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FEATURES

APPLICATIONS

DESCRIPTION

SIMPLIFIED SCHEMATIC

VIN

NC

NC

ENA

GND

VSENSE

BOOT

PH

TPS5430

VIN

VOUT

50

55

60

65

70

75

80

85

90

95

100

0

0.5

1

1.5

2

2.5

3

3.5

I

O −

Output Current − A

V = 12 V,

V

= 5 V,

fs = 500 kHz

I

0

Efficiency vs Output Current

TPS5430

SLVS632 – JANUARY 2006

5.5-V to 36-V, 3-A STEP-DOWN SWIFT™ CONVERTER

•

Consumer: Set-top Box, DVD, LCD Displays

•

Wide Input Voltage Range: 5.5 V to 36 V

•

Industrial and Car Audio Power Supplies

•

Up to 3-A Continuous (4-A Peak) Output

•

Battery Chargers, High Power LED Supply

Current

•

12V/24V Distributed Power Systems

•

High Efficiency up to 95% Enabled by 110-m

Ω

Integrated MOSFET Switch

•

Wide Output Voltage Range: Adjustable Down

to 1.22 V with 1.5% Initial Accuracy

As a member of the SWIFT™ family of DC/DC

regulators, the TPS5430 is a high-output-current

•

Internal Compensation Minimizes External

PWM converter that integrates a low resistance high

Parts Count

side N-channel MOSFET. Included on the substrate

•

Fixed 500 kHz Switching Frequency for Small

with the listed features are a high performance

Filter Size

voltage error amplifier that provides tight voltage

regulation accuracy under transient conditions; an

•

Improved Line Regulation and Transient

under-voltage-lockout circuit to prevent start-up until

Response by Input Voltage Feed Forward

the input voltage reaches 5.5V; an internally set

•

System Protected by Over Current Limiting

slow-start circuit to limit inrush currents; and a voltage

and Thermal Shutdown

feed-forward

circuit

to

improve

the

transient

•

–40

°C to 125°C Operating Junction

response. Other features include an active high

Temperature Range

enable,

over

current

protection

and

thermal

shutdown. To reduce design complexity and external

•

Available in Small Thermally Enhanced 8-Pin

component count, the TPS5430 feedback loop is

SOIC PowerPAD™ Package

internally compensated.

•

For SWIFT Documentation, Application Notes

The TPS5430 device is available in a thermally

and Design Software, See the TI Website at

enhanced, easy to use 8-pin SOIC PowerPAD™

www.ti.com/swift

package. TI provides evaluation modules and the

SWIFT™ Designer software tool to aid in quickly

achieving high-performance power supply designs to

meet aggressive equipment development cycles.

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.

SWIFT, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2006, 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.