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

- 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 Do Not Require Extra Current

Sensing Elements, Use MOSFET’s rDS(ON)

• 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