One of my customers is evaluating TPS71530 on their own board for their new products.
In the evaluation, they found that about 0.6V overshoot was happend at powered up.
Their TPS71530 input is connected to 5V linear regulator output.
When the 5V regulator is powered up after long period of power off, the regulator output voltage starts rising from 0V and TPS71530 overshoot is not happened.
But, when the 5V regulator is powered up after short period of power off, the regulator output voltage starts rising from about 1.6V
because 5V output voltage is not discharged completely.
And the 0.6V overshoot of TPS71530 is happened then.
Also the TPS71530 input voltage rising time from 1.6V to 4V (passing point) is about 80us in that case.
The customer wants to know why the overshoot is happend and how to remove the overshoot.
Could you please give me your reply or comment?
Your reply would be much appreciated.