I'm doing a new hardware design with the K66, and it is to use high speed USB1 peripheral in device mode only. There is no requirement for bus or battery power. My question concerns the USB regulator. My preference would be to not use the USB reg at all and instead power the USB peripherals from the board's efficient 3.3V supply. Furthermore, from a layout standpoint it would be nice to not have to provide the 2.2uF cap on VREG_OUT.
If this regulator is not needed, but USB is required, would it be acceptable to simply tie all of VREG_IN0, VREG_IN1, and VREG_OUT to VDD ?