Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TPS79428DCQR Datasheet(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
Part # TPS79428DCQR
Description  ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS79428DCQR Datasheet(HTML) 11 Page - Texas Instruments

Back Button TPS79428DCQR Datasheet HTML 7Page - Texas Instruments TPS79428DCQR Datasheet HTML 8Page - Texas Instruments TPS79428DCQR Datasheet HTML 9Page - Texas Instruments TPS79428DCQR Datasheet HTML 10Page - Texas Instruments TPS79428DCQR Datasheet HTML 11Page - Texas Instruments TPS79428DCQR Datasheet HTML 12Page - Texas Instruments TPS79428DCQR Datasheet HTML 13Page - Texas Instruments TPS79428DCQR Datasheet HTML 14Page - Texas Instruments TPS79428DCQR Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 23 page
background image
www.ti.com
T
J
+ TA ) PD max
RθJA
(6)
RθJA +
T
J
* TA
P
D max
(7)
P
D max
+ (3.3 * 2.5) V
1A + 800mW
(8)
RθJA max + (125 * 55)°C 800mW + 87.5°C W
0
100
120
140
160
180
No Air Flow
80
60
40
20
0.1
1
10
PCB Copper Area (in2)
SOT223 POWER DISSIPATION
0
1
2
3
6
0
25
50
75
100
150
125
TA = 25°C
TA − Ambient Temperature (°C)
4
5
4 in2 PCB Area
0.5 in2 PCB Area
TPS794xx
SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005
Equation 5 simplifies into Equation 6:
applications. The SOT223 package dimensions are
provided in the Mechanical Data section at the end
of the data sheet. The addition of a copper plane
Rearranging Equation 6 gives Equation 7:
directly underneath the SOT223 package enhances
the thermal performance of the package.
To illustrate, the TPS79425 in a SOT223 package
was chosen. For this example, the average input
Using Equation 6 and the computer model generated
voltage is 3.3 V, the output voltage is 2.5 V, the
curves shown in Figure 25, a designer can quickly
average
output
current
is
1
A,
the
ambient
compute
the
required
heatsink
thermal
temperature 55
°C, no air flow is present, and the
resistance/board
area
for
a
given
ambient
operating environment is the same as documented
temperature,
power
dissipation,
and
operating
below.
Neglecting
the
quiescent
current,
the
environment.
maximum average power is Equation 8:
Substituting TJmax for TJ into Equation 4 gives
Equation 9:
(9)
From Figure 25, RθJA vs PCB Copper Area, the
ground plane needs to be 0.55 in2 for the part to
dissipate 800 mW. The operating environment used
to construct Figure 25 consisted of a board with 1 oz.
copper planes. The package is soldered to a 1 oz.
copper pad on the top of the board. The pad is tied
through thermal vias to the 1 oz. ground plane.
From the data in Figure 25 and rearranging equation
6, the maximum power dissipation for a different
ground
plane
area
and
a
specific
ambient
temperature
can
be
computed,
as
shown
in
Figure 26.
Figure 25. SOT223 Thermal Resistance vs PCB
Copper Area
The SOT223 package provides an effective means
of managing power dissipation in surface-mount
Figure 26. SOT223 Maximum Power Dissipation
vs Ambient Temperature
11
Submit Documentation Feedback


Similar Part No. - TPS79428DCQR

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS79428DCQR TI-TPS79428DCQR Datasheet
487Kb / 15P
[Old version datasheet]   ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR REGULATORS
More results

Similar Description - TPS79428DCQR

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS79401 TI-TPS79401 Datasheet
487Kb / 15P
[Old version datasheet]   ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR REGULATORS
TPS79401 TI-TPS79401_15 Datasheet
1Mb / 23P
[Old version datasheet]   ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
TPS79418 TI-TPS79418_15 Datasheet
1Mb / 23P
[Old version datasheet]   ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
TPS79425 TI-TPS79425_15 Datasheet
1Mb / 23P
[Old version datasheet]   ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
TPS79428 TI-TPS79428_15 Datasheet
1Mb / 23P
[Old version datasheet]   ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
TPS79430 TI-TPS79430_15 Datasheet
1Mb / 23P
[Old version datasheet]   ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
TPS79301-Q1 TI-TPS79301-Q1 Datasheet
308Kb / 16P
[Old version datasheet]   ULTRALOW-NOISE HIGH-PSRR FAST-RF 200-mA LOW-DROPOUT LINEAR REGULATORS
TPS79225 TI-TPS79225 Datasheet
134Kb / 13P
[Old version datasheet]   ULTRALOW-NOISE, HIGH PSRR, FAST RF 100-mA LOW-DROPOUT LINEAR REGULATORS
TPS79301-EP TI1-TPS79301-EP_16 Datasheet
931Kb / 21P
[Old version datasheet]   ULTRALOW-NOISE, HIGH-PSRR, FAST RF 200-mA LOW-DROPOUT LINEAR REGULATORS
TPS79501 TI-TPS79501 Datasheet
432Kb / 15P
[Old version datasheet]   ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA LOW-DROPOUT LINEAR 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 23


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