[sdiy] Best way to get a +3.3V rail from +15V?
neil.johnson97 at ntlworld.com
Thu Mar 7 17:21:06 CET 2013
> A similar board I did on stripboard (the new one is getting a PCB) draws 101mA on the 3.3V rail. This board will have a 74HC594 driving some LEDs too, so I need perhaps 200mA. Does that change the picture any?
A linear regulator would dissipate about 2.4W providing that amount of
current, from +15V down to +3V3. That's quite a lot, and unless you
use a large heatsink then you've got yourself a nice little finger
Look in Farnell or Rapid. For example:
Modules and more: http://www.cesyg.com
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