TPS40050Q1

TPS40051Q1

TPS40053Q1

SGLS219 − NOVEMBER 2003

WIDEINPUT SYNCHRONOUS

BUCK CONTROLLER

8

FEATURES

Be Supported Along With Major-Change

Approval

Voltage Mode Controller

Synchronous N-Channel MOSFETs

(1) Contact factory for details. Q100 qualification data available on

request.

APPLICATIONS

DESCRIPTION

The TPS4005x is a family of high-voltage, wide input

(8 V to 40 V),

synchronous, step-down converters.

The TPS4005x family offers design flexibility with a

variety of user programmable functions, including

soft-start, UVLO, operating frequency, voltage feed-

forward, high-side current limit, and loop compensation.

The TPS4005x are also synchronizable to an external

supply. They incorporate MOSFET gate drivers for

external N-channel high-side and synchronous rectifier

(SR)

MOSFETs.

Gate

drive

logic

incorporates

anti-cross conduction circuitry to prevent simultaneous

high-side and synchronous rectifier conduction.

The TPS4005x uses voltage feed-forward control

techniques to provide good line regulation over the wide

(4:1) input voltage range, and fast response to input line

transients with near constant gain with input variation

which eases loop compensation.

The externally programmable current limit provides

pulse-by-pulse current limit, as well as hiccup mode

operation utilizing an internal fault counter for longer

duration overloads.

ORDERING INFORMATION

TA

APPLICATION

PACKAGE

PART NUMBER

SOURCE(2)

Plastic HTSSOP (PWP)(1)

TPS40050QPWPRQ1

−40

°C to 125°C

SOURCE/SINK(2)

Plastic HTSSOP (PWP)(1)

TPS40051QPWPRQ1

−40 C to 125 C

SOURCE/SINK(2) with prebias

Plastic HTSSOP (PWP)(1)

TPS40053QPWPRQ1

(1) This PWP package is taped and reeled as indicated by the R suffix on the device type (i.e., TPS40050QPWPRQ1). See the application section of

the data sheet for PowerPAD drawing and layout information.

(2) See Application Information section, pg. 8

PowerPAD

t is trademark of Texas Instruments.

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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Copyright

 2002, 2003, 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.