TPS2830, TPS2831

FAST SYNCHRONOUS-BUCK MOSFET DRIVERS

WITH DEADTIME CONTROL

SLVS196B – JANUARY1999 – REVISED SEPTEMBER 1999

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POST OFFICE BOX 655303

High-Side Driver

Propagation Delay — 3-nF Load

Applications

Nonsynchronous Operation

Faulted High-Side Power FETs

Operating Range

description

The TPS2830 and TPS2831 are MOSFET drivers for synchronous-buck power stages. These devices are ideal

for designing a high-performance power supply using a switching controller that does not include suitable

MOSFET drivers on the chip. The drivers are designed to deliver 2.4-A peak currents into large capacitive loads.

Higher currents can be controlled by using multiple drivers in a multiphase configuration. The high-side driver

can be configured as a ground-reference driver or as a floating bootstrap driver. 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 TPS2830/31 drivers have additional control functions:

ENABLE, SYNC, and CROWBAR. Both drivers are off when ENABLE is low. The driver is configured as a

nonsynchronous-buck driver when SYNC is low. The CROWBAR function turns on the low-side power FET,

overriding the IN signal, for over-voltage protection against faulted high-side power FETs.

The TPS2830 has a noninverting input. The TPS2831 has an inverting input. The TPS2830/31 drivers are

available in 14-terminal SOIC and TSSOP packages and operate over a junction temperature range of –40

°C

to 125

°C.

AVAILABLE OPTIONS

PACKAGED DEVICES

TJ

SOIC

(D)

TSSOP

(PWP)

–40

°C to 125°C

TPS2830D

TPS2831D

TPS2830PWP

TPS2831PWP

The D and PWP packages are available taped and reeled. Add R

suffix to device type (e.g., TPS2830DR)

Copyright

© 1999, 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.

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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ENABLE

IN

CROWBAR

NC

SYNC

DT

PGND

BOOT

NC

HIGHDR

BOOTLO

LOWDR

NC

D OR PWP PACKAGE

(TOP VIEW)

NC – No internal connection