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 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 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)