1

FEATURES

APPLICATIONS

DESCRIPTION

VIN

NC

NC

ENA

GND

VSENSE

BOOT

PH

TPS5420

VIN

VOUT

95

60

70

80

90

100

0

0.5

1

1.5

2.5

3

I

OutputCurrent

A

O

-

-

EfficiencyvsOutputCurrent

SimplifiedSchematic

2

50

55

65

75

85

V

TPS5420-Q1

2-A WIDE-INPUT-RANGE STEP-DOWN SWIFT™ CONVERTER

• Industrial and Car Audio Power Supplies

2

• Qualified for Automotive Applications

• Battery Chargers, High-Power LED Supplies

• Wide Input Voltage Range: 5.5 V to 36 V

• 12-V/24-V Distributed Power Systems

• Up to 2-A Continuous (3-A Peak) Output

Current

• High Efficiency up to 95% Enabled by 110-mΩ

As a member of the SWIFT family of dc/dc regulators,

Integrated MOSFET Switch

the TPS5420 is a high-output-current PWM converter

• Wide Output Voltage Range: Adjustable Down

that integrates a low-resistance high-side N-channel

to 1.22 V With 1.5% Initial Accuracy

MOSFET. Included on the substrate with the listed

• Internal Compensation Minimizes External

features is a high-performance voltage error amplifier

Parts Count

that provides tight voltage regulation accuracy under

transient conditions, an undervoltage-lockout circuit to

• Fixed 500-kHz Switching Frequency for Small

prevent start-up until the input voltage reaches 5.5 V,

Filter Size

an internally set slow-start circuit to limit inrush

• Improved Line Regulation and Transient

currents,

and

a

voltage

feed-forward

circuit

to

Response by Input Voltage Feed Forward

improve the transient response. Using the ENA pin,

• System Protected by Over Current Limiting,

shutdown supply current is reduced to 18

µA

typically.

Other

features

include

an

active-high

Over Voltage Protection, and Thermal

enable, overcurrent limiting, overvoltage protection,

Shutdown

and thermal shutdown. To reduce design complexity

• –40°C to 125°C Operating Junction

and

external

component

count,

the

TPS5420

Temperature Range

feedback loop is internally compensated.

• Available in Small 8-Pin SOIC Package

The TPS5420 device is available in an easy-to-use

• For SWIFT™ Documentation, Application

8-pin SOIC package. TI provides evaluation modules

Notes and Design Software, See the TI Website

and the SWIFT Designer software tool to aid in

at www.ti.com/swift

quickly achieving high-performance power supply

designs to meet aggressive equipment development

cycles.

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 © 2007–2008, 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.