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Subject: Re: Lowest voltage drop diode
Date: Wed, 25 Sep 2002 03:35:02 +0100
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"oguz" wrote in message
> I am looking for a very low voltage drop diode ( or equivalent circuit
> ) that has a forward voltage drop of 0.2 Volts or less. Maximum
> current to be conducted will be less than 5mA.
> Currently, I am using a BAT85 Schottky diode from Philips. This has a
> forward voltage drop of 0.3-0.4 Volts maximum. I have looked at some
> Germanium diodes that have a drop of 0.3 Volts.
> Is there a way to do this with a MOSFET or Transistor ?
> Is a one-way conducting device of 0.2 Volt drop or less achievable by
> any means ?
Is this for reverse voltage protection? If so you can use a P-channel
enhancement mode MOSFET wired 'backwards', i.e. gate to 0V, drain to +ve
supply and source to load.
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