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ADP3412JR

Dual MOSFET Driver with Bootstrapping

Analog Devices 

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FEATURES

All-In-One Synchronous Buck Driver

Bootstrapped High Side Drive

One PWM Signal Generates Both Drives

Programmable Transition Delay

Anticross-Conduction Protection Circuitry

APPLICATIONS

Multiphase Desktop CPU Supplies

Mobile Computing CPU Core Power Converters

Single-Supply Synchronous Buck Converters

Standard-to-Synchronous Converter Adaptations

Dual MOSFET Driver

with Bootstrapping

ADP3412

FUNCTIONAL BLOCK DIAGRAM

VCC

BST

ADP3412

IN

DLY

OVERLAP

PROTECTION

CIRCUIT

DRVH

SW

DRVL

GENERAL DESCRIPTION

The ADP3412 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

ADP3412 includes overlapping drive protection (ODP) to pre-

vent shoot-through current in the external MOSFETs.

ADP3412

IN

DLY

CDLY

DELAY

1V

PGND

5V

VCC

12V

D1

BST

DRVH

CBST

Q1

SW

1V

DRVL

Q2

PGND

Figure 1. General Application Circuit

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

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

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