70
72
74
76
78
80
82
84
86
88
90
0.1
1
10
100
V
I
= 5 V
V
I
= 3.6 V
V
I
= 2.4 V
Efficiency vs Output Current
I
O
− Output Current − mA
E
ff
ic
ie
n
c
y
−
%
V
IN
SW
FB
EN
GND
L1
10
m
H
D1
R1
R2
C
FF
C
O
1
m
F
V
OUT
V
IN
to 28 V
V
IN
1.8 V to 6 V
C
IN
4.7
m
F
5
4
2
3
1
V
O
= 18 V
Copyright © 2016, Texas Instruments Incorporated
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS61040, TPS61041
SLVS413I – OCTOBER 2002 – REVISED DECEMBER 2016
TPS6104x Low-Power DC-DC Boost Converter in SOT-23 and WSON Packages
1
1 Features
1
•
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-
μ
A Typical No-Load Quiescent Current
•
1-
μ
A Typical Shutdown Current
•
Internal Soft Start
•
Available in SOT23-5, TSOT23-5,
and 2-mm × 2-mm × 0.8-mm WSON Packages
2 Applications
•
LCD Bias Supply
•
White-LED Supply for LCD Backlights
•
Digital Still Camera
•
PDAs, Organizers, and Handheld PCs
•
Cellular Phones
•
Internet Audio Players
•
Standard 3.3-V or 5-V to 12-V Conversion
3 Description
The TPS6104x 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 or 5-V
to 12-V power conversions.
The TPS6104x operates with a switching frequency
up to 1 MHz. This frequency allows the use of small
external components using ceramic as well as
tantalum output capacitors. Together with the thin
WSON package, the TPS6104x gives a very small
overall solution size. The TPS61040 device has an
internal
400-mA
switch
current
limit,
while
the
TPS61041 device 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
μ
A) together with an optimized control scheme,
allows device operation at very high efficiencies over
the entire load current range.
Device Information
(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61040
SOT-23 (5)
2.90 mm × 1.60 mm
SOT (5)
2.90 mm ×1.60 mm
WSON (6)
2.00 mm × 2.00 mm
TPS61041
SOT-23 (5)
2.90 mm ×1.60 mm
WSON (6)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Schematic
