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ADM1270 Reverse Supply Protection

Dear All:

The Hot-Swap have one important parameter "reverse supply protection". I want to know ADM1270 Input reverse supply protection maxim is how much?. the ADM1270 PrE datasheet page1 key Features show "Gate drive for low voltage drop reverse supply protection". It's can up to -60V?

Best Regards,
Jacky

  • Hi Jackie,

    Yes. it's a simple revers protection scheme using external PMOS.

    It clamps the gate voltage around ground level, so if Vsg>Vth (normal connection) it will conduct and Vsg<Vth (reverse polarity) the PMOS will be in threshold and prevent any current from flowing.

    The voltage level of reverse polarity protection only depends on the choice of the external FET.

    Ren