Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications

The ISL6566 three-phase PWM control IC provides a precision voltage regulation system for advanced microprocessors. The integration of power MOSFET drivers into the controller IC marks a departure from the separate PWM controller and driver configuration of previous multiphase product families. By reducing the number of external parts, this integration is optimized for a cost and space saving power management solution.

FEATUREs
• Integrated Multi-Phase Power Conversion
    - 1, 2, or 3-Phase Operation
• Precision Core Voltage Regulation
    - Differential Remote Voltage Sensing
    - ±0.5% System Accuracy Over Temperature
    - Adjustable Reference-Voltage Offset
• Precision Channel Current Sharing
    - Uses Loss-Less rDS(ON) Current Sampling
• Accurate Load Line Programming
    - Uses Loss-Less Inductor DCR Current Sampling
• Variable Gate Drive Bias: 5V to 12V
• Microprocessor Voltage Identification Inputs
    - Up to a 6-Bit DAC
    - Selectable between Intel’s VRM9, VRM10, or AMD Hammer DAC codes
    - Dynamic VID-on-the-fly Technology
• Overcurrent Protection
• Multi-tiered Overvoltage Protection
• Digital Soft-Start
• Selectable Operation Frequency up to 1.5MHz Per Phase
• Pb-free Available