Hi Team,
My customer is using LM2903B and finds below issue.
From my understanding, the output transistor won't be conducting at Vcc=0V, so the output would be whatever voltage the pull-up resistor is tied to, i.e., 3.3V. So, why there has a dropout when VCC goes to 0? And when VCC becomes 0, the output is normal 3.3V.
I tried to simulate this in Tina, the sim results is similar that output has a dropout when VCC goes to 0. But there has a difference that in simulation, the output doesn't go back to 3.3V (it keeps 0V) even VCC is stable 0V. I don't know why.
Could you help explain how this issue happen? and why there has different results in Tina? thanks a lot.
Best regards,
Yang