Gate drive and threshold — what to expect
The CSD25484F4 specifies a maximum threshold voltage of 1.2 V at 250 µA drain current, and the drive voltage range runs from 1.8 V up to 8 V for achieving minimum on-resistance. That 1.8 V minimum drive means this part can be turned on by a 1.8 V logic rail, but the 94 mOhm Rds(on) figure is quoted at 8 V — expect higher resistance at lower gate drives. Gate charge is 1.42 nC at 4.5 V, so switching losses stay low in moderate-frequency applications like load switching or battery disconnect.