The MAX20734 has 4 output current settings; 0, 1, 2, 3 and 4. In EESIM you chose which setting you want to use in the 'Programmable Parameters' tab. These settings are detailed in the Electrical Characteristics…
The MAX20734 Typical Application Circuit shows the PMBus IO is "1.8V or 3.3V" compliant.
As there is only one threshold voltage internally in the MAX20734, the PMBus can be used at any voltage between…