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SLVS413F – OCTOBER 2002 – REVISED DECEMBER 2010
LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES
Check for Samples:
1
FEATURES
1.8-V to 6-V Input Voltage Range
Adjustable Output Voltage Range up to 28 V
400-mA (TPS61040) and 250-mA (TPS61041)
Internal Switch Current
Up to 1-MHz Switching Frequency
28-mA Typical No-Load Quiescent Current
1-mA Typical Shutdown Current
Internal Soft Start
Available in SOT23-5, TSOT23-5,
and 2 × 2 × 0.8-mm SON Packages
DESCRIPTION
The TPS61040/41 is a high-frequency boost
converter dedicated for small to medium LCD bias
supply and white LED backlight supplies. The device
is ideal to generate output voltages up to 28 V from a
dual cell NiMH/NiCd or a single cell Li-Ion battery.
The part can also be used to generate standard
3.3-V/5-V to 12-V power conversions.
The TPS61040/41 operates with a switching
frequency up to 1 MHz. This allows the use of small
external components using ceramic as well as
tantalum output capacitors. Together with the thin
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
a 250-mA switch current limit, offering lower output
voltage ripple and allows the use of a smaller form
factor inductor for lower power applications. The low
quiescent current (typically 28
mA)
together with an
optimized control scheme, allows device operation at
very high efficiencies over the entire load current
range.
DDC, DBV PACKAGE
(Top View)
DRV PACKAGE
(Top View)
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APPLICATIONS
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LCD Bias Supply
White-LED Supply for LCD Backlights
Digital Still Camera
PDAs, Organizers, and Handheld PCs
Cellular Phones
Internet Audio Player
Standard 3.3-V/5-V to 12-V Conversion
SW
GND
FB
1
2
3
5
V
IN
GND
V
IN
1
2
3
6
5
4
SW
NC
FB
4
EN
EN
TYPICAL APPLICATION
EFFICIENCY
vs
OUTPUT CURRENT
L1
10
µH
90
D1
V
OUT
V
IN
to 28 V
1
3
2
R1
Efficiency − %
88
86
84
82
80
78
76
V
O
= 18 V
V
IN
1.8 V to 6 V
V
I
= 5 V
C
FF
C
O
1
µF
V
I
= 3.6 V
5 V
IN
SW
FB
V
I
= 2.4 V
C
IN
4.7
µF
4
EN
GND
R2
74
72
70
0.1
1
10
I
O
− Output Current − mA
100
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2002–2010, Texas Instruments Incorporated
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