Datasheet > LT1120AC

LT1120AC

更新时间： 2024-11-21 22:55:47

品牌	Logo	应用领域
凌特 - Linear		稳压器比较器
页数	文件大小	规格书
8页	219K
描述
Micropower Regulator with Comparator and Shutdown

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LT1120AC 数据手册

LT1120A

Micropower Regulator with

Comparator and Shutdown

FEATURES

DESCRIPTION

■

20µA Supply Current

The LT1120A is a combination micropower positive regu-

lator and free collector comparator on a single monolithic

chip. With only 20µA supply current, the LT1120A can

supply over 125mA of output current. Input voltage range

is from 4.5V to 36V and dropout voltage is 0.6V at 125mA.

Dropout voltage decreases with lower load currents. Also

included on the chip is a class B output 2.5V reference that

can either source or sink current. This allows it to be used

as a supply splitter or auxiliary output. A shutdown pin

allows logic shutdown of the output.

■

8-Lead SOIC

■

125mA Output Current

■

2.5V Reference

■

Reference Output Sources 4mA and Sinks 4mA

Open Collector

Comparator Sinks 10mA

Logic Shutdown

0.2V Dropout Voltage

■

Thermal Limiting

The comparator can be used for system or battery moni-

toring. For example, the comparator can be used to warn

of low system voltage. Frequency compensation of the

comparator for amplifier applications can be obtained by

adding external output capacitance.

APPLICATIONS

■

Battery Systems

■

Battery Backup System

■

Portable Terminals

■

Portable Instruments

■

Memory Keep Alive

TYPICAL APPLICATION

5V Regulator

Dropout Voltage and Supply Current

1.00

0.10

0.01

> 5.2V

OUT

= 20µA

LT1120A

0.001µF

GND

10µF

25µF

SHUTDOWN

1120A TA01

0.1

100

1000

OUTPUT CURRENT (mA)

1120A TA02

12 3 4 5 6 7 8

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