a

capacitor whose ESR is outside the optimum range (approximately 0.5 ~ 5Ω), whether larger or smaller, may cause

an unstable output, resulting in oscillation. For this reason, a tantalum electrolytic capacitor is recommended.

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TYPICAL APPLICATION CIRCUIT

Note:

Input capacitor (C_IN): 1.0 μF or more

Output capacitor (C_L): 2.2μF or more (tantalum capacitor)

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TYPICAL CHARACTERISTICS

Dropout voltage vs. Output current

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. UTC reserves the right to

make changes to information published in this document, including without limitation specifications and

product descriptions, at any time and without notice. This document supersedes and replaces all

information supplied prior to the publication hereof.

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