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 8.4 :
1.3V TO 2.05V WITH 0.05V BINARY STEPS
2.1V TO 3.5V WITH 0.1V 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