ADP3120 Analog Devices, ADP3120 Datasheet

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ADP3120

Manufacturer Part Number
ADP3120
Description
Dual Bootstrapped 12 V MOSFET Driver
Manufacturer
Analog Devices
Datasheet

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FEATURES
All-in-one synchronous buck driver
Bootstrapped high-side drive
One PWM signal generates both drives
Anticross-conduction protection circuitry
Output disable control turns off both MOSFETs
APPLICATIONS
Multiphase desktop CPU supplies
Single-supply synchronous buck converters
Rev. 0
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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
to float output per Intel® VRM 10 specification
OD
IN
3
2
ADP3120
1V
CMP
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
DELAY
DELAY
CONTROL
LOGIC
Figure 1.
CMP
Dual Bootstrapped 12 V MOSFET
GENERAL DESCRIPTION
The ADP3120 is a dual, high voltage MOSFET driver optimized
for driving two N-channel MOSFETs, the two switches in a non-
isolated synchronous buck power converter. Each of the drivers
is capable of driving a 3000 pF load with a 45 ns propagation
delay and a 25 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
ADP3120 includes overlapping drive protection to prevent
shoot-through current in the external MOSFETs.
The OD pin shuts off both the high-side and the low-side
MOSFETs to prevent rapid output capacitor discharge during
system shutdown.
The ADP3120 is specified over the commercial temperature
range of 0°C to 85°C and is available in 8-lead SOIC and 8-lead
LFCSP packages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
VCC
6
VCC
4
Driver with Output Disable
© 2005 Analog Devices, Inc. All rights reserved.
1
8
7
6
5
BST
DRVH
SW
PGND
DRVL
C
BST1
D1
R
BST
R
G
C
BST2
12V
ADP3120
www.analog.com
Q1
Q2
INDUCTOR
TO

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