**Part Number:**TPS7A90

Hi Team

I don't find the power dissipation graph for TPS7A90, do we have any available information regarding this?

The datasheet does mention R_{θJA}＝56.9（℃/W) though, if to draw the graph, then P_{Dmax} =125(℃)/ 56. 9 (℃/W)=2.197 W, with the slope=1/ R_{θJA} =1/56.9 W/℃.

For the case when the power dissipation P_{D}＝0.7W, ambient temperature T_{a}=45℃, the junction temperature would be T_{j}=T_{a} + R_{θJA}✕P_{D}=45 + 56.9 X 0.7 = 84.8（℃）.

If calculate with the power dissipation graph obtain from above, then the power dissipation would be 1.933W, and therefore the power dissipation margin would be 1-(0.7／1.933) = 64％.

Could you confirm if the calculation above is correct?

Regards

David