It's best to view the part in the context of its surroundings, but if I were to hazard a guess, I'd say that its manufacturer was ON Semiconductor, or maybe Richtek.
Can you show us a more complete picture of the board?
BTW, there is a possibility that Vin has punched through to Vout, in which case their may be additional damage downstream. Can you measure the resistance between the inductor and ground?