3 Aug
2015
3 Aug
'15
6:18 a.m.
From: ard at p850ug1.demon.co.uk
Was the failed IC marked '723' or some house number?
-tony Hi Tony As I recall, it was marked LAS723-2.5Luckily, before I simply replaced it,
I checked the feedbackresistor values. They didn't make sense for 7V.My guess is that
it made using the 723 for 5V supplies morepractical, although it could be wired up.The
data sheet seems to indicate a better tolerance.The 2.5V references are usually bandgap
and are tightertolerance. As I recall, in the supply I was working on, it was a low
current 12V line.Dwight