VOUT

PVIN

VIN

TPS84320

SENSE+

VADJ

AGND

PGND

UDG-10082

PWRGD

STSEL

RT/CLK

INH/UVLO

SS/TR

40

45

50

55

60

65

70

75

80

85

90

95

100

0

0.5

1

1.5

2

2.5

3

Output Current (A)

G000

TPS84320

www.ti.com

SLUSAH7

– SEPTEMBER 2011

4.5-V to 14.5-V Input, 3-A Synchronous Buck, Integrated Power Solution

Check for Samples: TPS84320

1

FEATURES

DESCRIPTION

2

•

Complete Integrated Power Solution Allows

The TPS84320RUQ is an easy-to-use integrated

Small Footprint, Low-Profile Design

power solution that combines a 3-A DC/DC converter

•

Efficiencies Up To 95%

with power MOSFETs, an inductor, and passives into

•

Wide-Output Voltage Adjust

a low profile, BQFN package. This total power

0.8 V to 5.5 V, with 1% Reference Accuracy

solution allows as few as 3 external components and

eliminates the loop compensation and magnetics

•

Optional Split Power Rail Allows

design process.

Input Voltage Down to 1.6 V

The 9

×15×2.8 mm BQFN package is easy to solder

•

Adjustable Switching Frequency

onto a printed circuit board and allows a compact

(330 kHz to 780 kHz)

point-of-load design with up to 95% efficiency and

•

Synchronizes to an External Clock

excellent power dissipation with a thermal impedance

•

Adjustable Slow-Start

of 13

°C/W junction to ambient. The device delivers

the full 3-A rated output current at 85

°C ambient

•

Output Voltage Sequencing / Tracking

temperature without airflow.

•

Power Good Output

The

TPS84320

offers

the

flexibility

and

the

•

Programmable Undervoltage Lockout (UVLO)

feature-set of a discrete point-of-load design and is

•

Overcurrent Protection - Hiccup-Mode

ideal for powering performance DSPs and FPGAs.

•

Over Temperature Protection

Advanced packaging technology afford a robust and

reliable power solution compatible with standard QFN

•

Pre-bias Output Start-up

mounting and testing techniques.

•

Operating Temperature Range:

–40°C to 85°C

•

Enhanced Thermal Performance: 13

°C/W

SIMPLIFIED APPLICATION

•

Meets EN55022 Class B Emissions

•

For Design Help Including SwitcherPro

™ visit

http://www.ti.com/TPS84320

APPLICATIONS

•

Broadband

& Communications Infrastructure

•

Automated Test and Medical Equipment

•

Compact PCI / PCI Express / PXI Express

•

DSP and FPGA Point of Load Applications

•

High Density Distributed Power Systems

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.

2

SwitcherPro is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, 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.