Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal

The ISL6566A 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 multi phase 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 or 2-Phase Operation with Internal Drivers
- 3-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
• 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
• Multi-tiered Overvoltage and Overcurrent Protection
• Digital Soft-Start
• Selectable Operation Frequency up to 1.5MHz Per Phase
• Pb-Free Plus Anneal Available (RoHS Compliant)