I see all these posts wanting to go from 12v to 9vdv

I would just use 2 resistors to split the potential difference? What am I
missing why are "LM317" etc a better chocice?


"@ spam]grnetx.com" ""sean.coyle[no \"@ spam]grnetx.com" wrote in message
. ca...
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The LM317, not a very good choice;

Not Low Dropout, requires a three volt difference in i/o voltages,
however it does handle around 1.5A. Try this part #: KA278R09TU, it can
be ordered from Fairchild Semi or any one of their agents, and the good
news, is they offer free samples of it, so you can probably hook
yourself up with 5 - 10 for free . Dropout is rated at "below 0.5V"
and can handle around 2A -- This regulator has various functions such as
peak current protection, thermal shut down, overvoltage protection and
output disable function.

Datasheet: http://www.fairchildsemi.com/ds/KA/KA278R09.pdf
Product Page: http://www.fairchildsemi.com/pf/KA/KA278R09.html