REV. A

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a

ADP3417

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

Dual Bootstrapped

MOSFET Driver

FUNCTIONAL BLOCK DIAGRAM

IN

VCC

OVERLAP

PROTECTION

CIRCUIT

BST

DRVH

SW

DRVL

PGND

ADP3417

FEATURES

All-In-One Synchronous Buck Driver

Bootstrapped High Side Drive

One PWM Signal Generates Both Drives

Anticross-Conduction Protection Circuitry

APPLICATIONS

Multiphase Desktop CPU Supplies

Single-Supply Synchronous Buck Converters

Standard-to-Synchronous Converter Adaptations

GENERAL DESCRIPTION

The ADP3417 is a dual MOSFET driver optimized for driving

two N-channel MOSFETs which are the two switches in a

nonisolated synchronous buck power converter. Each of the

drivers is capable of driving a 3000 pF load with a 20 ns propa-

gation delay and a 30 ns transition time. One of the drivers can

be bootstrapped and is designed to handle the high voltage

slew rate associated with “floating” high side gate drivers.

The ADP3417 includes overlapping drive protection (ODP)

to prevent shoot-through current in the external MOSFETs.

The ADP3417 is specified over the commercial temperature

range of 0

°C to 70°C and is available in an 8-lead SOIC package.

IN

VCC

ADP3417

BST

DRVH

SW

DRVL

PGND

DELAY

1V

12V

Q1

Q2

D1

TO

INDUCTOR

1V

Figure 1. General Application Circuit