Hi friends:
The bandgap reference based on two-stage amplifier always start up with overshoot about 0.2V,but the loop phase margin is enough,i dont know why?
thanks a lot!
Depends on the system if you want to apply a simulation with supplu ramp.
If you have a power down for your BGR then the supplu would appear as a step to the BGR.
When circuit start-up the opamp may not in the right region
so feedback loop is not active.
you can add some cap let the opamp work slowly.
like the attached picture.....