please note that the current and power ratings of power mosfets specially smd ones is depending on mounting conditions. using power pad , via holes near the device and large copper planes reduce thermal resistance. without this precautions junction temperature will rise and this will increase rds(on) up to 2 times. as u can see in infineon or vishay siliconix web sites, there are several high performance solutions for your project.
BTW in comparison with current technologies, 36 mohm device is not state of the art.
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