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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

wpa wrote:

| use LM317 with 2 resistors calculated for 9V.
|
| "Lawrence Lucier" schreef in bericht
| ...
|
|Howdy all..... :-)
|
|Has anyone a suggestion for a 3 terminal voltage regulator that
|will take 12vdc input and output 9vdc @ 1A?
|
|Any suggestions would be much appreciated...thanks! :-)
|
|
|

- --

Regards,

Sean Coyle
President
Greenroom Networx
Ph: 604.941.7832
Fx: 604.941.7803

"Working to create teleports for economic and business development,
Intelligent City, information and communications technology"
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