This device has no specific power sequence unless used as a USB device
USB supplies require power sequencing for reliable USB enumeration. If the USB subsystem is used, USB_VDDA1P3 and USB_VDD1P3 must be powered up first, and then the USB_VDDA3P3 and then the USB_VBUS. USB subsystem power up sequence:
USB_VDDA1P3 and USB_VDD1P3
USB_VDDA3P3
USB_VBUS
VBUS must not be supplied by host while C55xx is powered-off. The VBUS IO is not fail-safe. Following the above power sequencing ensures that VBUS will not reach the C55xx device when power is not applied.
Load switch parts that can be used for usb power sequencing: TPS22915, TPS22913