Datasheet

J A
JA
MAX
ON
T T
I
R
-
q
=
TPS22929
www.ti.com SLVSB39 –DECEMBER 2011
Thermal Considerations
For best device performance, be sure to follow the thermal guidelines in the Thermal Information table on page
4. To calculate max allowable continuous current for your application for a specific V
IN
and ambient temperature,
use the following formula:
Where:
I
MAX
= Max allowable continuous current
T
J
= Max thermal junction temperature (125°C)
T
A
= Ambient temperature of the application
θ
JA
= Junction-to-air thermal impedance (216°C/W)
R
ON
= R
ON
at a specified input voltage VIN (see Electrical Characteristics table on page 5)
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