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

The ISL6312 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- 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

• 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 (RoHS Compliant)