I'm using this Regulator namely TLV1117-50IDCYR for a project that I'm working on. Aparently everything is working fine with this chip but sometimes I feel it's heating too much and I'm not putting all the load there.
I'm making a regulation from 12V to 5V for a 300mA output current and it will have a 2,1W of power dissipation.
I've checked the datasheet on the page 5 and it says the Junction-to-ambient thermal resistance is 104.3 ºC/w and the Junction-to-case (top) thermal resistance is 53.7 ºC/W.
My doubt is: which parameter should I consider for my case? If it is the second one I am not seeing any problem.
Can you help me on this? Many thank's!