Need help identifying components in SeekThermal

[frenky]

I plan to draw a complete schematic of SeekThermal but I can't identify this two components:

Markings: CI
Dimension: 1mm x 1mm
Element:

Pcb pads:




Markings: KG 05 (or OS) 4M
Dimension: 2.54mm x 1.24mm
Element:

Pcb pads:


And location of both components:


Please help. 

[frenky]

I identified the "CI" element by measuring voltage. 5V goes in and 2.8V goes out so it's voltage regulator...

This one is still a mistery:

Markings: KG 05 (or OS) 4M
Dimension: 2.54mm x 1.24mm
Element:

Pcb pads:

[frenky]

Ok mistery solved... All 4 pins on the left go to USB connector.