SS

EN

VREG5

VFB

1

2

3

4

VBST

VIN

SW

GND

8

7

6

5

VOUT

PwPd

TPS54239DDA

9

VOUT

VIN

EN

Vout (50 mV/div)

Iout (1 A/div)

100 us/div

TPS54239

www.ti.com

SLVSBT0 – JANUARY 2013

4.5V to 23V Input, 2-A Synchronous Step-Down SWIFT™ Converter

Check for Samples: TPS54239

1

FEATURES

DESCRIPTION

The TPS54239 is an adaptive on-time D-CAP2™

23

•

D-CAP2™ Mode Enables Fast Transient

mode synchronous buck converter. The TPS54239

Response

enables system designers to complete the suite of

•

Low Output Ripple and Allows Ceramic Output

various end-equipment power bus regulators with a

Capacitor

cost effective, low component count, low standby

current solution. The main control loop for the

•

TPS54239 uses the D-CAP2™ mode control that

•

Output Voltage Range: 0.76 V to 7.0 V

provides a fast transient response with no external

•

Highly Efficient Integrated FETs Optimized

compensation components. The TPS54239 also has

for Lower Duty Cycle Applications

a proprietary circuit that enables the device to adopt

– 140 m

Ω (High Side) and 70 mΩ (Low Side)

to both low equivalent series resistance (ESR) output

capacitors, such as POSCAP or SP-CAP, and ultra-

•

High Efficiency, less than 10

μA at shutdown

low ESR ceramic capacitors. The device operates

•

High Initial Bandgap Reference Accuracy

from 4.5-V to 23-V VIN input. The output voltage can

•

Adjustable Soft Start

be programmed between 0.76 V and 7 V. The device

also features an adjustable soft start time. The

•

Pre-Biased Soft Start

TPS54239 is available in the 8-pin DDA package,

•

and designed to operate from –40°C to 85°C.

•

Cycle By Cycle Over Current Limit

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)

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 is a trademark 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 © 2013, 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.