Microprocessor CORE Voltage Regulator Using Multi-Phase Buck PWM Control Without Programmable Droop

The ISL6554 is the first controller in the Intersil Multi-Phase family without the programmable droop feature. The ISL6554 in combination with the HIP6601A, HIP6602A or HIP6603A companion gate drivers and Intersil MOSFETs form a complete solution for high-current, high slew-rate applications. The ISL6554 regulates output voltage, balances load currents and provides protective functions for two to four synchronous-rectified buck-converter channels.

Features
• Multi-Phase Power Conversion
• Precision Channel Current Balance
    - Lossless Current Sampling - Uses rDS(ON)
• Precision CORE Voltage Regulation
    - ±1% System Accuracy Over Temperature
    - No Programmable Droop
• Microprocessor Voltage Identification Input
    - 5-Bit VID Decoder
    - 0.95V to 1.70V in 25mV Steps
• Fast Transient Response
• Overcurrent Protection
• Selection of 2, 3, or 4 Phase Operation
• High Ripple Frequency (80kHz to 2MHz)
• Pb-Free Available (RoHS Compliant)

Applications
• Power Supply Controller for Intel® Itanium™ Processor Family
• Voltage Regulator Modules
• Servers and Workstations