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Analog Devices Semiconductor Electronic Components Datasheet

ADP3110A Datasheet

MOSFET Driver

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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
OD for disabling the driver outputs
Meets CPU VR requirement when used with
Analog Devices Flex-Mode™1 controller
APPLICATIONS
Multiphase desktop CPU supplies
Single-supply synchronous buck converters
Dual Bootstrapped, 12 V MOSFET
Driver with Output Disable
ADP3110A
GENERAL DESCRIPTION
The ADP3110A 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 driver is capable of driving a 3000 pF load with a 25 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 ADP3110A 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 ADP3110A is specified over the commercial temperature
range of 0°C to 85°C and is available in an 8-lead SOIC_N or an
8-lead LFCSP_VD package.
1 Flex-Mode™ is protected by U.S. Patent 6683441; other patents pending.
FUNCTIONAL BLOCK DIAGRAM
12V
ADP3110A
IN 2
VCC
4
DELAY
LATCH
R1
R2 Q
S
OD 3
CMP
1V
DELAY
CMP
VCC
6
CONTROL
LOGIC
Figure 1.
D1
BST
1
CBST1
DRVH
8
CBST2
RG
Q1
SW
7
RBST
TO
INDUCTOR
DRVL
5
PGND
6
Q2
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2006 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

ADP3110A Datasheet

MOSFET Driver

No Preview Available !

ADP3110A pdf
ADP3110A
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Timing Characteristics..................................................................... 6
Typical Performance Characteristics ............................................. 7
REVISION HISTORY
3/06—Revision 0: Initial Version
Theory of Operation .........................................................................9
Low-Side Driver ............................................................................9
High-Side Driver ...........................................................................9
Overlap Protection Circuit...........................................................9
Application Information................................................................ 10
Supply Capacitor Selection ....................................................... 10
Bootstrap Circuit........................................................................ 10
MOSFET Selection..................................................................... 10
PC Board Layout Considerations............................................. 11
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 13
Rev. 0 | Page 2 of 16


Part Number ADP3110A
Description MOSFET Driver
Maker Analog Devices
Total Page 16 Pages
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