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
Efficiency − %
V
IN
SW
FB
EN
GND
L1
10
m
H
D1
R1
R2
C
FF
C
O
1 mF
V
OUT
V
IN
to 28 V
V
IN
1.8 V to 6 V
C
IN
4.7 mF
5
4
2
3
1
V
O
= 18 V
Copyright © 2016, Texas Instruments Incorporated
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-μA Typical No-Load Quiescent Current
• 1-μA 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
μA) 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
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