Datasheet > LT1120_03

LT1120_03

更新时间： 2024-11-22 04:43:51

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
12页	185K
描述
Micropower Regulator with Comparator and Shutdown

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LT1120_03 数据手册

LT1120

Micropower Regulator with

Comparator and Shutdown

FEATURES

DESCRIPTIO

The LT^®1120 is a combination micropower positive regu-

lator and free collector comparator on a single monolithic

chip. With only 40µA supply current, the LT1120 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. A shutdown pin allows

logic shutdown of the output.

■

40µA Supply Current

■

125mA Output Current

■

2.5V Reference Voltage

■

Reference Output Sources 2mA and Sinks 2mA

■

Open Collector Comparator Sinks 10mA

■

Logic Shutdown

■

0.2V Dropout Voltage

■

Thermal Limiting

■

Available in 8-Lead DIP and SO Packages

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.

APPLICATIO S

■

Battery Systems

■

Battery-Backup System

Portable Terminals

Portable Instruments

Memory Keep-Alive

■

The 2.5V reference will source or sink current. This allows

it to be used as a supply splitter or auxiliary output.

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

Dropout Voltage and Supply Current

1.00

0.10

0.01

5V Regulator

> 5.2V

= 40µA

OUT

0.001µF

LT1120

10µF

25µF

SHDN

GND

SHUTDOWN

1120 TA01

0.1

1000

0.1

100

OUTPUT CURRENT (mA)

1120 TA02

1120fc

12 3 4 5 6 7...12

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