The datasheet specifies a startup time of 200us unless the Enable signal ramps with Vin. Just at specified in the datasheet we have a delay of 2ms (10ms MAX) when Enable ramps with Vin, however the delay is about 2.7ms after Enable goes high when Vin has reached 3.6V. Do you have any idea what might be causing this behavior?
Below is the waveforms where in you can see that the device only starts to switch beyond 2.5ms