Advanced PWM and Dual Linear Power Control with Integrated ACPI Support Interface

The HIP6028 provides the power control and protection for three output voltages in high-performance microprocessor and computer applications. The IC integrates a PWM controller, a linear regulator and a linear controller as well as the monitoring and protection functions into a single package. The PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter. The linear controller regulates power for the GTL bus and the linear regulator provides power for the clock driver circuit.

FEATUREs
• Provides 3 Regulated Voltages
    - Microprocessor Core, Clock and GTL Power
• Integrated ACPI S3-State Shutdown Support
• Drives Low Cost Transistors
    - PWM Controller Drives N-MOSFETs
    - Linear Controller Compatible with Both MOSFETs and NPN Bipolar Transistors
• Operates from +3.3V, +5V and +12V Inputs
• Simple Control Design
    - Single-Loop Voltage-Mode PWM Control
    - Fixed 1.5V GTL Output Voltage
    - Fixed 2.5V Clock Output Voltage
• Fast Transient Response
    - High-Bandwidth Error Amplifier
    - Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
    - Core PWM Output: ±1% Over Temperature
    - Other Outputs: ±2.5% Over Temperature
• TTL-compatible 5-Bit Digital-to-Analog Core Output Voltage Selection
    - Wide Range . . . . . . . . . . . . . . . . . . . 1.3VDC to 3.5VDC
• Power-Good Output Voltage Monitor
• Microprocessor Core Voltage Protection Against Shorted MOSFET
• Over-Voltage and Over-Current Fault Monitors
    - Does Not Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON)
• Small Converter Size
    - Constant Frequency Operation; 200kHz Free-Running Oscillator; Programmable from 50kHz to 1MHz

APPLICATIONs
• Full Motherboard Power Regulation for Computers
• Low-Voltage Distributed Power Supplies