L4992 数据手册 ( 数据表 ) - STMicroelectronics

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