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ADP3118 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADP3118
Description  Dual Bootstrapped 12 V MOSFET Driver with Output Disable
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP3118 Datasheet(HTML) 1 Page - Analog Devices

 
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Dual Bootstrapped 12 V MOSFET
Driver with Output Disable
ADP3118
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2005 Analog Devices, Inc. All rights reserved.
FEATURES
Optimized for low gate charge MOSFETs
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
to float output per Intel® VRM 10 specification
APPLICATIONS
Multiphase desktop CPU supplies
Single-supply synchronous buck converters
GENERAL DESCRIPTION
The ADP3118 is a dual high voltage 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 25 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
ADP3118 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 ADP3118 is specified over the commercial temperature
range of 0°C to 85°C and is available in 8-lead SOIC package.
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
2
3
OD
IN
ADP3118
VCC
BST
DRVH
SW
DRVL
PGND
DELAY
VCC
6
DELAY
CMP
CMP
1V
4
1
7
CONTROL
LOGIC
6
5
8
RBST
RG
CBST1
D1
CBST2
VIN 12V
Q1
TO
INDUCTOR
Q2
Figure 1.
Flex-Mode™ is Protected by U.S. Patent 6683441


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