L6911D

采用同步整流5位可编程降压控制器 5 BIT PROGRAMMABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION

DESCRIPTION

The device is a power supply controller specifically designed to provide a high performance DC/DC conversion for high current microprocessors. A precise 5-bit digital to analog converter DAC allows adjusting the output voltage from 1.30V to 2.05V with 50mV binary steps and from 2.10V to 3.50V with 100mV binary steps.

■OPERATING SUPPLY IC VOLTAGE FROM 5V TO 12V BUSES

■UP TO 1.3A GATE CURRENT CAPABILITY

■TTL-COMPATIBLE 5 BIT PROGRAMMABLE OUTPUT COMPLIANT WITH VRM 9.0 : 1.100V TO 1.850V WITH 0.025V BINARY STEPS

■VOLTAGE MODE PWM CONTROL

■EXCELLENT OUTPUT ACCURACY: ±1% OVER LINE AND TEMPERATURE VARIATIONS

■VERY FAST LOAD TRANSIENT RESPONSE: FROM 0% TO 100% DUTY CYCLE

■POWER GOOD OUTPUT VOLTAGE

■OVERVOLTAGE PROTECTION AND MONITOR

■OVERCURRENT PROTECTION REALIZED USING THE UPPER MOSFET"S RdsON

■200KHz INTERNAL OSCILLATOR

■OSCILLATOR EXTERNALLY ADJUSTABLE FROM 50KHz TO 1MHz

■SOFT START AND INHIBIT FUNCTIONS

APPLICATIONS

■POWER SUPPLY FOR ADVANCED MICROPROCESSOR CORE

■DISTRIBUTED POWER SUPPLY

■HIGH POWER DC-DC REGULATORS