L4989 datasheet(1/10 Pages) STMICROELECTRONICS

номер детали	L4989

подробное описание детали	LOW POWER VOLTAGE REGULATOR

PDF	10 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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L4989

March 2004

This is preliminary information on a new product now in development. Details are subject to change without notice.

■ OPERATING DC SUPPLY VOLTAGE RANGE

5.6V TO 31V

■ VERY LOW QUIESCENT CURRENT WITH

WATCHDOG DISABLED

■ PRECISION OUTPUT VOLTAGE (3%)

■ LOW-DROP VOLTAGE

(180mV typ at Io = 150mA)

■ RESET CIRCUIT SENSING THE OUTPUT

VOLTAGE DOWN TO 1V

■ PROGRAMMABLE RESET DELAY WITH

EXTERNAL CAPACITOR

■ WATCHDOG DISABLE INPUT

■ PROGRAMMABLE WATCHDOG TIMER WITH

EXTERNAL CAPACITOR

■ THERMAL SHUTDOWN AND SHORT

CIRCUIT PROTECTION

■ WIDE TEMPERATURE RANGE (Tj = -40°C TO

150°C)

ORDERING NUMBERS: L4989D (SO8)

L4989 (SO20)

SO20

SO8

PRODUCT PREVIEW

LOW POWER VOLTAGE REGULATOR

BLOCK DIAGRAMt

watchdog

Vs

Vi

Wi

Vcw

Vcr

Ctr

Ctw

Res

WE

gnd

Vo

Co

Voltage

Reference

Reset

Start up

100mV

+

_

1.25V

watchdog

Vs

Vi

Wi

Vcw

Vcr

Ctr

Ctw

Res

WE

gnd

Vo

Co

Voltage

Reference

Reset

Start up

100mV

+

_

1.25V

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