Hi guys,

I am working on my first electronics design and am looking for some tips. I have about 12V coming in from a battery and most of my circuit uses 3.3Vdc. The regulator converts the voltage to a 3.3Vdc out with 1.5A max output and is designed according to the spec sheet.

I have attached an image of my basic design. Any suggestions or tips would be greatly appreciated.

 

what is the purpose of the coils?

 

Hi,

They are common mode chokes to reduce EMI

 

A 100uF on Vout is enough. You can flip the other 100uF to Vin though the datasheet wont specify them. Its acts good for heavy load regulation.

A simple choke is no better than a good cap. If chokes need to work good, they must be used in conjuction to capacitors, I dont remember how, read it sometims back on wiki abt rectifiers.