Hi Guys
I'm trying to get 12volt 1.5amps from my cars dirty 10~15 volt supply.
After a little Googling I'm guessing I'm going to be using the lm1085t.
I found two schematics on the data sheet but i'm wondering which one would be the best to use.
The first is this:
Obviously it has 4.75V in and 3.3V out, so what would I need to change to this to get 12V out?
**broken link removed**
Secondly, there's this:
**broken link removed**
I'm pretty certain that this is the one I need, but, I'm a little screwed on the math >> Vout = 1.25(1+ R2/R1) ??
.. and what type of Cap is C1?
Could anybody help me out here?
Thanks
Fritz
I'm trying to get 12volt 1.5amps from my cars dirty 10~15 volt supply.
After a little Googling I'm guessing I'm going to be using the lm1085t.
I found two schematics on the data sheet but i'm wondering which one would be the best to use.
The first is this:
Obviously it has 4.75V in and 3.3V out, so what would I need to change to this to get 12V out?
**broken link removed**
Secondly, there's this:
**broken link removed**
I'm pretty certain that this is the one I need, but, I'm a little screwed on the math >> Vout = 1.25(1+ R2/R1) ??
.. and what type of Cap is C1?
Could anybody help me out here?
Thanks
Fritz