@chrisknightley , thanks for info. I need to power the TFT with 5V, could you recommend me a logic level MOSFET for this purpose?
Other times that I tried to switch on a load (5v fan and 200mA) with a mosfet and 5V aplied both to gate and load side, the output voltaje drops to 3.6V with load connected, if load were not connected the output voltage was ok, 5V. I used this module:
With same configuration and 12V for load (for a 12V fan and 500mA) and 5V in the gate, no problem.