Datasheet > LT1121-5

LT1121-5

更新时间： 2024-11-21 22:55:47

品牌	Logo	应用领域
凌特 - Linear		稳压器
页数	文件大小	规格书
12页	271K
描述
Micropower Low Dropout Regulators with Shutdown

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中文翻译

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LT1121-5 数据手册

LT1121/LT1121-3.3/LT1121-5

Micropower Low Dropout

Regulators with Shutdown

DESCRIPTIO

EATURE

■

The LT1121/LT1121-3.3/LT1121-5 are micropower low

dropout regulators with shutdown. These devices are

capable of supplying 150mA of output current with a

dropout voltage of 0.4V. Designed for use in battery-

powered systems, the low quiescent current, 30µA oper-

ating and 16µA in shutdown, makes them an ideal choice.

The quiescent current is well-controlled; it does not rise in

dropout as it does with many other low dropout PNP

regulators.

0.4V Dropout Voltage

150mA Output Current

30µA Quiescent Current

No Protection Diodes Needed

Adjustable Output from 3.8V to 20V

3.3V and 5V Fixed Output Voltages

Controlled Quiescent Current in Dropout

Shutdown

16µA Quiescent Current in Shutdown

Stable with 0.33µF Output Capacitor

Reverse Battery Protection

No Reverse Current with Input Low

Thermal Limiting

Other features of the LT1121/LT1121-3.3/LT1121-5 in-

clude the ability to operate with very small output capaci-

tors. They are stable with only 0.33µF on the output while

most older devices require between 1µF and 100µF for

stability. Small ceramic capacitors can be used, enhanc-

ing manufacturability. Also the input may be connected to

ground or a reverse voltage without reverse current flow

from output to input. This makes the LT1121 series ideal

for backup power situations where the output is held high

and the input is at ground or reversed. Under these

conditions only 16µA will flow from the output pin to

ground.

O U

PPLICATI

■

Low Current Regulator

Regulator for Battery-Powered Systems

Post Regulator for Switching Supplies

TYPICAL APPLICATI

Dropout Voltage

5V Battery-Powered Supply with Shutdown

0.5

3.3V OUT

150mA

OUT

LT1121-3.3

0.4

0.3

0.2

0.1

1µF

SOLID TANTALUM

SHDN

GND

(PIN 5) OUTPUT

< 0.25

> 2.8

SHDN

OFF

LT1121 • TA01

OUTPUT CURRENT (mA)

20 40 60

100 120 140 160

LT1121 • TA02

12 3 4 5 6 7...12

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与LT1121-5相关器件

型号	品牌	获取价格	描述	数据表
LT1121-5_15	Linear	获取价格	Micropower Low Dropout Regulators with Shutdown
LT1121ACS8	Linear	获取价格	Micropower Low Dropout Regulators with Shutdown
LT1121ACS8#PBF	Linear	获取价格	LT1121 - Micropower Low Dropout Regulators with Shutdown; Package: SO; Pins: 8; Temperatur
LT1121ACS8#TR	Linear	获取价格	LT1121 - Micropower Low Dropout Regulators with Shutdown; Package: SO; Pins: 8; Temperatur
LT1121ACS8#TRPBF	Linear	获取价格	LT1121 - Micropower Low Dropout Regulators with Shutdown; Package: SO; Pins: 8; Temperatur
LT1121ACS8-3.3	Linear	获取价格	Micropower Low Dropout Regulators with Shutdown
LT1121ACS8-3.3#PBF	Linear	获取价格	LT1121 - Micropower Low Dropout Regulators with Shutdown; Package: SO; Pins: 8; Temperatur
LT1121ACS8-3.3#TR	Linear	获取价格	LT1121 - Micropower Low Dropout Regulators with Shutdown; Package: SO; Pins: 8; Temperatur
LT1121ACS8-3.3#TRPBF	Linear	获取价格	LT1121 - Micropower Low Dropout Regulators with Shutdown; Package: SO; Pins: 8; Temperatur
LT1121ACS8-5	Linear	获取价格	Micropower Low Dropout Regulators with Shutdown

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