PH

VIN

POWERPAD

BOOT

VSENSE

COMP

TPS54319

EN

RT /CLK

SS/TR

PWRGD

C ss

R T

R 3

C 1

C

BOOT

C O

LO

R 1

R 2

C I

VOUT

VIN

AGND

GND

40

50

60

70

80

90

0

10

20

30

100

0

0.5

2

2.5

3

Output Current - A

1

1.5

5 Vin, 1.8 Vout

3.3 Vin,1.8 Vout

TPS54319

www.ti.com

SLVSA83 – JUNE 2010

2.95-V to 6-V Input, 3-A Output, 2-MHz, Synchronous Step-Down

Switcher With Integrated FETs ( SWIFT™)

Check for Samples: TPS54319

1

FEATURES

DESCRIPTION

2

•

Two 45-m

Ω (typical) MOSFETs for High

The TPS54319 device is a full featured 6 V, 3 A,

Efficiency at 3-A Loads

synchronous step down current mode converter with

two integrated MOSFETs.

•

300kHz to 2MHz Switching Frequency

•

0.8 V ± 3.0% Voltage Reference Over

The TPS54319 enables small designs by integrating

the MOSFETs, implementing current mode control to

Temperature (0°C to 85°C)

reduce external component count, reducing inductor

•

Synchronizes to External Clock

size by enabling up to 2 MHz switching frequency,

•

Adjustable Slow Start/Sequencing

and minimizing the IC footprint with a small 3mm x

•

UV and OV Power Good Output

3mm thermally enhanced QFN package.

•

–40°C to 150°C Operating Junction

The TPS54319 provides accurate regulation for a

Temperature Range

variety of loads with an accurate ±3.0% Voltage

Reference (VREF) over temperature.

•

Thermally Enhanced 3mm × 3mm 16-pin QFN

•

Pin Compatible to TPS54318

Efficiency is maximized through the integrated 45m

Ω

MOSFETs and 360mA typical supply current. Using

the enable pin, shutdown supply current is reduced to

APPLICATIONS

2 µA by entering a shutdown mode.

•

Low-Voltage, High-Density Power Systems

•

Point-of-Load Regulation for Consumer

Under voltage lockout is internally set at 2.6 V, but

Applications such as Set Top Boxes, LCD

can be increased by programming the threshold with

Displays, CPE Equipment

a resistor network on the enable pin. The output

voltage startup ramp is controlled by the slow start

pin. An open drain power good signal indicates the

SIMPLIFIED SCHEMATIC

output is within 93% to 107% of its nominal voltage.

vertical spacer

Frequency fold back and thermal shutdown protects

vertical spacer

the device during an over-current condition.

The TPS54319 is supported in the SwitcherPro™

Software Tool at www.ti.com/switcherpro.

website at www.ti.com/swift.

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

SWIFT, SwitcherPro are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 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.