L4909 Datasheet

IC型號：
L4909
PDF描述：
EXTERNALLY ADJUSTABLE MULTIFUNCTION REGULATOR
文件大小：
64.26KB
PDF頁數(shù)：
7頁
芯片廠家：
STMICROELECTRONICS

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L4909

EXTERNALLY ADJUSTABLE MULTIFUNCTION REGULATOR

3 OUTPUTS

- Vo1 : output voltage variable from 5 to 12 V;

limit current : 1.2 A.

- Vo2 : output voltage variable from 5 to 12 V;

limit current : 1.2 A.

- Vo3 : output voltage variable from 5 to 12 V;

limit current : 1.2 A.

ENABLE INPUT FOR EACH REGULATOR

FEEDBACK INPUT FOR EACH REGULATOR

SHORT CIRCUIT PROTECTION TO GROUND

OVERCURRENT WARNING

DRIVER FOR EXTERNAL SCR (CROWBAR

PROTECTION)

THERMAL SHUTDOWN

Each regulator is current limited and furthermore an

OR-ed warning signal is output (open collector, ac-

tive low output) when the current in a regulator goes

above an over-current threshold (1 A typ for any reg-

ulator).

When one output voltage is higher than 20% typ of its

nominal value (for instance in case of input-to-output

short circuit), the crowbar output pin is activated, trig-

gering an external SCR (connected between input

and ground) that blows the input line fuse.

MULTIWATT 15

DESCRIPTION

It is a monolithic Multifunction Voltage Regulator; it

contains 3 regulators, (REG1, REG2, REG3) each

one with an enable input and a feedback input, to al-

low the voltage setting via external resistive divider.

BLOCK DIAGRAM

REF

THERMAL

SHUTDOWN

EN1

EN2

EN3

ENABLE

CONTROL

REFERENCE

GENERATOR

REG1

REG2

REG3

REF+20%

3,13

INA,

INB

REG1

FB1

OVER

CURRENT

CHECK

REG2

FB2

TRIG

REG3

GND

FB3

D00AU1171

May 2000

1/7

標(biāo)準(zhǔn)包裝
50
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - 線性
系列
-
穩(wěn)壓器拓?fù)浣Y(jié)構(gòu)
正，可調(diào)式
輸出電壓
5 V ~ 12 V
輸入電壓
最高 40 V
電壓 - 壓降（標(biāo)準(zhǔn)）
-
穩(wěn)壓器數(shù)量
3
電流 - 輸出
1.2A
電流 - 限制（最?。?/label>
1.2A
工作溫度
0°C ~ 70°C
安裝類型
通孔
封裝/外殼
Multiwatt-15（垂直，彎曲和錯列引線）
供應(yīng)商設(shè)備封裝
15-Multiwatt
包裝
管件

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