a
Dual MOSFET Driver
with Bootstrapping
ADP3412
FUNCTIONAL BLOCK DIAGRAM
FEATURES
All-In-One Synchronous Buck Driver
Bootstrapped High Side Drive
One PWM Signal Generates Both Drives
Programmable Transition Delay
Anticross-Conduction Protection Circuitry
BST
VCC
ADP3412
APPLICATIONS
Multiphase Desktop CPU Supplies
Mobile Computing CPU Core Power Converters
Single-Supply Synchronous Buck Converters
Standard-to-Synchronous Converter Adaptations
IN
DLY
DRVH
OVERLAP
PROTECTION
CIRCUIT
SW
DRVL
PGND
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 propagation 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 prevent shoot-through current in the external MOSFETs.
5V
12V
D1
VCC
BST
ADP3412
CBST
DRVH
IN
Q1
SW
DLY
CDLY
DELAY
1V
DRVL
Q2
1V
PGND
Figure 1. General Application Circuit
REV. A
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