For any N-Channel small MosFet needs (up to 2A) have a look at the Si2308 too. It is working fine from 4.5 Volts with Rds of 0.192 and Id of 2.1 Amp.


And the best P-Channel Power Mosfet I have find maybe is the SUM110P04-05-E3. Usually the P-channel have high Rds and low Id specs.

Ioannis