The ISL6323B dual PWM controller delivers high efficiency and tight regulation from two synchronous buck DC/DC converters. The ISL6323B supports hybrid power control of AMD processors which operate from either a 6-bit parallel VID interface (PVI) or a serial VID interface (SVI). The dual output ISL6323B features a multi-phase controller to support uniplane VDD core voltage and a single phase controller to
●power the Northbridge (VDDNB) in SVI mode. Only the multi-phase controller is active in PVI mode to support uniplane VDD only processors.
●_Features_
●• Processor Core Voltage Via Integrated Multi-Phase
●Power Conversion
●• Configuration Flexibility
●\- 2-Phase Operation with Internal Drivers
●\- 3- or 4-Phase Operation with External PWM Drivers
●• PSI_L Support with Phase Shedding for Improved Efficiency at Light Load
●• Serial VID Interface Inputs
●\- Two Wire, Clock and Data, Bus
●\- Conforms to AMD SVI Specifications
●• Parallel VID Interface Inputs
●\- 6-bit VID input
●\- 0.775V to 1.55V in 25mV Steps
●\- 0.375V to 0.7625V in 12.5mV Steps
●• Precision Core Voltage Regulation
●\- Differential Remote Voltage Sensing
●\- ±0.6% System Accuracy Over-Temperature
●\- Adjustable Reference-Voltage Offset
●• Optimal Processor Core Voltage Transient Response
●\- Adaptive Phase Alignment (APA)
●\- Active Pulse Positioning Modulation
●• Fully Differential, Continuous DCR Current Sensing
●\- Accurate Load Line Programming
●\- Precision Channel Current Balancing
●• Variable Gate Drive Bias: 5V to 12V
●• Overcurrent Protection
●• Multi-tiered Overvoltage Protection
●• Selectable Switching Frequency up to 1MHz
●• Simultaneous Digital Soft-Start of Both Outputs
●• Processor NorthBridge Voltage Via Single Phase
●Power Conversion
●• Precision Voltage Regulation
●\- Differential Remote Voltage Sensing
●\- ±0.6% System Accuracy Over Temperature
●• Serial VID Interface Inputs
●\- Two Wire, Clock and Data, Bus
●\- Conforms to AMD SVI Specifications
●• Overcurrent Protection
●• Continuous DCR Current Sensing
●• Variable Gate Drive Bias: 5V to 12V
●• Simultaneous Digital Soft-Start of Both Outputs
●• Selectable Switching Frequency up to 1MHz
●• Pb-Free (RoHS Compliant)
