TPS2834, TPS2835

SYNCHRONOUSBUCK MOSFET DRIVERS

WITH DEADTIME CONTROL

SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002

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POST OFFICE BOX 655303

High-Side Driver

Nonsynchronous Operation

Faulted High-Side Power FETs

Power Supplies

Temperature Range

Packages

description

The TPS2834 and TPS2835 are MOSFET drivers for synchronous-buck power stages. These devices are ideal

for designing a high-performance power supply using switching controllers that do not include on-chip MOSFET

drivers. The drivers are designed to deliver minimum 2-A peak currents into large capacitive loads. The

high-side driver can be configured as ground-reference or as floating-bootstrap. An adaptive dead-time control

circuit eliminates shoot-through currents through the main power FETs during switching transitions, and

provides high efficiency for the buck regulator. The TPS2834 and TPS2835 have additional control functions:

ENABLE, SYNC, and CROWBAR. Both high-side and low-side drivers are off when ENABLE is low. The driver

is configured as a nonsynchronous-buck driver disabling the low-side driver when SYNC is low. The CROWBAR

function turns on the low-side power FET, overriding the IN signal, for overvoltage protection against faulted

high-side power FETs.

The TPS2834 has a noninverting input, while the TPS2835 has an inverting input. These drivers are available

in 14-terminal SOIC and thermally enhanced TSSOP PowerPAD

 packages and operate over a junction

temperature range of − 40

°C to 125°C.

Related Synchronous MOSFET Drivers

DEVICE NAME

ADDITIONAL FEATURES

INPUTS

TPS2830

ENABLE, SYNC, and CROWBAR

CMOS

Noninverted

TPS2831

ENABLE, SYNC, and CROWBAR

CMOS

Inverted

TPS2832

W/O ENABLE, SYNC, and CROWBAR

CMOS

Noninverted

TPS2833

W/O ENABLE, SYNC, and CROWBAR

CMOS

Inverted

TPS2836

W/O ENABLE, SYNC, and CROWBAR

TTL

Noninverted

TPS2837

W/O ENABLE, SYNC, and CROWBAR

TTL

Inverted

Copyright

 2002, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

PowerPAD is a trademark of Texas Instruments Incorporated.

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.

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PWP PACKAGE

(TOP VIEW)

NC − No internal connection

ENABLE

IN

CROWBAR

NC

SYNC

DT

PGND

BOOT

NC

HIGHDR

BOOTLO

LOWDR

NC

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ENABLE

IN

CROWBAR

NC

SYNC

DT

PGND

BOOT

NC

HIGHDR

BOOTLO

LOWDR

NC

D PACKAGE

(TOP VIEW)

Thermal

Pad