When devices wakeup, either by themselves (remote wakeup) or by seeing resume signaling, they must limit the inrush current on VBUS. The target maximum droop in the hub VBUS is 330 mV. The device must have sufficient on-board bypass capacitance or a controlled power-on sequence such that the current drawn from the hub does not exceed the maximum current capability of the port at any time while the device is waking up.