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LTM8078 RUN Pin Input Impedance

Category: Datasheet/Specs
Product Number: LTM8078

Hello,

What is the input impedance of the RUN pin on the LTM8078 regulator? I'd like to know it's current draw for different voltages.

In the datasheet, I see that the "RUN Input Current" is listed as 1uA, but the condition for that is "RUN = 0V".  I'm not sure what that means.

Thank you!!

Robert

  • Hello,

    We dont have the RUN pin current drawn data but the fact that RUN pin can be tied to VIN which is up to 40V means that RUN should be a high impedance pin. There is also an existing LTSpice model for the part so you could try and simulate this.

    Regards,

    Nino

  • Agreed, but if you are controlling RUN with a resistive divider, it could make a difference. "High impedance" is subjective.

    Anyway, I think I found an alternate solution, but it would be interesting to know. Maybe RUN pin impedance can be added to the next rev of the datasheet (someone must know if they made a SPICE model for it).

    In any case, thank you for the reply!!

    Robert