I've got a product with a PIC32 in it that I'm currently driving with a
250mA 5V USB style power supply. I'm using a simple linear regulator to
drop it to 3.3V for the digital, while keeping the 5V for the analog.

Customers don't want to run two wires (Ethernet and USB Power). So,
there's always Power Over Ethernet. But, it looks complicated and
expensive, especially for the 2 watts or so we need (a lot more than we're
currently spending for the USB power supply, cable, connectors, and linear
regulator).

But, it seems like this should be a common problem with a low cost modular
solution. Linear and TI and others are making switching DC to DC converter
modules, some of which are pretty inexpensive. It SEEMS like there should
be such a module for POE. It'd have the two diode bridges, load switch, DC
to DC converter, and a DC output. But, I can't find anything like that
(well, I did find one for $35). Most of the POE stuff is emphasizing high
power (and cost).

Does anyone know of a low cost POE PD module?

THANKS!

Harold



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