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TPS22916: Reverse current blocking when Vin=0

David Keck
Prodigy 30 points
Part Number: TPS22916

Hello,

I'm using the TPS22916CNYFP PSpice model and noticed that reverse current blocking doesn't seem to work when Vin=0. Here's a simple test:

According to the datasheet, the "VIN Reverse Leakage Current" is 300nA, but the simulation shows 46A.

Is this the actual behavior of the chip?

Thanks,

David

  • +1
    TI__Mastermind 32650 points

    Hi David,

    This is not the actual behavior of the device. I believe this may be some artifact of the PSPICE model or of the simulation setup here. I will look into this PSPICE issue but at this time, I was able to confirm RCB behavior with a rising voltage on the output and an input at 3V. I believe it might be an edge case event as there is a voltage at t=0 when the simulation start and VIN=0.

    In silicon, the device RCB is always ON. This means that if an acceptable voltage is present on the VIN or VOUT rails, the RCB block is powered and prevents any backflow of current. 

    Please use a TPS22916EVM for any measurement if needed.

    Thanks,

    Shreyas

  • 0 in reply to Shreyas Dmello
    Prodigy 30 points

    Thank you Shreyas, that's very helpful!