Help to identify smd chip V5s 55

[gillyflower]

Hi guys,
First time poster so please be gentle.

I think this device may be a voltage reg but I cant find anything matching online.
Cant be too exotic I wouldnt think. It looks like a sot 457 but with 5 pins the lower rightmost being double width.

It is in a professional LED light by THELIGHT called a VELVET 1. No info from the manufacturer of course 

Any help would be much appreciated.
Thanks guys 

[ElektronikLabor]

A picture of the PCB could help.

Quick google search: http://www.smdcode.com/en/smd/code/v5-rt9167-2hpb-linear-voltage-regulator-integrated-circuit-23121/

[gillyflower]

Hi Medvedev,

Many thanks for the super quick reply
Yes that reg looks plausible. Interestingly Google didnt offer me that site in my search results.

I've attached a pic.
I have the light working now (and I dont know how, and that bothers me) While I was testing voltages I accidentally shorted a resistor not shown here to an unpopulated pad and the light just started working. Not something I usually try to do of course but shit happens. Since then I have run the light for a couple of hours and also left it disconnected overnight. Still works fine?? Never seen that before. Stray charge on something that the designer left floating?

Thanks again for taking the time here Very much appreciated.
Gillian.