V

(50mV/div)

OUT

I

(1 A/div)

OUT

100 s/div

m

TPS54225

www.ti.com

SLVSA15C

– OCTOBER 2009 – REVISED FEBRUARY 2011

Check for Samples: TPS54225

1

FEATURES

DESCRIPTION

23

•

D-CAP2

™ Mode Enables Fast Transient

Response

The TPS54225 is an adaptive on-time D-CAP2

™

mode synchronous buck converter. The TPS54225

•

Low Output Ripple and Allows Ceramic Output

enables system designers to complete the suite of

Capacitor

various end equipment

’s power bus regulators with a

•

cost effective, low component count, low standby

•

current solution. The main control loop for the

TPS54225 uses the D-CAP2

™ mode control which

•

Output Voltage Range: 0.76 V to 5.5 V

provides a fast transient response with no external

•

Highly Efficient Integrated FET

’s Optimized

compensation components.

for Lower Duty Cycle Applications

The TPS54225 also has a proprietary circuit that

- 160 m

Ω (High Side) and 110 mΩ (Low Side)

enables the device to adapt to both low equivalent

•

High Efficiency, less than 10

μA at shutdown

series resistance (ESR) output capacitors, such as

•

High Initial Bandgap Reference Accuracy

POSCAP or SP-CAP, and ultra-low ESR ceramic

•

Adjustable Soft Start

capacitors. The device operates from 4.5-V to 18-V

•

Pre-Biased Soft Start

supply

voltage.

The

output

voltage

can

be

•

programmed between 0.76 V and 5.5 V. The device

•

Cycle-By-Cycle Overcurrent Limit

also features an adjustable slow start time and a

power good function. The TPS54225 is available in

•

Power Good Output

the 14 pin HTSSOP package, and designed to

operate from

–40°C to 85°C.

APPLICATIONS

•

Wide Range of Applications for Low Voltage

System

– Digital TV Power Supply

– High Definition Blu-ray Disc™ Players

– Networking Home Terminal

– Digital Set Top Box (STB)

space

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

D-CAP2, PowerPAD are trademarks of Texas Instruments.

3

Blu-ray Disc is a trademark of Blu-ray Disc Association.

PRODUCTION DATA information is current as of publication date.

© 2009–2011, 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.