John Pearson wrote...

>I am trying to find out what the minimum input
>voltage to my voltage regulator needs to be.
>
>My data sheet has a 'Dropout' voltage of .10
>typ., .15 max volts.
>
>Does this mean that the input voltage must be
>.15 volts higher than the output voltage, or
>is there something else I need to figure in?

You have it right: the "droopout voltage" spec gives you the
minimum required input-output differential needed for the
regulator to operate.

Dave D.

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