Features

• Provides 3 Regulated Voltages

- Microprocessor Core, Clock and GTL Power

• Drives N-Channel MOSFETs

• 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

- 0.1V Steps . . . . . . . . . . . . . . . . . . . . 2.1VDC to 3.5VDC

- 0.05V Steps . . . . . . . . . . . . . . . . . . 1.3VDC to 2.05VDC

• 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 over 1MHz

Applications

• Full Motherboard Power Regulation for Computers

• Low-Voltage Distributed Power Supplies