L4957 Datasheet - STMicroelectronics

DESCRIPTION
The L4957 devices are Ultra Low Drop Output lin ear regulators with an internal N-channel MOS of 200mΩ particulary suitable for low voltage/low dropout applications. Operating with a input voltage from 3V to 6.5V they are capable to deliver up to 4A at 1.5V or 2.5V fixed output voltages.

1.5V AND 2.5V FIXED OUTPUT VOLTAGE
3V TO 6.5V INPUT VOLTAGE RANGE
200mΩ Rdson TYPICAL @ Tj = 125°C
0.6V max. DROP-OUT AT 2A
EXCELLENT LOAD REGULATION
0.6mA QUIESCENT CURRENT AT ANY LOAD
SHORT CIRCUIT PROTECTION WITH FOLD BACK
THERMAL SHUTDOWN

APPLICATIONS
MOTHER BOARDS
PROCESSOR I/O & SUPPLIES
LOW VOLTAGE MEMORY & CHIP SET SUPPLIES
GRAPHIC & SOUND CARDS
LOW VOLTAGE LOGIC SUPPLIES
POST REGULATOR FOR SMPS