The ISL6524A provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates one PWM controller and three linear controllers, as well as the monitoring and protection functions into a 28-pin SOIC package. The PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter. One linear controller supplies the computer system’s AGTL+ 1.2V bus power. The other two linear controllers regulate power for the 1.5V AGP bus and the 1.8V power for the chipset core voltage and/or cache memory circuits.

特性 Features

? Provides 4 Regulated Voltages

- Microprocessor Core, AGTL+ Bus, AGP Bus Power, and North/South Bridge Core

? Drives N-Channel MOSFETs

? Linear Regulator Drives Compatible with both MOSFET and Bipolar Series Pass Transistors

? Simple Single-Loop Control Design

- Voltage-Mode PWM Control

? Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifier

- Full 0 to 100 Duty Ratio

? Excellent Output Voltage Regulation

- Core PWM Output: ±1 Over Temperature

- All Other Outputs: ±3 Over Temperature

? VRM8.5 TTL-Compatible 5-Bit DAC Microprocessor Core Output Voltage Selection

- Wide Range - 1.050V to 1.825V

? Power-Good Output Voltage Monitors

- Separate delayed VTT Power Good

? Over-Voltage and Over-Current Fault Monitors

- Switching Regulator Doesn’t Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON)

? Small Converter Size

- Constant Frequency Operation

- 200kHz Internal Oscillator

? Pb-Free Available (RoHS Compliant)

Applications

? Motherboard Power Regulation for Computers