TPS62420 Settling Time

Require 1.85V for CC3200 in pre-regulated mode.  Line and load regulation with less than 2% ripple, 500 mA step current and settling time of < 4 μs with the load step.  Therefore changed from TPS62421 to TPS62420 which allows one to provide the extra 0.05V.  TPS62420 fulfills the ripple requirement if forced into PWM mode, 500 mA step current looks OK but only by looking at graphs.

As there is no mention of settling time in datasheet could someone please tell me if TPS62420 fulfills the settling time of < 4 μs with the load step?

Thanks