1

®

FN9082.4

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-352-6832

Copyright Intersil Americas Inc. 2003-2005. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

ISL6571

Complementary MOSFET Driver and

Synchronous Half-Bridge Switch

The Intersil ISL6571 provides a new approach for

implementing a synchronous rectified buck switching

regulator. The ISL6571 replaces two power MOSFETs, a

Schottky diode, two gate drivers and synchronous control

circuitry. Its main applications address high-density power

conversion circuits including multiphase-topology computer

microprocessor core power regulators, ASIC and memory

array regulators, etc. Another useful feature of the ISL6571

is the compatibility with three-state input control: left open,

the PWM input turns off both output drives. The ISL6571

operates in continuous conduction mode reducing EMI

constraints and enabling high bandwidth operation.

Features

• Improved Performance over Conventional Synchronous

Buck Converter using Discrete Components

• Optimal Deadtime Provided by Adaptive Shoot-Through

• Switching Frequency up to 1MHz

- High-Bandwidth, Fast Transient Response

- Small, Low Profile Converters

• Reduced Connection Parasitics between Discrete

Components

- Low Electromagnetic Emissions

• Low Profile, Low Thermal Impedance Packaging

- High Power Density Applications

• QFN Package:

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves

PCB efficiency and has a thinner profile

• Pb-Free Available (RoHS Compliant)

Applications

• Multiphase Power Regulators

• Low-Voltage Switchmode Power Conversion

• High-Density Power Converters

Ordering Information

PART NUMBER

TEMP.

RANGE (°C)

PACKAGE

PKG.

DWG. #

ISL6571CR*

0 to 70

68 Ld 10x10 QFN L68.10x10A

ISL6571CRZ*

(See Note)

0 to 70

68 Ld 10x10 QFN

(Pb-free)

L68.10x10A

ISL6571EVAL1

Evaluation Board

*Add “-T” suffix for tape and reel.

NOTE: Intersil Pb-free products employ special Pb-free material

sets; molding compounds/die attach materials and 100% matte tin

plate termination finish, which are 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.

Data Sheet

April 18, 2005