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LM2678 Internal diode aProtection

Anusree C
Prodigy 10 points

Is there any internal diode for protection in case of a voltage at output without an input voltage??

  • 0
    TI__Guru 73235 points

    There is a diode from the SW pin to the VIN pin.  However this is a parasitic and must not be allowed to turn on.

    So, to answer your question, No; there is no protection from a voltage on the output that is higher than the input.  An external Schottky diode can be used from Vout to Vin if desired.