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LM5156: FET of Typical Start-Stop Application

Dice-K
Mastermind 6600 points
Part Number: LM5156

Hi support team,

Do we need the FET below the FB resistor in the application shown below?

Regards,
Dice-K

  • +1
    TI__Mastermind 46251 points

    Hi Dice,

    thank you for using the E2E forum.

    The FET there is just to avoid a constant current through the Feedback voltage divider, when the controller is disabled.
    So this depends on your requirements for the current consumption in the off condition.

    Best regards,

     Stefan