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)
