© Semiconductor Components Industries, LLC, 2008

October, 2008 − Rev. 0

1

Publication Order Number:

ADP3611/D

ADP3611

Dual Bootstrapped, High

Voltage MOSFET Driver

with Output Disable

The ADP3611 is a dual MOSFET driver optimized for driving two

N−channel switching MOSFETs in nonisolated synchronous buck

power converters used to power CPUs in portable computers. The

driver impedances have been chosen to provide optimum

performance in multiphase regulators at up to 25 A per phase. The

high−side driver can be bootstrapped relative to the switch node of

the buck converter and is designed to accommodate the high voltage

slew rate associated with floating high−side gate drivers. An internal

synchronous MOSFET is used to replace an external bootstrap

Schottky diode. This allows a larger high side gate voltage for

increased efficiency.

The ADP3611 includes an anticross−conduction protection circuit,

undervoltage lockout to hold the switches off until the driver has

sufficient voltage for proper operation, a crowbar input that turns on

the low−side MOSFET independently of the input signal state, and a

low−side MOSFET disable pin to provide higher efficiency at light

loads. The SD pin shuts off both the high−side and the low−side

MOSFETs to prevent rapid output capacitor discharge during system

shutdown.

The ADP3611 is specified over the extended commercial

temperature range of −10

°C to 100°C and is available in a 10−lead

MSOP package and 8−lead DFN 2x2 mm package.

Features

Applications

http://onsemi.com

MARKING DIAGRAMS

X = Specific Device Code

M = Date Code

G = Pb−Free Package

(Note: Microdot may be in either location)

XX MG

G

1

DFN8

CP SUFFIX

CASE 506AA

MSOP10

JRM SUFFIX

CASE 846AC

XXMG

G

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION

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