Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TPS61040 Datasheet(PDF) 12 Page - Texas Instruments

Part # TPS61040
Description  LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES
Download  22 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS61040 Datasheet(HTML) 12 Page - Texas Instruments

Back Button TPS61040_07 Datasheet HTML 8Page - Texas Instruments TPS61040_07 Datasheet HTML 9Page - Texas Instruments TPS61040_07 Datasheet HTML 10Page - Texas Instruments TPS61040_07 Datasheet HTML 11Page - Texas Instruments TPS61040_07 Datasheet HTML 12Page - Texas Instruments TPS61040_07 Datasheet HTML 13Page - Texas Instruments TPS61040_07 Datasheet HTML 14Page - Texas Instruments TPS61040_07 Datasheet HTML 15Page - Texas Instruments TPS61040_07 Datasheet HTML 16Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 12 / 22 page
background image
www.ti.com
LINE AND LOAD REGULATION
OUTPUT CAPACITOR SELECTION
DVout +
Iout
Cout
1
fS(Iout)
I
P
L
Vout ) Vd–Vin
) IP
ESR
(7)
TPS61040
TPS61041
SLVS413C – OCTOBER 2002 – REVISED AUGUST 2007
The larger the feedforward capacitor the worse the line regulation of the device. Therefore, when concern for line
regulation is paramount, the selected feedforward capacitor should be as small as possible. See the LINE AND
LOAD REGULATION section for more information about line and load regulation.
The line regulation of the TPS61040/41 depends on the voltage ripple on the feedback pin. Usually a 50 mV
peak-to-peak voltage ripple on the feedback pin FB gives good results.
Some applications require a very tight line regulation and can only allow a small change in output voltage over a
certain input voltage range. If no feedforward capacitor CFF is used across the upper resistor of the voltage
feedback divider, the device has the best line regulation. Without the feedforward capacitor the output voltage
ripple is higher because the TPS61040/41 shows output voltage bursts instead of single pulses on the switch pin
(SW), increasing the output voltage ripple. Increasing the output capacitor value reduces the output voltage
ripple.
If a larger output capacitor value is not an option, a feedforward capacitor CFF can be used as described in the
previous section. The use of a feedforward capacitor increases the amount of voltage ripple present on the
feedback pin (FB). The greater the voltage ripple on the feedback pin (
≥50 mV), the worse the line regulation.
There are two ways to improve the line regulation further:
1. Use a smaller inductor value to increase the switching frequency which will lower the output voltage ripple,
as well as the voltage ripple on the feedback pin.
2. Add a small capacitor from the feedback pin (FB) to ground to reduce the voltage ripple on the feedback pin
down to 50 mV again. As a starting point, the same capacitor value as selected for the feedforward capacitor
CFF can be used.
For best output voltage filtering, a low ESR output capacitor is recommended. Ceramic capacitors have a low
ESR value but tantalum capacitors can be used as well, depending on the application.
Assuming the converter does not show double pulses or pulse bursts on the switch node (SW), the output
voltage ripple can be calculated as:
where:
IP = Peak current as described in the Peak Current Control section
L = Selected inductor value
Iout = Nominal load current
fS (Iout) = Switching frequency at the nominal load current as calculated previously
Vd = Rectifier diode forward voltage (typically 0.3 V)
Cout = Selected output capacitor
ESR = Output capacitor ESR value
See Table 4 and the typical applications section for choosing the output capacitor.
Table 4. Recommended Input and Output Capacitors
DEVICE
CAPACITOR
VOLTAGE RATING
COMPONENT SUPPLIER
COMMENTS
4.7
μF/X5R/0805
6.3 V
Tayo Yuden JMK212BY475MG
CIN/COUT
10
μF/X5R/0805
6.3 V
Tayo Yuden JMK212BJ106MG
CIN/COUT
TPS61040/41
1
μF/X7R/1206
25 V
Tayo Yuden TMK316BJ105KL
COUT
1
μF/X5R/1206
35 V
Tayo Yuden GMK316BJ105KL
COUT
4.7
μF/X5R/1210
25 V
Tayo Yuden TMK325BJ475MG
COUT
12
Submit Documentation Feedback
Copyright © 2002–2007, Texas Instruments Incorporated
Product Folder Link(s): TPS61040 TPS61041


Similar Part No. - TPS61040_07

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS61040-Q1 TI-TPS61040-Q1 Datasheet
288Kb / 18P
[Old version datasheet]   LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
TPS61040-Q1 TI-TPS61040-Q1 Datasheet
797Kb / 24P
[Old version datasheet]   LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
TPS61040-Q1 TI-TPS61040-Q1 Datasheet
707Kb / 28P
[Old version datasheet]   TPS6104x-Q1 Low-Power DC-DC Boost Converter in SOT-23 Package
REVISED MARCH 2016
TPS61040-Q1 TI-TPS61040-Q1_15 Datasheet
797Kb / 24P
[Old version datasheet]   LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
TPS61040-Q1 TI1-TPS61040-Q1_16 Datasheet
1,013Kb / 27P
[Old version datasheet]   Low-Power DC-DC Boost Converter in SOT-23 Package
More results

Similar Description - TPS61040_07

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS61040DDCR TI-TPS61040DDCR Datasheet
977Kb / 27P
[Old version datasheet]   LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES
TPS61040 TI-TPS61040 Datasheet
299Kb / 18P
[Old version datasheet]   LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
TPS61040-Q1 TI1-TPS61040-Q1_16 Datasheet
1,013Kb / 27P
[Old version datasheet]   Low-Power DC-DC Boost Converter in SOT-23 Package
TPS61040-Q1 TI-TPS61040-Q1_15 Datasheet
797Kb / 24P
[Old version datasheet]   LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
TPS61040-Q1 TI-TPS61040-Q1 Datasheet
288Kb / 18P
[Old version datasheet]   LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE
TPS61040-Q1 TI-TPS61040-Q1_V01 Datasheet
707Kb / 28P
[Old version datasheet]   TPS6104x-Q1 Low-Power DC-DC Boost Converter in SOT-23 Package
REVISED MARCH 2016
logo
Sipex Corporation
SP6641A SIPEX-SP6641A_05 Datasheet
133Kb / 13P
   500mA Alkaline DC/DC Boost Regulator in SOT-23
logo
Exar Corporation
SP6641BEK-L-5-0-TR EXAR-SP6641BEK-L-5-0-TR Datasheet
137Kb / 14P
   500mA Alkaline DC/DC Boost Regulator in SOT-23
logo
Sipex Corporation
SP6641BEK-L-5-0 SIPEX-SP6641BEK-L-5-0 Datasheet
137Kb / 13P
   500mA Alkaline DC/DC Boost Regulator in SOT-23
SP6641AEK SIPEX-SP6641AEK Datasheet
137Kb / 13P
   500mA Alkaline DC/DC Boost Regulator in SOT-23
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com