50

55

60

65

70

75

80

85

90

95

100

0

0.4

0.8

1.2

1.6

2

2.4

Output Current (A)

G031

TPS55340

VIN

EN

SW

SW

SW

FREQ

SS

COMP

SYNC

FB

PGND

PGND

PGND

L

D

AGND

TPS55340

www.ti.com

SLVSBD4B – MAY 2012 – REVISED OCTOBER 2012

Integrated 5-A 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator

Check for Samples: TPS55340

1

FEATURES

DESCRIPTION

The TPS55340 is a monolithic non-synchronous

2

•

Internal 5-A, 40-V Low-Side MOSFET Switch

switching regulator with integrated 5-A, 40-V power

•

2.9-V to 32-V Input Voltage Range

switch. It can be configured in several standard

•

±0.7% Reference Voltage

switching-regulator

topologies,

including

boost,

SEPIC and isolated flyback. The device has a wide

•

0.5mA Operating Quiescent Current

input voltage range to support applications with input

•

2.7µA Shutdown Supply Current

voltage from multi-cell batteries or regulated 3.3-V, 5-

•

Fixed Frequency Current Mode PWM Control

V, 12-V, and 24-V power rails.

•

Frequency Adjustable from 100kHz to 1.2MHz

The TPS55340 regulates the output voltage with

•

Synchronization Capability to External Clock

current mode PWM (pulse width modulation) control,

and

has

an

internal

oscillator.

The

switching

•

Adjustable Soft-Start Time

frequency of PWM is set by either an external resistor

•

Pulse-Skipping for Higher Efficiency at Light

or by synchronizing to an external clock signal. The

Loads

user can program the switching frequency from 100

•

Cycle-by-Cycle Current Limit, Thermal

kHz to 1.2 MHz.

Shutdown, and UVLO Protection

The

device

features

a

programmable

soft-start

•

QFN-16 (3mmx3mm) and HTSSOP-14

function to limit inrush current during start-up and has

Packages with PowerPad™

other built-in protection features including cycle-by-

cycle over current limit and thermal shutdown.

•

The TPS55340 is available in a small 3mm x 3mm

APPLICATIONS

16-pin QFN as well as 14-pin HTSSOP packages

with PowerPad™ for enhanced thermal performance.

•

3.3-V, 5-V, 12-V, 24-V Power Conversion

The 5-A, 40-V TPS55340 Boost Converter in the

•

Boost, SEPIC, and Flyback Topologies

HTSSOP-14 package is pin-to-pin compatible with

•

Thunderbolt Port, Power Docking for Tablets

the 3-A, 40-V TPS61175 and it extends the maximum

and Portable PCs

input voltage from 18 V to 32 V.

•

Industrial Power Systems

•

ADSL Modems

TYPICAL APPLICATION (BOOST)

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

PowerPad is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, 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.