TPS61040-Q1
TPS61041-Q1
www.ti.com
SGLS276–JANUARY 2005
LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
FEATURES
DESCRIPTION
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•
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Qualification in Accordance With AEC-Q100(1)
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.
Qualified For Automotive Application
Customer-Specifc Configuration Control Can
Be Supported Along With Major-Change
Approval
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1.8-V to 6-V Input Voltage Range
Adjustable Output Voltage Range Up to 28 V
The TPS61040/41 operates with a switching fre-
quency up to 1 MHz. This allows the use of small
external components using ceramic as well as tanta-
lum output capacitors. Together with the tiny SOT23
package, the TPS61040/41 gives a 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 µA) together with an
optimized control scheme, allows device operation at
high efficiencies over the entire load current range.
400-mA (TPS61040) and 250-mA (TPS61041)
Internal Switch Current
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Up to 1-MHz Switching Frequency
28-µA Typical No Load Quiescent Current
1-µA Typical Shutdown Current
Internal Softstart
Available in a Tiny 5-Pin SOT23 Package
(1)Contact Texas Instruments for details. Q100
qualification data available on request.
APPLICATIONS
DBV PACKAGE
(TOP VIEW)
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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
1
2
3
5
4
V
IN
SW
GND
FB
EN
Standard 3.3 V/5 V to 12 V Conversion
TYPICAL APPLICATION
EFFICIENCY
vs
OUTPUT CURRENT
90
88
86
84
82
80
78
76
74
72
70
L1
10 µH
V
= 18 V
D1
O
V = 5 V
I
V
V
OUT
V
IN
to 28 V
IN
1.8 V to 6.0 V
V = 3.6 V
I
C
FF
R1
1
3
2
5
4
V
SW
IN
C
1 µF
O
V = 2.4 V
I
FB
C
4.7 µF
IN
EN
GND
R2
0.10
1
10
100
I
- Output Current - mA
O
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 © 2005, 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.