1

FEATURES

DESCRIPTION

APPLICATIONS

3

2

4

5

DBV PACKAGE

(Top View)

1

SW

GND

FB

EN

GND

SW

NC

EN

FB

3

2

1

4

5

6

DRV PACKAGE

(Top View)

TYPICAL APPLICATION

SW

FB

EN

GND

L1

10

µH

D1

R1

R2

1

µF

1.8 V to 6.0 V

4.7

µF

70

72

74

76

78

80

82

84

86

88

90

0.10

1

10

100

EFFICIENCY

vs

OUTPUT CURRENT

5

4

2

3

1

TPS61040

TPS61041

SLVS413C – OCTOBER 2002 – REVISED AUGUST 2007

www.ti.com

LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES

• 1.8-V to 6-V Input Voltage Range

The

TPS61040/41

is

a

high-frequency

boost

converter dedicated for small to medium LCD bias

• Adjustable Output Voltage Range up to 28 V

supply and white LED backlight supplies. The device

• 400-mA (TPS61040) and 250-mA (TPS61041)

is ideal to generate output voltages up to 28 V from a

Internal Switch Current

dual cell NiMH/NiCd or a single cell Li-Ion battery.

• Up to 1-MHz Switching Frequency

The part can also be used to generate standard

3.3-V/5-V to 12-V power conversions.

• 28-μA Typical No-Load Quiescent Current

• 1-μA Typical Shutdown Current

The

TPS61040/41

operates

with

a

switching

frequency up to 1 MHz. This allows the use of small

• Internal Soft Start

external components using ceramic as well as

• Available in SOT23-5 and 2 × 2 × 0.8-mm SON

tantalum output capacitors. Together with the thin

Packages

SON package, the TPS61040/41 gives a very small

overall solution size. The TPS61040 has an internal

400 mA switch current limit, while the TPS61041 has

• LCD Bias Supply

a 250-mA switch current limit, offering lower output

voltage ripple and allows the use of a smaller form

• White-LED Supply for LCD Backlights

factor inductor for lower power applications. The low

• Digital Still Camera

quiescent current (typically 28

μA) together with an

• PDAs, Organizers, and Handheld PCs

optimized control scheme, allows device operation at

• Cellular Phones

very high efficiencies over the entire load current

range.

• Internet Audio Player

• Standard 3.3-V/5-V to 12-V Conversion

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2007, 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.