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Thread: FET question
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> The 450 mA at 0.15 ohm

This d/s says 0.2R @ 4.5V, 0.3R @ 2.5V

http://www.fairchildsemi.com/ds/FD/FDV305N.pdf

Take a look at Figures 2 and 4, you might find that Ron is higher than
you planned for

If I'm asssuming correctly, quick look, and the normalised Ron is *1.1
@ 3.5V and 0.5A, then that would mean actual Ron in circuit is 0.33R,
so you'd be losing 0.450A * 0.33R = 0.15V. If so, that puts the voltage
available for the Rabbit at 3.15V

Can you bump up the regulator output a little ?

<047601c8ee04$dde1ecf0$89aafea9@ivp1> 7bit

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