+

C4

+

C3

VIN (up to 28V)

VOUT

GND

8

LG

7

VCC

6

SYNC

5

IN

4

BOOT

3

HG

2

SW

1

U1

C2

.33PF

C1

1PF

Q1

Q2

+5V

(to controller)

(to controller)

D1

L1

1.5

LM2724A

www.ti.com

SNVS242C – JUNE 2003 – REVISED MARCH 2013

LM2724A High Speed 3A Synchronous MOSFET Driver

Check for Samples: LM2724A

1

FEATURES

DESCRIPTION

The LM2724A is a dual N-channel MOSFET driver

2

•

Shoot-Through Protection

which can drive both the top and bottom MOSFETs in

•

Input Under-Voltage-Lock-Out

a push-pull structure simultaneously. The LM2724A

•

3A Peak Driving Current

takes a logic input and splits it into two complimentary

signals with a typical 20ns dead time in between. The

•

195µA Quiescent Current

built-in cross-conduction protection circuitry prevents

•

28V Input Voltage in Buck Configuration

the top and bottom MOSFETs from turning on

•

SOIC-8 and WSON Packages

simultaneously. With a bias voltage of 5V, the peak

sourcing and sinking current for each driver of the

APPLICATIONS

LM2724A is about 3A. Input UVLO (Under-Voltage-

Lock-Out) ensures that all the driver outputs stay low

•

High Current DC/DC Power Supplies

until the supply rail exceeds the power-on threshold

•

High Input Voltage Switching Regulators

during system power on, or after the supply rail drops

below power-on threshold by a specified hysteresis

•

Fast Transient Microprocessors

during system power down. The cross-conduction

•

Notebook Computers

protection circuitry detects both driver outputs and will

not turn on a driver until the other driver output is low.

The top gate voltage needed by the top MOSFET is

obtained through an external boot-strap structure.

When not switching, the LM2724A only draws up to

195µA

from

the

5V

rail.

The

synchronization

operation of the bottom MOSFET can be disabled by

pulling the SYNC pin to ground.

TYPICAL APPLICATION

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.