I'm about to put a LD1117 Low drop-out regulator in SOT-223 package into one of my projects and wonder if the heat sink is internally connected to anything.
Unfortunately the data-sheet doesn't mention the heat sink lug at all but states that the device is "pin to pin compatible with the other standard voltage regulators".
I'd like to solder the heat sink lug to ground for best thermal contact, but since it isn't stated in the datasheet I'm hesitating a bit.
So what to do? Connect the heat sink lug to ground or better not?