Hi team,
My customer meet some issue on power off, SCH is below:
And below is the power off wave of TPS56221:
Input voltage is 12V, output is 3.3V, load current is 6A, when input power drop to 6.3V, TPS56221 input voltage has a big drop.
But when customer use 6V supply TPS56221, set output to 3.3V@6A load, TPS56221 works good.
We don`t know why this strange drop happened when input drop to 6.3V, do you have some comments?
Thanks very much.
Regards, Sunny