from the specification, we can find PGB delay 32ms when gate 10V-->0V, see in the below table.
and when i do the test of turning off the power, find the below figure,yellow is the pgood and blue is the drivew.when gate 10V-->0V, but PGb delay 30ms? why ? can we decrease the time, for we want to use it to do the design of the input signal.