REV. 0

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a

ADP3413

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., 2001

Dual Bootstrapped MOSFET Driver

with Output Disable

FUNCTIONAL BLOCK DIAGRAM

IN

VCC

OVERLAP

PROTECTION

CIRCUIT

BST

DRVH

SW

DRVL

PGND

ADP3413

FEATURES

All-In-One Synchronous Buck Driver

Bootstrapped High-Side Drive

One PWM Signal Generates Both Drives

Anticross-Conduction Protection Circuitry

Pulse-by-Pulse Disable Control

APPLICATIONS

Multiphase Desktop CPU Supplies

Mobile Computing CPU Core Power Converters

Single-Supply Synchronous Buck Converters

Standard-to-Synchronous Converter Adaptations

GENERAL DESCRIPTION

The ADP3413 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 ADP3413 includes overlapping drive protection (ODP)

to prevent shoot-through current in the external MOSFETs.

The

OD pin provides high speed control to quickly turn off

both gate drives.

The ADP3413 is specified over the commercial temperature

range of 0

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

IN

VCC

ADP3413

BST

DRVH

SW

DRVL

PGND

DELAY

1V

+1V

12V

7V

Q1

Q2

D1

Figure 1. General Application Circuit