Most DC:DC converters will tolerate a slightly higher voltage being applied to the output. I have inherited a design using several ADUM6000 parts providing 5V power to isolated circuitry that really needs at least 6V. It would be easy to wire in a 6V supply to the output to check if the circuitry works better, my question is whether the ADUM6000 would tolerate this, or be damaged.
The ADuM6000 will accomodate 6V at the output, which is above the 5.4V max regulated output, so the IsoPower output would be off and not be regulated internally. It is important for the output to not go above the 7V absolute maximum specification to avoid damage to the ADuM6000 output.