TPS40000, TPS40001

TPS40002, TPS40003

TPS40004, TPS40005

SLUS507C − JANUARY 2002 − REVISED JUNE 2004

LOW INPUT VOLTAGEMODE

SYNCHRONOUS BUCK CONTROLLER

1

www.ti.com

FEATURES

Drivers for Higher Efficiency

Overcurrent Limit

Higher Performance

− TPS40000/1/4

300-kHz

− TPS40002/3/5

600-kHz

SIMPLIFIED APPLICATION DIAGRAM

APPLICATIONS

DESCRIPTION

The TPS4000x are controllers for low-voltage,

non-isolated synchronous buck regulators. These

controllers drive an N-channel MOSFET for the

primary buck switch, and an N-channel MOSFET

for the synchronous rectifier switch, thereby

achieving very high-efficiency power conversion. In

addition, the device controls the delays from main

switch off to rectifier turn-on and from rectifier

turn-off to main switch turn-on in such a way as to

minimize diode losses (both conduction and

recovery) in the synchronous rectifier with TI’s

proprietary Predictive Gate Drive

t technology. The

reduction in these losses is significant and increases

efficiency. For a given converter power level, smaller

FETs can be used, or heat sinking can be reduced

or even eliminated.

UDG−01141

VIN

VOUT

1

ILIM

10

BOOT

2FB

9

HDRV

3

COMP

8

SW

4

SS/SD

7

VDD

5

GND

6

LDRV

TPS40000

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.

Copyright

 2002, Texas Instruments Incorporated

PowerPAD

t and Predictive Gate Drivet are trademarks of Texas Instruments Incorporated.