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LP38691-Q1: Maximum reverse current

Toshio Ushikubo
Mastermind 9620 points
Part Number: LP38691-Q1
Other Parts Discussed in Thread: LP38691

Hello,

 

Datasheet has following explanation about reverse current.

“The current in the parasitic diode must be limited to less than 1-A continuous and 5-A peak.”

 

Please advise the duration that LP38691-Q1 can withstand 5A reverse current.

 

Best Regards.

  • 0
    TI__Mastermind 23361 points
    Hi Toshio-San,

    We are looking into this, please allow some time for us to respond.

    Regards,
    Jason
  • 0
    TI__Mastermind 22610 points

    Hello Toshio-San,

    First the disclaimers: Reverse current capability through the LP38691 is not an ensured, or characterized, parameter. Reverse current through the LP38691 is not encouraged.

    The 5-A peak current was derived from simulations done by the original design team, and represent the discharge of a large value Cout through the LP38691 by abruptly taking Vin to 0.0V. As such, there is a distinct RC decay to the current through the device.

    Duration of the 5A peak is limited to no more than 1 milli-second.