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.
Applications
• Motherboard Power Regulation for Computers
Feature
• 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
