The LM1085-12 has a dropout voltage of 1.3v typ; 1.5v max.?? The lm1117ADJ likewise has a low dropout voltage but would require a couple more parts since that part doesn¡¯t come in a fixed 12v version.
Mike
K5ESS
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From: [email protected] [mailto:[email protected]] On Behalf Of Bo BarrySent: Saturday, June 2, 2018 12:16 PMTo: [email protected]Subject: Re: [BITX20] Power supply question
If I recall correctly the 3 terminal regulators definitely need a minimum of 3 volts difference between input and output.Bo W4GHV?