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TPS51200: thermal check

Fred Cheng
Expert 5660 points
Part Number: TPS51200

Hi team,

would you help check if below spec has thermal risk,

Vin=1.2

vout=0.6V

Iout=1.5A

Ta=61C.

since the ambient temperature is quite high,

 would you help check the risk  for me? 

  • 0
    TI__Mastermind 28200 points

    Hello,

    I believe you meant VLDOIN = 1.2V. The power losses in the device Pd = (VLDOIN - VOUT)*IOUT and Pd = 0.6V*1.5A = 0.9W.

    Junction to ambient thermal resistance is 55.6C/W and the junction temperature rise is 55.6C/W * 0.9W = 50C.

    At ambient temperature of 61C, the junction temperature is 61C + 50C = 111C. It is below the thermal shutdown of 150C. There is no thermal risk.

    Please close this thread as resolved if your question is answered and let me know for further support. 

    Regards

  • 0 in reply to Mahmoud Harmouch
    TI__Expert 4175 points

    Hello,

    We have not heard from you for a while. We will close this thread. Please create a new thread if you have additional questions.

    Regards,

    Sam Gradinaru