Maybe he should try the FDN377N.

	Mark Jordan


On 25 Jul 2008 at 15:15, Jinx wrote:

> > 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 ?
> 
> -- 
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist