ISL6323B Monolithic Dual PWM Hybrid Controller Powering AMD SVI Split-Plane and PVI Uniplane Processors

VIN (min) (V)	5
VIN (max) (V)	12
VOUT (min) (V)	0
VOUT (max) (V)	2
IOUT (max) (A)	120

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

A precision uniplane core voltage regulation system is provided by a two-to-four-phase PWM voltage regulator (VR) controller. The integration of two power MOSFET drivers, adding flexibility in layout, reduce the number of external components in the multi-phase section. A single phase PWM controller with integrated driver provides a second precision voltage regulation system for the North Bridge portion of the processor. This monolithic, dual controller with integrated driver solution provides a cost and space saving power management solution.

For applications which benefit from load line programming to reduce bulk output capacitors, the ISL6323B features output voltage droop. The multi-phase portion also includes advanced control loop features for optimal transient response to load apply and removal. One of these features is highly accurate, fully differential, continuous DCR current sensing for load line programming and channel current balance. Dual edge modulation is another unique feature, allowing for quicker initial response to high di/dt load transients.

The ISL6323B supports Power Savings Mode by dropping the number of phases to two when the PSI_L bit is set.

ISL6323B 特点

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)

ISL6323B 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ISL6323BCRZ	量产	民用级	48 Ld QFN	3	2.50
ISL6323BCRZ-T	量产	民用级	48 Ld QFN T+R	3	2.50
ISL6323BIRZ	量产	工业级	48 Ld QFN	3	3.22
ISL6323BIRZ-T	量产	工业级	48 Ld QFN T+R	3	3.22