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ADP3418KRZ1: DescriptionDual Bootstrapped 12 V MOSFET Driver with Output Disable; File Size313KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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Dual Bootstrapped 12 V MOSFET Driver with Output Disable

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Dual Bootstrapped 12 V MOSFET

Driver with Output Disable

ADP3418

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

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.

APPLICATIONS

Multiphase desktop CPU supplies

Single-supply synchronous buck converters

FUNCTIONAL BLOCK DIAGRAM

12V

VCC

BST2

BST1

ADP3418

BST

DRVH

DELAY

INDUCTOR

CMP

DELAY

VCC

DRVL

PGND

CMP

Figure 1.

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

03229-B-001

ADP3418

TABLE OF CONTENTS

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Timing Characteristics..................................................................... 6

Typical Performance Characteristics ............................................. 7

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................................................. 12

Outline Dimensions ....................................................................... 14

Ordering Guide .......................................................................... 14

REVISION HISTORY

8/04—Data Sheet Changed from Rev. A to Rev. B

Updated Figure 1; Deleted Figure 2.....................................................1

Updated Specifications Table ...............................................................3

Updated Pin Description......................................................................5

Updated Theory of Operation .............................................................9

Updated Applications Section............................................................10

Change to Ordering Guide.................................................................14

4/04—Data Sheet Changed from Rev. 0 to Rev. A

Updated Format...................................................................... Universal

Change to General Description ...........................................................1

Change to Figure 13 ..............................................................................8

Change to Ordering Guide.................................................................12

3/03—Revision 0: Initial Version

Rev. B | Page 2 of 16

ADP3418KRZ1 Related Products

	ADP3418KRZ1	ADP3188	ADP3418KRZ-REEL1
Description	Dual Bootstrapped 12 V MOSFET Driver with Output Disable	Dual Bootstrapped 12 V MOSFET Driver with Output Disable	Dual Bootstrapped 12 V MOSFET Driver with Output Disable

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