3 Jun
2007
3 Jun
'07
1:13 p.m.
On such a small board, I'm not sure it's practical yet. The pcb real
estate + parts cost vs. the wattage might not be cost effective. The
LM2940 series regulator is a basic yet improved with minimum overhead.
When you need to convert down to something such as 3.3v, 2.5v or 1.8v,
an onboard switcher will help. If there's any switching power supply
being used, it would be sitting at the bottom of the backplane rather
than on each board. It's more cost effective this way. Then you can just
remove the onboard regulator and bypass it with a jumper wire.
=Dan
[ My Corner of Cyberspace http://ragooman.home.comcast.net/ ]
Al Kossow wrote:
If you are doing a design with on-board regulators in the 21st
century, why not use integrated switching rather than linear
regulators?
Heat dissipation will be MUCH lower if you do this.