Please consult the ADM3053 VCC can use 3.3V power supply. Because the 5V power supply is used for analog circuits.
The ADM3053 has two separate supply pins, VCC and VIO. The VIO pin supplies the signal isolation. The VIO pin can be powered with either 3.3V or 5.0V. The signal logic levels will scale with the supply voltage. The VCC pin is the supply for the integrated isolated power. The VCC pin requires 5.0V.
If you have only 3.3V power available in the system, the LTM2889-3 may be a consideration. It is also an isolated CAN + power device, but it can supply the isolated power from a 3.3V supply.
Linear Technology - Product Page
Retrieving data ...