Shot in the dark.. figured I would try...

[Govmnt_Lacky]

I have a small SMD chip here that looks like a regulator. It looks like this:

http://www.sparkfun.com/products/595

The markings on the chip are as follows:

CEC
P7o

That is it. When I measure it in-circuit, I get 3.4VDC on the center leg AND tab. I get 10.9V on the RIGHT leg and 11V on the left leg.

I would say this is a 3.3V regulator but WHERE IS THE V- or GROUND? Can you put another voltage onto the "ADJ/GND" pin?

If anyone has an idea... PLEASE.. PLEASE let me know 

[David]

Patrick:  You had the answer all along.  It's the SMD equivalent of a LM317 adjustable regulator.
Google that for a datasheet or for some usage examples and you'll find everything you need to know.
I used one on a daughterboard I built with my Tiny Giant to take voltage from the amplifier down
to 9V in order to run my pedals.  Works great!

[Govmnt_Lacky]

If it is an SMD regulator that is like an LM317, then why is the output voltage 3.3V?

Also, if this is not a LM317-alike and it is in fact just a SMD 3.3V regulator, then why am I reading voltage on BOTH SIDES? (the input & the gnd/adj pins)

I think I may need a bit deeper explanation  

[PRR]

> When I measure it in-circuit

What circuit?

[Govmnt_Lacky]

I figured it out.

It is a PNP smd power transistor.