I need a MOSFET to switch on/off the heater from a 3.3V level microcontroller, and I'm really lost choosing one (whatever the mouser/digikey searches are not so useful).
Any help? I accept suggestion in the heater design as well.
The heater is to avoid go -0ºC or less , so I don't need really to be accurate in the temperature control.
With the weak available drive, and not such a big load, you
might prefer an integrated low side switch with a CMOS/TTL
compatible input.
Freescale has some up to 2A per channel but looks like they
are end-of-life-ing the MC3385. Still this may be an easier
thing to get right, quick, than a power MOSFET and driver.