Intel Intersil ISL6324A Data Sheet

ISL6324A

Hybrid SVI/PVI with I2C

Data Sheet March 23, 2009 FN6880.0

Monolithic Dual PWM Hybrid Controller Features Powering AMD SVI Split-Plane and PVI

Processor Core Voltage Regulator Features

Uniplane Processors

Configuration Flexibility

The ISL6324A 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 ISL6324A supports hybrid power control of

AMD processors which operate from either a 6-bit parallel Parallel VID (6-bit) Interface Inputs for PVI Mode

VID interface (PVI) or a serial VID interface (SVI). The dual PSI_L Support via Phase Shedding output ISL6324A features a multi-phase controller to support

Differential Remote Voltage Sensing

uniplane VDD core voltage and a single phase controller to

Optimal Processor Core Voltage Transient Response

power the Northbridge (VDDNB) in SVI mode. Only the

Adaptive Phase Alignment (APA)

multi-phase controller is active in PVI mode to support uniplane VDD only processors. Active Pulse Positioning Modulation

Processor Core Voltage Regulator and North Bridge

A precision uniplane core voltage regulation system is provided

Voltage Regulator Shared Features

by a 2-to-4-phase PWM voltage regulator (VR) controller. The integration of two power MOSFET drivers, adding flexibility in Precision Voltage Regulation: ±0.5% System Accuracy

layout, reduce the number of external components in the multi- Over-Temperature

phase section. A single phase PWM controller with integrated Two Wire, AMD Compliant Serial VID Interface Inputs for

driver provides a second precision voltage regulation system SVI Mode

for the North Bridge portion of the processor. This monolithic, I2C Interface dual controller with integrated driver solution provides a cost

Voltage Margining, OVP and PGOOD Trip Levels

and space saving power management solution.

Enhanced PSI_L State Control

For applications which benefit from load line programming to

Fully Differential, Continuous DCR Current Sensing

reduce bulk output capacitors, the ISL6324A features output

Accurate Load Line Programming

voltage droop. The multi-phase portion also includes

Precision Channel Current Balancing for Core

advanced control loop features for optimal transient response to load application and removal. One of these features is Overcurrent Protection highly accurate, fully differential, continuous DCR current

Multi-tiered Overvoltage Protection

sensing for load line programming and channel current

Variable Gate Drive Bias: 5V to 12V

balance. Dual edge modulation is another unique feature,

Simultaneous Digital Soft-Start of Both Outputs

allowing for quicker initial response to high di/dt load transients. Selectable Switching Frequency up to 1MHz

Pb-Free (Ro HS Compliant)

The ISL6324A supports Power Savings Mode by dropping phases when the PSI_L bit is set. The number of phases

Ordering Information

that the ISL6324A will drop to is programmable through an

PART TEMP.

I2C interface. The number of PWM cycles between both

NUMBER PART RANGE PACKAGE PKG.

dropping phases when entering Power Savings Mode and

(Note) MARKING (°C) (Pb-free) DWG. #

adding phases when exiting Power Savings Mode is also

ISL6324ACRZ* ISL6324A CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7

programmable through the I2C interface.

ISL6324AIRZ* ISL6324A IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7

The ISL6324A I2C interface also allows independent

*Add “-T” suffix for tape and reel. Please refer to TB347 for details on

programmable output voltage offset for both the Core and

reel specifications.

North Bridge regulators. The I2C interface can also be used NOTE: These Intersil Pb-free plastic packaged products employ

to set the PGOOD and OVP trip levels for both regulators as special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is

well.

Ro HS compliant and compatible with both Sn Pb 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.

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.