I - Output Current - A

O

50

55

60

65

70

75

80

85

90

95

100

0

1

2

3

4

5

6

3 Vin

5 Vin

f = 500kHz

s

Vout = 1.8V

PH

VIN

POWERPAD

BOOT

VSENSE

COMP

TPS54618

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

R 4

R 5

TPS54618

www.ti.com

SLVSAE9A – NOVEMBER 2010 – REVISED OCTOBER 2012

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

Switcher With Integrated FETs ( SWIFT™)

Check for Samples: TPS54618

1

FEATURES

DESCRIPTION

The TPS54618 device is a full featured 6 V, 6 A,

2

•

Two 12-m

Ω (typical) MOSFETs for High

synchronous step down current mode converter with

Efficiency at 6-A Loads

two integrated MOSFETs.

•

300-kHz to 2-MHz Switching Frequency

The TPS54618 enables small designs by integrating

•

0.8-V ±1% Voltage Reference Over

the MOSFETs, implementing current mode control to

Temperature (-40°C to 150°C)

reduce external component count, reducing inductor

•

Synchronizes to External Clock

size by enabling up to 2 MHz switching frequency,

and minimizing the IC footprint with a small 3mm x

•

Adjustable Slow Start/Sequencing

3mm thermally enhanced QFN package.

•

UV and OV Power Good Output

The TPS54618 provides accurate regulation for a

•

–40°C to 150°C Operating Junction

variety of loads with an accurate ±1% Voltage

Temperature Range

Reference (VREF) over temperature.

•

Thermally Enhanced 3mm × 3mm 16-pin QFN

Efficiency is maximized through the integrated 12m

Ω

•

Pin Compatible to TPS54418

MOSFETs and 515

μA typical supply current. Using

the enable pin, shutdown supply current is reduced to

APPLICATIONS

5.5µA by entering a shutdown mode.

•

Low-Voltage, High-Density Power Systems

Under voltage lockout is internally set at 2.6 V, but

•

Point of Load Regulation for High Performance

can be increased by programming the threshold with

DSPs, FPGAs, ASICs and Microprocessors

a resistor network on the enable pin. The output

voltage startup ramp is controlled by the slow start

•

Broadband, Networking and Optical

pin. An open drain power good signal indicates the

Communications Infrastructure

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

SIMPLIFIED SCHEMATIC

Frequency fold back and thermal shutdown protects

the device during an over-current condition.

vertical spacer

The TPS54618 is supported in the SwitcherPro™

vertical spacer

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 © 2010–2012, 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.