Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TPS72518KTTR Datasheet(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
Part # TPS72518KTTR
Description  LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
Download  22 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS72518KTTR Datasheet(HTML) 10 Page - Texas Instruments

Back Button TPS72518KTTR Datasheet HTML 6Page - Texas Instruments TPS72518KTTR Datasheet HTML 7Page - Texas Instruments TPS72518KTTR Datasheet HTML 8Page - Texas Instruments TPS72518KTTR Datasheet HTML 9Page - Texas Instruments TPS72518KTTR Datasheet HTML 10Page - Texas Instruments TPS72518KTTR Datasheet HTML 11Page - Texas Instruments TPS72518KTTR Datasheet HTML 12Page - Texas Instruments TPS72518KTTR Datasheet HTML 13Page - Texas Instruments TPS72518KTTR Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 22 page
background image
www.ti.com
Regulator Protection
THERMAL INFORMATION
P
D
max + VI(avg) * VO(avg)
I
O(avg) )
V
I(avg)
x I
(Q)
(3)
TPS72501
TPS72515, TPS72516
TPS72518, TPS72525
SLVS341D – MAY 2002 – REVISED MARCH 2004
APPLICATION INFORMATION (continued)
The TPS725xx pass element has a built-in back diode that safely conducts reverse current when the input
voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the
input and is not internally limited. If extended reverse voltage is anticipated, external limiting might be
appropriate.
The TPS725xx also features internal current limiting and thermal protection. During normal operation, the
TPS725xx limits output current to approximately 1.6 A. When current limiting engages, the output voltage scales
back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device
failure, care should be taken not to exceed the power dissipation ratings of the package. If the temperature of the
device exceeds 165
°C, thermal-protection circuitry shuts it down. Once the device has cooled down to below
145
°C, regulator operation resumes.
The amount of heat that an LDO linear regulator generates is directly proportional to the amount of power it
dissipates during operation. All integrated circuits have a maximum allowable junction temperature (TJmax)
above which normal operation is not assured. A system designer must design the operating environment so that
the operating junction temperature (TJ) does not exceed the maximum junction temperature (TJmax). The two
main environmental variables that a designer can use to improve thermal performance are air flow and external
heatsinks. The purpose of this information is to aid the designer in determining the proper operating environment
for a linear regulator that is operating at a specific power level.
In general, the maximum expected power (PD(max)) consumed by a linear regulator is computed as:
Where:
VI(avg) is the average input voltage.
VO(avg) is the average output voltage.
IO(avg) is the average output current.
I(Q) is the quiescent current.
For most TI LDO regulators, the quiescent current is insignificant compared to the average output current;
therefore, the term VI(avg) x I(Q) can be neglected. The operating junction temperature is computed by adding the
ambient temperature (TA) and the increase in temperature due to the regulator's power dissipation. The
temperature rise is computed by multiplying the maximum expected power dissipation by the sum of the thermal
resistances between the junction and the case (RθJC), the case to heatsink (RθCS), and the heatsink to ambient
(RθSA). Thermal resistances are measures of how effectively an object dissipates heat. Typically, the larger the
device, the more surface area available for power dissipation and the lower the object's thermal resistance.
Figure 20 illustrates these thermal resistances for (a) a SOT223 package mounted in a JEDEC low-K board, and
(b) a DDPAK package mounted on a JEDEC high-K board.
10


Similar Part No. - TPS72518KTTR

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS72518KTTR TI1-TPS72518KTTR Datasheet
1Mb / 29P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72518KTTRG3 TI1-TPS72518KTTRG3 Datasheet
1Mb / 29P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
More results

Similar Description - TPS72518KTTR

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS726126 TI-TPS726126 Datasheet
445Kb / 16P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72501 TI1-TPS72501_16 Datasheet
1Mb / 29P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72615 TI-TPS72615 Datasheet
441Kb / 15P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS726126 TI1-TPS726126_16 Datasheet
992Kb / 23P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72501 TI-TPS72501_15 Datasheet
1,010Kb / 29P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72616DCQRG4 TI-TPS72616DCQRG4 Datasheet
740Kb / 23P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72501 TI-TPS72501 Datasheet
535Kb / 18P
[Old version datasheet]   LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
logo
ams AG
AS1353 AMSCO-AS1353_04 Datasheet
726Kb / 14P
   Linear Low-Dropout 150mA Voltage Regulators
AS1353 AMSCO-AS1353 Datasheet
80Kb / 2P
   Linear Low-Dropout 150mA Voltage Regulators
logo
Unisonic Technologies
LD3117 UTC-LD3117 Datasheet
219Kb / 4P
   500mA LOW DROPOUT LINEAR VOLTAGE REGULATORS
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.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   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