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TPS61040-Q1_16

更新时间： 2024-01-28 20:01:02
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德州仪器 - TI /
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18页 289K
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Low-Power DC-DC Boost Converter in SOT-23 Package

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TPS61040-Q1_16 数据手册

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TPS61040-Q1  
TPS61041-Q1  
www.ti.com  
SGLS276–JANUARY 2005  
LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE  
FEATURES  
DESCRIPTION  
•
•
•
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  
•
•
•
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  
•
•
•
•
•
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)  
•
•
•
•
•
•
•
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.  
1234567...18

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