6,4 mm x 9,7 mm

VIN

PH

BOOT

PGND

VSENSE

AGND

VBIAS

Input

TPS54972

COMP

Compensation

Network

REFIN

TRANSIENT RESPONSE

2.25 A to 6.75 A

t – Time – µs/div

TPS54972

www.ti.com

SLVS437B – AUGUST 2002 – REVISED AUGUST 2010

9-A OUTPUT, 3-V TO 4-V INPUT TRACKING/TERMINATION

SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETs (SWIFT™)

1

FEATURES

DESCRIPTION

•

Tracks Externally Applied Reference Voltage

•

15-m

Ω MOSFET Switches for High Efficiency

As a member of the SWIFT™ family of dc/dc

regulators,

the

TPS54972

low-input

voltage

at 9-A Continuous Output Source or Sink

high-output

current

synchronous-buck

PWM

Current

converter integrates all required active components.

•

Included on the substrate with the listed features are

•

Wide PWM Frequency: Fixed 350 kHz or

a true, high performance, voltage error amplifier that

Adjustable 280 kHz to 700 kHz

enables

maximum

performance

under

transient

conditions and flexibility in choosing the output filter L

•

Load Protected by Peak Current Limit and

and C components; an under-voltage-lockout circuit

Thermal Shutdown

to prevent start-up until the input voltage reaches 3.0

•

Integrated Solution Reduces Board Area and

V; an internally set slow-start circuit to limit in-rush

Total Cost

currents; and a status output to indicate valid

operating conditions.

APPLICATIONS

The TPS54972 is available in a thermally enhanced

•

DDR Memory Termination Voltage

28-pin TSSOP (PWP) PowerPAD™ package, which

•

Active Termination of GTL and SSTL

eliminates bulky heatsinks. TI provides evaluation

High-Speed Logic Families

modules and the SWIFT designer software tool to aid

•

DAC Controlled High Current Output Stage

in quickly achieving high-performance power supply

designs to meet aggressive equipment development

•

Precision Point of Load Power Supply

cycles.

SIMPLIFIED SCHEMATIC

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2010, 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.