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TPS1H100-Q1: Dgnd current rate recommendation

Yuto Kitamura
Expert 6485 points
Part Number: TPS1H100-Q1

Tool/software:

Dear team,

Would I know why 100mA IF diode is recommended to resistor-diode ground network? I understand the current only flows through Dgnd when normal operation, which means not reverse or power/gnd loss situation...

I see 10mA_max is the Inom shown below. If this is the one which only should be considered, then 100mA is too much.

I already read some apps notes below, but still not clear.
https://www.ti.com/lit/an/slvaes9a/slvaes9a.pdf
https://www.ti.com/lit/an/slvae30e/slvae30e.pdf
https://www.ti.com/lit/an/slvae55/slvae55.pdf

Best regards,
Yuto Kitamura

  • +1
    TI__Prodigy 301 points

    Hi Kitamura-san,

    The 100mA value provides more than enough margin, however, you are right. You will only have 10mA going through the diode so even though that is the max, I would recommend leaving a margin for safety, 20mA or so. 

    BR,

    Ava