Voltage limiter 9V and above

[crutschow]

I played with sim, values, etc., seems totally stable.

Glad that's settled.

 

[tatsiistasdev]

That's the voltage you get with no load, due to the current through R4 from the Ref voltage, although it should be less than 2.5V.

Thank you so much! Really appreciate your help! With load, it works perfectly!

 

[tatsiistasdev]

@crutschow, I played with sim, values, etc., seems totally stable.

Guys, you are awesome, appreciate the help. I was really disappointed that it is working sometimes and sometimes doesn't.

 

[crutschow]

With load, it works perfectly!

Something to remember, is that floating nodes in electronic circuits can cause odd or flaky results.