In the MP5515 datasheet, the PFI pin is defined as open-drain, but PGB and PGS are not. Interestingly, the Electrical Characteristics table treats PGB and PGS as if they are open-drain outputs. If these pins are standard CMOS outputs, the V_OH and V_OL levels should be specified, yet they are absent from the table. Could you clarify the output structure of the PGB and PGS pins?