I have tried to use several LT1763 (5.V, 3.3V and 2.5V) and could never get them to work properly. I am using a 10nF ceramic capacitor as Bypass, a 1uF electrolytic on the input side and a 10uF electrolytic on the output side.
Pin 2 is connected directly to pin 1, and all GND pins are connected to ground.
Instead of the regulated voltage I get a low voltage (between 1.2 and 2.4 V depending on the regulator used) that sometimes rises and falls slowly about 0.4V.
Extra care was taken not to exceed maximum soldering temperature.
I have now tried six different regulators and all exhibit the same behaviour.