General Description

The APW7004 provides a complete control and multiple protection for a DC-DC converter optimized for high performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous-rectified buck topology. The APW7004 integrates output voltage control, output voltage programming, monitoring and protection functions into a single chip IC.

特性 Features

? Simple Single-Loop Control Design-Voltage Mode PWM Control

? Fast Transient Response

? High-Bandwidth Error Amplifier

? 5-Bit Digital-to-Analog Output Voltage Selection

? Wide Range from1.3VDC to 3.5VDC

? 0.1V Binary Steps from 2.1VDC to 3.5VDC

.05V Binary Steps from 1.3VDC to 2.05 VDC

? VID0-4 Input Pins with Pull High Resistors Built in

? Power-Good Output Voltage Monitor, PGOOD Pin with an Open Collector Configuration

? Over-Voltage and Over-Current Fault Monitors

? Uses MOSFET’s RDS(ON) as Current Sensing, No Extra Element Required

? Programmable Switching Frequency Setting

? 200kHz Free-Running Oscillator

Applications

? Power Supply for Pentium TM, Pentium ProTM, Pentium TM II,PowerPC TM, K6 TM , 6′86TM and AlphaTM Microprocessors

? High-Power 5V to 3.xV (or below) DC-DC Regulators

? Low-Voltage Distributed Power Supplies