SLLSFC6B November 2021 – July 2022 ISOUSB111
The ISOUSB111 can be powered by connecting a 4.25 V to 5.5 V supply on VBUSx pins, in which case an internal LDO generates V3P3Vx voltage. This option is suitable for the side facing the USB connector, where a 5-V VBUS supply is available. Alternatively, VBUSx and V3P3Vx pins can be shorted together and an external 3.3-V power supply can be connected to both. This second option is suitable for the side facing the microcontroller, where a 5-V supply may not be available.