I have set up a 6V, 2A regulator using an LT1764A, in TO-220 (5) package.
Feedback resistors are 36k, 9k1 to get 6V output. Input voltage is about 7V.
My problem is this: during startup, the output reaches 6V and then, for about 2 seconds, slowly ramps up to about 10V (!), then starts to go down slowly to 6V (rapidly if you suddenly draw substantial current).
The ADJ pin follows this: it seems like gain is correct (Vout = (1+36/9.1)*Vadj), and the reference pin is responsible for this.
I have used 2 ICs, in case one of them was defective. The behavior was the same.
Can anyone share an explanation as to why this is happening? I couldn't find a block diagram of the regulator either, to try to explain it.
added ADJ pin behavior
[edited by: Nickbaxev at 11:27 PM (GMT -5) on 19 Dec 2022]