I'm wondering if the LM317T (TO-220) can work at +85C (temperature) with a heatsink? and which heatsink can handle such temperature? or perhaps even using a heatsink I need to attach more than one LM317T in parallel to have a current of 1.0A at the output. My most critical case is when the Vin=13.7V and the Vout=1.3V and the Iout=1.5A (or 1.0A)