L4949E

多功能非常低的压差电压稳压器 MULTIFUNCTION VERY LOW DROP VOLTAGE REGULATOR

DESCRIPTION

The 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.

■ 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