9V regulator question...

[Levispeights]

Hey guys,
I am working on a 9V/300ma regulated and filtered pedal board power supply. I don't know much about regulators however.
Would this one be a good choice from going from around 12v down to 9v? I need at least 300ma...

Fairchild KA7809AETU

http://www.mouser.com/ds/2/149/KA7809AE-185828.pdf

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/KA7809AETU/?qs=sGAEpiMZZMug9GoBKXZ75zv%2f6maRzyyT0dRqNlcOVoA%3d

Thanks in advanced!
Levi

[Govmnt_Lacky]

Looks like it can handle up to 1A of output current so... in that aspect you should be good. If you are looking for a 300mA maximum then this would be too big.

Just make sure that whatever you are using to drive it (provide 12V) can handle it.

[brett]

Hi
remember the heat loss too. 3V x 300mA = 900mW. All lost as heat. Maybe a small heatsink is needed?
Rough rule of thumb: if you can't leave your finger on it while it's drawing maximum current, the external case is 70C or more, and the internals are at risk of melting.
cheers

[Levispeights]

Awesome! Thanks guys!!