50

55

60

65

70

75

80

85

90

95

100

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

I -OutputCurrent- A

O

V =5V,

V

=1.8V,

F =1000kHz

I

O

S

PH

VIN

POWERPAD

BOOT

VSENSE

COMP

TPS54218

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

TPS54218

www.ti.com

SLVS974A – SEPTEMBER 2009 – REVISED AUGUST 2012

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

Switcher With Integrated FETs ( SWIFT™)

Check for Samples: TPS54218

1

FEATURES

DESCRIPTION

The TPS54218 device is a full featured 6 V, 2 A,

2

•

Two 30 m

Ω (typical) MOSFETs for High

synchronous step down current mode converter with

Efficiency at 2 A loads

two integrated MOSFETs.

•

200kHz to 2MHz Switching Frequency

The TPS54218 enables small designs by integrating

•

0.8 V ± 1% Voltage Reference Over

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,

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 TPS54218 provides accurate regulation for a

•

Low Operating and Shutdown Quiescent

variety of loads with an accurate ±1% Voltage

Current

•

Safe Start-up into Pre-Biased Output

Efficiency is maximized through the integrated 30m

Ω

•

Cycle by Cycle Current Limit, Thermal and

MOSFETs and 350

μA typical supply current. Using

Frequency Fold Back Protection

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

pin. An open drain power good signal indicates the

•

Low-Voltage, High-Density Power Systems

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

•

Point of Load Regulation for High Performance

Frequency fold back and thermal shutdown protects

DSPs, FPGAs, ASICs and Microprocessors

the device during an overcurrent condition.

•

Broadband, Networking and Optical

Communications Infrastructure

Software Tool at www.ti.com/switcherpro.

SIMPLIFIED SCHEMATIC

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 is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2012, 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.