ADP3120 Analog Devices, ADP3120 Datasheet

ADP3120

Manufacturer Part Number

ADP3120

Description

Dual Bootstrapped 12 V MOSFET Driver

Manufacturer

Analog Devices

Datasheet

1.ADP3120.pdf (16 pages)

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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

ADP3120

CMP

SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM

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

Driver with Output Disable

BST

DRVH

PGND

DRVL

BST1

BST

BST2

12V

ADP3120

www.analog.com

INDUCTOR

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