Can i use this chip for a 5v mod?

[justbrewit]

Linear Regulators - Standard Voltage Regulators - UA7905 - TI.com

its a negative 5v regulator that i found and was wondering if it will work

any thoughts?

 

[lefear]

You could use it. 5V is 5V.

But I see that the Iout Max is 1.5A. That won't be enough current unless you use attys with more than 3.3 ohm resistance. You need at least 2A output with anything less than 3 ohms and more than 2.5 ohms. A 3A output would be even better that's what I use with my 2.2 ohm 510 attys they pull somewhere between 2.3A to 2.5A of current.

 

[justbrewit]

it will be used in a dual 18650 mod with a regular addy, which i believe are above 3ohms. i'll have to test it.

i also have nichrome wire to make my own attys and be able to use any resistance i want as long as my device can push it.

 

[lefear]

If you are willing to make your own atty, why not make one that can work with your battery configuration without using a regulator?
Using Ohm's Law V=IR and P=VI you can find out how many ohm your atty has to be.

For an example if you don't want to have more than 10W of power start at a full battery charge of 8.4v.
P/V=I
10W / 8.4v = 1.2A

V/I=R
8.4v / 1.2A = 7ohms

After the battery drops to normal mode it would be down to 8.6W.
VI=P
7.2 * 1.2 = 8.6W

Granted 7 Ohms is pretty high, I don't know if that would even fit in an atty; but if I had the wire I would just have to try it so that I don't have to mess with regulators.