3
2
4
5
DDC, DBV PACKAGE
(Top View)
1
SW
GND
FB
V
IN
EN
GND
SW
V
IN
NC
EN
FB
3
2
1
4
5
6
DRV PACKAGE
(Top View)
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
µ
H
D1
R1
R2
C
FF
C
O
1
µ
F
V
OUT
V
IN
to 28 V
V
IN
1.8 V to 6 V
C
IN
4.7
µ
F
5
4
2
3
1
V
O
= 18 V
TPS61040
TPS61041
www.ti.com
SLVS413F – OCTOBER 2002 – REVISED DECEMBER 2010
LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES
Check for Samples:
TPS61040
,
TPS61041
1
FEATURES
DESCRIPTION
•
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-
m
A Typical No-Load Quiescent Current
•
1-
m
A 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, TSOT23-5,
tantalum output capacitors. Together with the thin
and 2 × 2 × 0.8-mm SON Packages
SON package, the TPS61040/41 gives a very small
overall solution size. The TPS61040 has an internal
APPLICATIONS
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
m
A) 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
TYPICAL APPLICATION
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 © 2002–2010, 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.
