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Default on power switch

I want to design an easy power switch that is on by default, but I need the ability to turn the power off.

Is this posible with a few mosfet's?

thanks for any help

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  •      Hello LucaV,

         The ADP197 is an excellent choice and a lot easier than three MOSFETs.  Thank you for recommending it.  I had looked at ADI's product list under Power Management (reproduced below), and concluded that ADI just doesn't make high-side switch ICs.  Turns out they're under Hot-Swap  -- what?   High-side switches have lots more uses than just hot-swap.

         A search for "high-side switch" would have worked but I didn't think of it at the time.

         Best regards,

         Bob

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  •      Hello LucaV,

         The ADP197 is an excellent choice and a lot easier than three MOSFETs.  Thank you for recommending it.  I had looked at ADI's product list under Power Management (reproduced below), and concluded that ADI just doesn't make high-side switch ICs.  Turns out they're under Hot-Swap  -- what?   High-side switches have lots more uses than just hot-swap.

         A search for "high-side switch" would have worked but I didn't think of it at the time.

         Best regards,

         Bob

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