PH

VIN

POWERPAD

BOOT

VSENSE

COMP

TPS54318

EN

RT /CLK

SS

PWRGD

C ss

R T

R 3

C 1

C

BOOT

C O

LO

R 1

R 2

C I

VOUT

VIN

AGND

GND

R4

R5

50

55

60

65

70

75

80

85

90

95

100

0

0.5

1

1.5

2

2.5

3

I -OutputCurrent- A

O

V =5V,

V

=1.8V,

F =1000kHz

I

O

S

TPS54318

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

Switcher With Integrated FETs ( SWIFT™)

Check for Samples :TPS54318

1

FEATURES

DESCRIPTION

2

•

Two 30 m

Ω (typical) MOSFETs for High

The TPS54318 device is a full featured 6 V, 3 A,

Efficiency at 3 A loads

synchronous step down current mode converter with

two integrated MOSFETs.

•

200kHz to 2MHz Switching Frequency

•

0.8 V ± 1% Voltage Reference Over

The TPS54318 enables small designs by integrating

the MOSFETs, implementing current mode control to

temperature

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.

•

Low Operating and Shutdown Quiescent

The TPS54318 provides accurate regulation for a

Current

variety of loads with an accurate ±1% Voltage

•

Safe Start-up into Pre-Biased Output

•

Cycle by Cycle Current Limit, Thermal and

Efficiency is maximized through the integrated 30m

Ω

Frequency Fold Back Protection

MOSFETs and 350

μA typical supply current. Using

the enable pin, shutdown supply current is reduced to

•

–40°C to 150°C Operating Junction

2

μA by entering a shutdown mode.

Temperature Range

Undervoltage lockout is internally set at 2.6 V, but

•

Thermally Enhanced 3mm × 3mm 16-pin QFN

can be increased by programming the threshold with

a resistor network on the enable pin. The output

APPLICATIONS

voltage startup ramp is controlled by the slow start

•

Low-Voltage, High-Density Power Systems

pin. An open drain power good signal indicates the

•

Point of Load Regulation for High Performance

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

DSPs, FPGAs, ASICs and Microprocessors

Frequency fold back and thermal shutdown protects

•

Broadband, Networking and Optical

the device during an overcurrent condition.

Communications Infrastructure

SIMPLIFIED SCHEMATIC

Software Tool at www.ti.com/switcherpro.

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 is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, 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.