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ISL6523A - VRM8.5 Dual PWM and Dual Linear Power System Controller

General Description

VCC (Pin 28) Provide a 12V bias supply for the IC to th

Key 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 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.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ISL6523A TM Data Sheet February 2002 FN9063 VRM8.5 Dual PWM and Dual Linear Power System Controller The ISL6523A provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates two PWM controllers and two linear controllers, as well as the monitoring and protection functions into a 28-pin SOIC package. One PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter. The second PWM controller supplies the computer system’s AGTL+ 1.2V bus power with a standard buck converter. The 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. The ISL6523A includes an Intel VRM8.