ISL6322 INTERSIL [Intersil Corporation], ISL6322 Datasheet

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ISL6322

Manufacturer Part Number
ISL6322
Description
Four-Phase Buck PWM Controller with Integrated MOSFET Drivers and I2C Interface for Intel VR10, VR11, and AMD Applications
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet

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Four-Phase Buck PWM Controller with
Integrated MOSFET Drivers and I
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.
One outstanding feature of this controller IC is its
multi-processor compatibility, allowing it to work with both Intel
and AMD microprocessors. Included are programmable VID
codes for Intel VR10, VR11, as well as AMD DAC tables. A
unity gain, differential amplifier is provided for remote voltage
sensing, compensating for any potential difference between
remote and local grounds. The output voltage can also be
positively or negatively offset through the use of a single
external resistor.
The ISL6322 includes an I
controller to communicate with other devices over an I
bus. Signals sent over this bus can command the ISL6322 to
adjust voltage margining offset, converter switching
frequency, and overvoltage protection levels, and can select
the integrated driver adaptive dead time scheme.
The ISL6322 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. Active Pulse Positioning (APP)
modulation is another unique feature, allowing for quicker
initial response to high di/dt load transients.
This controller also allows the user the flexibility to choose
between PHASE detect or LGATE detect adaptive dead time
schemes. This ability allows the ISL6322 to be used in a
multitude of applications where either scheme is required.
Protection features of this controller IC include a set of
sophisticated overvoltage, undervoltage, and overcurrent
protection. Furthermore, the ISL6322 includes protection
against an open circuit on the remote sensing inputs.
Combined, these features provide advanced protection for the
microprocessor and power system.
2
®
C interface, allowing the
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Data Sheet
2
C
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1-888-INTERSIL or 1-888-468-3774
C
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Integrated Multiphase Power Conversion
• Precision Core Voltage Regulation
• Optimal Transient Response
• Fully Differential, Continuous DCR Current Sensing
• I
• User Selectable I
• User Selectable Adaptive Dead Time Scheme
• Variable Gate Drive Bias: 5V to 12V
• Multi-Processor Compatible
• Microprocessor Voltage Identification Inputs
• 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)
- 2 or 3-Phase Operation with Internal Drivers
- 4-Phase Operation with External PWM Driver Signal
- Differential Remote Voltage Sensing
- ±0.5% System Accuracy Over Temperature
- Adjustable Reference-Voltage Offset
- Active Pulse Positioning (APP) Modulation
- Adaptive Phase Alignment (APA)
- Accurate Load Line Programming
- Precision Channel Current Balancing
- Voltage Margining Offset
- Switching Frequency Adjustment
- Overvoltage Protection Level Adjustment
- Selects Adaptive Dead Time Scheme
1000_110x or 1000_111x
- PHASE Detect or LGATE Detect for Application
- Intel VR10 and VR11 Modes of Operation
- AMD Mode of Operation
- 8-Bit DAC
- Selectable between Intel’s Extended VR10, VR11, AMD
- Dynamic VID Technology
2
C Interface
Flexibility
5-bit, and AMD 6-bit DAC Tables
August 21, 2006
All other trademarks mentioned are the property of their respective owners.
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
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Copyright Intersil Americas Inc. 2006. All Rights Reserved
C “Slave Only” Device Address:
ISL6322
FN6328.0

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