Thursday, March 30, 2023

LM1117 heat problem

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  • December 16, 2021 at 1:56 pm #87410
    Cecelia Anne
    Participant

      I use LM1117 as the power output of 3.3V and 5.0V, but the heat is very severe, and the hand is very hot. What is the problem? The 1117 used on the development board that I bought does not cause serious heat problems.

      Reading some related information including its specification and parameter about the LM1117 may help you answer my question more quickly.

      January 20, 2022 at 1:23 pm #89957
      Ronie1988
      Moderator

        LM1117 is linear regulator with low drop. However the factors are input voltage and high current. The regulated voltage is output and the the difference of input and regulated voltage is dissipated in form of heat when multiplied with current. Please use heat sink or lower input voltage as per datasheet.

        March 13, 2022 at 11:40 am #92323
        vishelec
        Participant

          can you please share what is the input you are providing and how much current you are drawing at the load side….

          April 15, 2022 at 2:59 pm #94558
          harpersophia
          Participant

            I have got the same problem. Did you have got the solution? Plz share it with me.

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