> A linear pass regulator is very likely a better solution. 
> They are cheap and their performance will be in a 
> different league.

Probably. But there are several shunt regulator diodes 
around that are ultra cheap because they are used in 
zillions. The LM385 is cheapish and the lower spec TL431 is 
about the cheapest IC you can buy, ($US0.40/1 down to under 
$US0.08/large_volume).

FWIW the lovely CD40106 is just dearer at high volume and at 
under $US0.015 a Schmitt inverter may be the best value IC 
ever known.  Not so good as a voltage regulator though :-)



        Russell

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