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ADP3418 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADP3418
Description  Dual Bootstrapped 12 V MOSFET Driver with Output Disable
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
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ADP3418 Datasheet(HTML) 1 Page - Analog Devices

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Dual Bootstrapped 12 V MOSFET
Driver with Output Disable
ADP3418
Rev. B
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.
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
© 2004 Analog Devices, Inc. All rights reserved.
FEATURES
All-in-one synchronous buck driver
Bootstrapped high-side drive
1 PWM signal generates both drives
Anticross-conduction protection circuitry
Output disable control turns off both MOSFETs to float the
output per Intel® VRM 10 and AMD Opteron specifications
APPLICATIONS
Multiphase desktop CPU supplies
Single-supply synchronous buck converters
GENERAL DESCRIPTION
The ADP3418 is a dual, high voltage MOSFET driver optimized
for driving two N-channel MOSFETs, the two switches in a
nonisolated, synchronous, buck power converter. Each of the
drivers is capable of driving a 3000 pF load with 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 ADP3418 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 shutdowns.
The ADP3418 is specified over the commercial temperature
range of 0°C to 85°C, and is available in an 8-lead SOIC
package.
FUNCTIONAL BLOCK DIAGRAM
R
SQ
Q
CMP
1V
VCC
6
DELAY
DELAY
5
7
CMP
2
3
OD
4
ADP3418
CVCC
BST
VCC
DRVH
SW
DRVL
PGND
IN
6
1
CBST1
RBST1
8
RG
CBST2
D1
TO
INDUCTOR
Q1
Q2
12V
Figure 1.


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