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.

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