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
C
BST
Q1
Q2
D1
TO
INDUCTOR
1V
Figure 1. General Application Circuit