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Looking for a MOSFET to make a heater.

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noether

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Hello, I'm designing a simple heater circuit and I need a little help choosing the MOSFET.

The design is easy, is a 5V regulated with a 5 ohms resitor to disipate ~5W.

http://gb.mouser.com/ProductDetail/Arcol/HS15-5R0-1/?qs=oJqWk0A1%2bW23dacsNpP7zA==

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.

Thanks in advance.

EDIT:

What about this one?

http://gb.mouser.com/ProductDetail/...=sGAEpiMZZMtvcUztdGSumMz0ryUUAaQmn7yelxM8qQM=

Also, I found a linear regulator with switch function

http://gb.mouser.com/ProductDetail/...=sGAEpiMZZMuLLNXTG1MZaqnSRlD4OsqYmvkLaqtvQs4=

This heater will have a dedicated battery, in order to evaluate the disturbance switching on/off.
 

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.
 

    N

    noether

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Maybe I'm wrong, but I guess you missed one number in MC3385?

I'm checking out the freescale website and they have 5 numbers instead 4 xD, and I don't find anything with this number in google as well.

I guess this is the chip, MC33385: http://www.freescale.com/webapp/sps...eId=M98460&nodeId=01435979968460&fromPage=tax

Thank you so much for your help.

Added after 1 hours 18 minutes:

Finally, I decided to try this Linear Regulator, thus I won't need a fet.

http://gb.mouser.com/ProductDetail/...=sGAEpiMZZMug9GoBKXZ755TE7rzQffPQc6HFWREkK4o=

It can be disabled with 3.3V logic level and can drives until 1A, dissipating 15W maximum.
 

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