Voltage Regulators

Kurt_ · Post by **Kurt_** » Tue Dec 27, 2005 11:29 am

Is there something wrong with using one 7805 instead of two in my portable? Like this:

Also, is there a better Regulator that I can use? One that drops out around 5-6V instead of 7.5?

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Dec 27, 2005 12:00 pm

an LDO regulator would do what you want (low drop out)
but it depends if you want to use one regulator, if you do you will need one that can output enough amps, id say 1.5 would definitly be safe

Kurt_ · Post by **Kurt_** » Tue Dec 27, 2005 12:32 pm

I thought that the only difference was that more current would go through it. I was right, aparently.

Thanks for the help, but could anyone name specific regulators?
(Like ones I can get free from TI

)

someone · Post by **someone** » Tue Dec 27, 2005 2:25 pm

You can buy a 7805 at any electronics store (not LDO though) for (I don't know the exchange) less than 2 USD. If you want an LDO you either need a good electronics store, or to order from an online company.

Kurt_ · Post by **Kurt_** » Tue Dec 27, 2005 9:20 pm

Well seeing as it's free (and seeing as this computer has deepfreeze and I don't want to lose the product page

) I decided to order 3 of each of these:

http://focus.ti.com/docs/prod/folders/p ... 281-5.html

http://focus.ti.com/docs/prod/folders/p ... 381-5.html

They seem the same to me.

Could anybody tell me if this is what I wanted? I think it is. Will 1 Amp be enough current for a SNES mini and a screen?

nos_slived · Post by **nos_slived** » Wed Dec 28, 2005 2:43 am

I don't know about the SNES mini, but the PSone screen draws about 750mA un-modded, and about 350mA with the LED mod, so you may need to use 2 convertors anyways.

BTW, the DC-DCs that you're brother found have a 5V sister model, so those may be better, especially since they can handle up to 2A.

Kurt_ · Post by **Kurt_** » Wed Dec 28, 2005 11:22 am

Yes. But do the DC/DC's have an input voltage lower than 7V?