DESCRIPTION

The L4992 is a sophisticated dual PWM stepdown controller and power monitor intended for Notebook computer and/or battery powered equipment. The device produces regulated +3.3V, +5.1V and 12V supplies for use in portable and PCMCIA applications.

■ DUAL PWM BUCK CONTROLLERS (3.3V and 5.1V)

■ 12V/120mA LINEAR REGULATOR

■ DUAL SYNCH RECTIFIERS DRIVERS

■ 96 EFFICIENCY ACHIEVABLE

■ 50µA (@ 12V) STAND BY CONSUMPTION

■ 5.5V TO 25V SUPPLY VOLTAGE

■ EXCELLENT LOAD TRANSIENT RESPONSE

■ DISABLE PULSE SKIPPING FUNCTION

■ POWER MANAGEMENT:

- UNDER AND OVERVOLTAGE OUTPUT DETECTION

- POWER GOOD SIGNAL

- SEPARATED DISABLE

■ THERMAL SHUTDOWN

■ PACKAGE: TQFP32