I have to control a very tiny small brushed motor that works with a 3.7v single cell lipo battery. The only thing that I have on hand to connect arduino to control this motor is a buk9507. I already used this FET to control things with 8v and even more, but I am not sure if it will work.
My other issue is that even if you say I can use 3.7v with this buk9507 chip, can I connect drain pin of this chip to 5v arduino pwm pin and control the 3.7v on the drain-source? I know this is a logic fet and it is supposed to work with 5v at the gate, but I never see someone use a higher voltage on the gate than in the drain-source.