ISL6323 Datasheet, PDF (1/34 Pages) Intersil Corporation – Hybrid SVI/PVI

®
Data Sheet
April 7, 2008
ISL6323
Hybrid SVI/PVI
FN9278.2
Monolithic Dual PWM Hybrid Controller
Powering AMD SVI Split-Plane and PVI
Uniplane Processors
The ISL6323 dual PWM controller delivers high efficiency
and tight regulation from two synchronous buck DC/DC
converters. The ISL6323 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 ISL6323 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 ISL6323 features output
voltage droop. The multi-phase portion also includes
advanced control loop features for optimal transient response
to load application 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.
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL6323CRZ* ISL6323 CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7
ISL6323IRZ* ISL6323 IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is RoHS compliant and compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
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
• 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
- ±0.5% 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
- ±0.5% 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)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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