L4949, L4949E, L4949ED, L4949ED013TR, L4949EP, L4949EP013TR

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L4949E
MULTIFUNCTION VERY LOW DROP VOLTAGE REGULATOR

OPERATING DC SUPPLY VOLTAGE RANGE 5V - 28V TRANSIENT SUPPLY VOLTAGE UP TO 40V EXTREMELY LOW QUIESCENT CURRENT IN STANDBY MODE HIGH PRECISION STANDBY OUTPUT VOLTAGE 5V 1% OUTPUT CURRENT CAPABILITY UP TO 100mA VERY LOW DROPOUT VOLTAGE LESS THAN 0.5V RESET CIRCUIT SENSING THE OUTPUT VOLTAGE PROGRAMMABLE RESET PULSE DELAY WITH EXTERNAL CAPACITOR VOLTAGE SENSE COMPARATOR THERMAL SHUTDOWN AND SHORT CIRCUIT PROTECTIONS BLOCK DIAGRAM

Minidip

SO8

SO20W (12+4+4)

ORDERING NUMBERS: L4949E (Minidip) L4949ED (SO8) L4949EP (SO20W)

DESCRIPTION The L4949E is a monolithic integrated 5V voltage regulator with a very low dropout output and additional functions as power-on reset and input voltage sense. It is designed for supplying the microcomputer controlled systems especially in automotive applications.

VZ

VOUT

CT

VS

PREREGULATOR 5V

2u +

RES

2V REG RESET VS SI SO

1.23V REF SENSE

1.23V GND

D96AT219

June 2000

1/10

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L4949 DATASHEET