The HIP6020A provides the power control and protection for four output voltages in high-performance, graphics intensive microprocessor and computer applications. The IC integrates two PWM controllers and two linear controllers, as well as the monitoring and protection functions into a 28-pin SOIC package. One PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter. The second PWM controller supplies the computer system’s AGP 1.5V or 3.3V bus power with a standard buck converter. The linear controllers regulate power for the 1.5V GTL bus and the 1.8V power for the North/South Bridge core voltage and/or cache memory circuits.

Features

• Provides 4 Regulated Voltages

- Microprocessor Core, AGP Bus, North/South Bridge and/or Cache Memory, and GTL Bus Power

• Drives N-Channel MOSFETs

• Linear Regulator Drives Compatible with both MOSFET and Bipolar Series Pass Transistors

• Simple Single-Loop Control Designs

- Voltage-Mode PWM Control

• Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifiers

- Full 0 to 100 Duty Ratios

• Excellent Output Voltage Regulation

- Core PWM Output: ±1 Over Temperature

- AGP Bus PWM Output: ±3 Over Temperature (1.5V Setting Only)

- Other Outputs: ±3 Over Temperature

• TTL-Compatible 5 Bit DAC Microprocessor Core Output Voltage Selection

- Wide Range - 1.3VDC to 3.5VDC

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Switching Regulators Use MOSFET’s rDS(ON) Sensing

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator; Programmable From 50kHz to Over 1MHz

- Small External Component Count

Applications

• Motherboard Power Regulation for Computers