Intel Silicon Intersil ISL6323B Data Sheet
Summary
This monolithic dual PWM hybrid controller is engineered for high-efficiency power management in systems utilizing AMD SVI/PVI split-plane processors. It delivers precision core voltage regulation through flexible 2- or 4-phase operation, ensuring optimal performance and component integration. This manual provides detailed technical specifications, operating guidelines, key features (like continuous DCR sensing and improved transient response), pinouts, and compliance information crucial for electronic hardware designers developing high-performance computing platforms.
Page 1 Text Content
ISL6323B
March 23, 2009 FN6879.0Data Sheet
Monolithic Dual PWM Hybrid Controller Features Powering AMD SVI Split-Plane and PVI
Processor Core Voltage Via Integrated Multi-Phase
Uniplane Processors Power Conversion
Configuration Flexibility
The ISL6323B dual PWM controller delivers high efficiency
2-Phase Operation with Internal Drivers
and tight regulation from two synchronous buck DC/DC
3- or 4-Phase Operation with External PWM Drivers
converters. The ISL6323B supports hybrid power control of AMD processors which operate from either a 6-bit parallel PSI_L Support with Phase Shedding for Improved VID interface (PVI) or a serial VID interface (SVI). The dual Efficiency at Light Load output ISL6323B features a multi-phase controller to support
Serial VID Interface Inputs
uniplane VDD core voltage and a single phase controller to
Two Wire, Clock and Data, Bus
power the Northbridge (VDDNB) in SVI mode. Only the
Conforms to AMD SVI Specifications
multi-phase controller is active in PVI mode to support
Parallel VID Interface Inputs
uniplane VDD only processors.
6-bit VID input
A precision uniplane core voltage regulation system is
0.775V to 1.55V in 25m V Steps
provided by a two-to-four-phase PWM voltage regulator (VR)
0.375V to 0.7625V in 12.5m V Steps
controller. The integration of two power MOSFET drivers,
Precision Core Voltage Regulation
adding flexibility in layout, reduce the number of external
Differential Remote Voltage Sensing
components in the multi-phase section. A single phase PWM
±0.6% System Accuracy Over-Temperature
controller with integrated driver provides a second precision
Adjustable Reference-Voltage Offset
voltage regulation system for the North Bridge portion of the
processor. This monolithic, dual controller with integrated Optimal Processor Core Voltage Transient Response driver solution provides a cost and space saving power Adaptive Phase Alignment (APA) management solution. Active Pulse Positioning Modulation Fully Differential, Continuous DCR Current Sensing
For applications which benefit from load line programming to
Accurate Load Line Programming
reduce bulk output capacitors, the ISL6323B features output
Precision Channel Current Balancing
voltage droop. The multi-phase portion also includes advanced control loop features for optimal transient Variable Gate Drive Bias: 5V to 12V response to load apply and removal. One of these features
Overcurrent Protection
is highly accurate, fully differential, continuous DCR current
Multi-tiered Overvoltage Protection
sensing for load line programming and channel current balance. Dual edge modulation is another unique feature, Selectable Switching Frequency up to 1MHz allowing for quicker initial response to high di/dt load
Simultaneous Digital Soft-Start of Both Outputs
transients.
Processor North Bridge Voltage Via Single Phase
The ISL6323B supports Power Savings Mode by dropping Power Conversion the number of phases to two when the PSI_L bit is set.
Precision Voltage Regulation Ordering Information Differential Remote Voltage Sensing ±0.6% System Accuracy Over Temperature
TEMP. PART NUMBER PART RANGE PACKAGE PKG. Serial VID Interface Inputs (Note) MARKING (°C) (Pb-free) DWG. #
Two Wire, Clock and Data, Bus
ISL6323BCRZ* ISL6323B CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 Conforms to AMD SVI Specifications ISL6323BIRZ* ISL6323B IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7
Overcurrent Protection
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel
Continuous DCR Current Sensing
specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Variable Gate Drive Bias: 5V to 12V Pb-free material sets, molding compounds/die attach materials, and
Simultaneous Digital Soft-Start of Both Outputs
100% matte tin plate plus anneal (e3 termination finish, which is Ro HS compliant and compatible with both Sn Pb and Pb-free soldering
Selectable Switching Frequency up to 1MHz
operations). Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free requirements of Pb-Free (Ro HS Compliant)
IPC/JEDEC J STD-020.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Page Summary Contents For Intel Silicon Intersil ISL6323B Data Sheet
Manual Details
| Brand | Intel |
|---|---|
| Pages | 35 |
| File Size | 836.69 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What voltage range is available for uniplane core voltage regulation?
The system supports 0.775V to 1.55V in precise 25mV steps.
How does this controller support different AMD processor types?
It can handle both a serial VID interface (SVI mode) and a parallel VID interface (PVI mode).
What specific precautions should be taken when handling the ISL6323B device?
These devices are sensitive to electrostatic discharge; proper IC Handling Procedures must be followed.