1A Ultra Low Dropout Linear Regulator
TJ3964
The maximum allowable power dissipation is also influenced by the ambient temperature. With the
above θJA-Copper plane area relationship, the maximum allowable power dissipation could be evaluated
with respect to the ambient temperature. As shown in graph, the higher copper plane area leads θJA.
And the higher ambient temperature leads lower maximum allowable power dissipation.
All this relationship is based on the aforesaid equation ; θJA = TRmax / PD = (TJmax – TAmax) / PD
T.B.D
Dec. 2009 – Rev. 1.1
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HTC