V

-50mA/div

OUT

I

-1 A/div

OUT

100

s/div

m

TPS54226

www.ti.com

SLVSA14A – OCTOBER 2009 – REVISED OCTOBER 2009

Efficiency

Check for Samples: TPS54226

1

FEATURES

DESCRIPTION

23

•

D-CAP2™ Mode Enables Fast Transient

Response

The TPS54226 is a adaptive on-time D-CAP2™

mode synchronous buck converter. TheTPS54226

•

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

TPS54226 uses the D-CAP2™ mode control which

•

Output Voltage Range: 0.76 V to 5.5 V

provides a very fast transient response with no

•

Highly Efficient Integrated FET’s Optimized

external compensation components. The adoptive

for Lower Duty Cycle Applications

on-time control supports seamless operation between

– 160 m

Ω (High Side) and 110 mΩ (Low Side)

PWM mode at heavy load condition and reduced

•

High Efficiency, less than 10

μA at shutdown

frequency operation at light load for high efficiency.

The TPS54226 also has a proprietary circuit that

•

High Initial Bandgap Reference Accuracy

enables the device to adopt to both low equivalent

•

Adjustable Soft Start

series resistance (ESR) output capacitors, such as

•

Pre-Biased Soft Start

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

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

•

VCC input, and from 2-V to 18-V VIN input power

•

Cycle By Cycle Over Current Limit

supply

voltage.

The

output

voltage

can

be

•

Power Good Output

programmed between 0.76 V and 5.5 V. The device

also features an adjustable slow start time and a

•

Auto-Skip Mode

power good function. The TPS54226 is available in

the 14 pin HTSSOP package, and designed to

APPLICATIONS

operate from –40°C to 85°C.

•

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)

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.

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.