tmp36 soic, doesn't work, but the to92 version does, am I missing something obvious?
The SOIC and SOT-23 packages for this part offer a “shutdown” state in which it consumes almost no current. The /SHUTDOWN line controls this mode. For normal operation, /SHUTDOWN must be held high — tying it to the positive voltage supply should work.

The TO-92 version of the part doesn’t have this signal; it is always running as long as it’s powered. 

Many modern parts have features like this as power management for small portable devices has become a priority.