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