TLV71333P Power Dissipation(Thermal information)

Hi Shimizu-san,

Given P_D = (V_OUT - V_IN) I_OUT, your P_D is 5.1 mW, assuming an ambient temperature of 85°C TLV713 meets the thermal requirements (thermals would be even better at lower ambient temperatures).

Additionally you can estimate the Junction Temperature (T_J) based on your experimental temperature readings. I am assuming your measured the temperature on top of the IC.

Using the following equation we can estimate T_J:

Ψ_JT : T_J = T_T + Ψ_JT * P_D      

Where:
- Ψ_JT is a thermal metric provided in the datasheet for estimating T_J.
- T_T is the temperature at the center-top of the device package.
- P_D is the power dissipated by your device.

T_J = 49.9°C + Ψ_JT * 5.1 mW, so in the worst case scenario for this device your T_J is 50.15°C, which within the operating conditions for T_J (-40°C to 125°C). Your P_D is so relatively small that T_T will be approximately equal to the T_J, all your costumer has to make sure is that T_J is within the operating range (-40°C to 125°C).

References:
- Semiconductor and IC Package Thermal Metrics application report, SPRA953

Regards,
Victor