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TPS25221: Reverse current blocking operation of TPS25221

takahiko yokota
Mastermind 7135 points
Part Number: TPS25221

Hi

I have a question about TPS25221.
This device has reverse current blocking when disabled.
Could you tell me this detailed operation?

Best regards,
Yokota
  • 0
    TI__Expert 3135 points

    Hi Yokota,

    The substrate of the switch MOS tube inside TPS25221 is independently grounded, so its body diode is a pair of reverse diode when Disable, so it has the ability of reverse current protection.

    Best Regards,

    Kevin

  • 0
    TI__Mastermind 18031 points

    Hi Yokota,

    The part uses back to back MOS structure as following shown.

    Apply Vin=3v and Vout=5V to creat the reverse condition.

    As disabled, Mos will turn off.  Due to we use back to back structure, the reverse current will be blocked by the parasitic diode.

    If any, contact me any time.

    Thanks.

    Ziv

  • 0 in reply to Ziv Zhang
    TI__Expert 3135 points
    Hi Yokota,
    Since I don't receive your feedback for several days, i will close this item. If you have any other question, please feel free to contact me .

    Kevin
    If this answers your query, Please click "This resolved my issue" button.