Identifying a Buck regulator IC

[Chungalin]

I have a shorted buck regulator IC but I can't find it's name.

Package: SOT-23-5
Marking: S15A3, possibly the interesting part is S15. For SURE "1" is not a "I".

Coil (SW) is connected to pin 3.
Input voltage (5V) goes to pin 4.
Ground goes to pin 2.
Feedback (FB) I guess is pin 5, because there're two adjusting resistors there.

Texas Instruments TLV62565 / TLV62566 is very close, but marking doesn't match (SIK, SIL).

My Tututa SMD book points to a Ricoh linear regulator, which is NOT the case.

This is inside a SAT receiver from year 2015.

Any idea?

[Chungalin]

Re: Identifying a Buck regulator IC

Looking at other similar components in the same board, I find that there're some from AMS. There're two AMS (Advanced Monolithic Systems):
http://www.advanced-monolithic.com/
http://www.ams-semitech.com/

The second has some DC-DC ICs that could be what I'm looking for:
AMS15905, AMS15906, AMS15907...
No datasheets available to confirm marking.

[Chungalin]

Re: Identifying a Buck regulator IC

I think I've found the solution at BadCaps russian counterpart: http://monitor.espec.ws/

Yuritsh has compiled this awesome thread with a summary of SOT23-5 / SOT25 DC-DC ICs, with marking references:
http://monitor.espec.ws/section27/topic200427.html

Then, the marking part to look for is S1, not S15, and this tells me it's a Chipown APS2415.

I was trying to identify another DC-DC IC of the same kind, marked with AD2RC. Now I know it's a Silergy SY8009A. And the best thing is that they have high chances of being compatible!