Four-Phase Buck PWM Controller with Integrated MOSFET Drivers and I2C Interface for Intel VR10, VR11, and AMD Applications

The ISL6322 four-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 Multiphase Power Conversion
  – 2-Phase or 3-Phase Operation with Internal Drivers
  – 4-Phase Operation with External PWM Driver Signal
• Precision Core Voltage Regulation
  – Differential Remote Voltage Sensing
  – ±0.5% System Accuracy Over Temperature
  – Adjustable Reference-Voltage Offset
• Optimal Transient Response
  – Active Pulse Positioning (APP) Modulation
  – Adaptive Phase Alignment (APA)
• Fully Differential, Continuous DCR Current Sensing
  – Accurate Load Line Programming
  – Precision Channel Current Balancing
• I2C Interface
  – Voltage Margining Offset
  – Switching Frequency Adjustment
  – Overvoltage Protection Level Adjustment
  – Selects Adaptive Dead Time Scheme
• User Selectable I2C “Slave Only” Device Address: 1000_110x or 1000_111x
• User Selectable Adaptive Dead Time Scheme
  – PHASE Detect or LGATE Detect for Application Flexibility
• Variable Gate Drive Bias: 5V to 12V
• Multi-Processor Compatible
  – Intel VR10 and VR11 Modes of Operation
  – AMD Mode of Operation
• Microprocessor Voltage Identification Inputs
  – 8-bit DAC
  – Selectable between Intel’s Extended VR10, VR11, AMD 5-bit, and AMD 6-bit DAC Tables
  – Dynamic VID Technology
• Overcurrent Protection
• Multi-Tiered Overvoltage Protection
• Digital Soft-Start
• Selectable Operation Frequency up to 1.5MHz Per Phase
• Pb-Free Plus Anneal Available (RoHS Compliant)