SMD marking identification

[dagav]

Hi,
need help to indentify SMD component marked with 2290.
Regards
D.A.

[inse]

I have no idea.

[gamalot]

Looks like MAAM-009100:

https://cdn.macom.com/datasheets/MAAM-009100.pdf

[fzabkar]

Looks like MAAM-009100:

https://cdn.macom.com/datasheets/MAAM-009100.pdf

Amazing. How did you find it?

[gamalot]

Looks like MAAM-009100:

https://cdn.macom.com/datasheets/MAAM-009100.pdf

Amazing. How did you find it?

I searched for RF devices in SOT-89 package at LCSC and I found some MACOM RF amplifiers that are very similar to the chip in the OP's picture. So I went to MACOM's website to try to find it. Unfortunately, although I found the MAAM-009100 that matches the peripheral circuit, there is no information about top marking in their datasheet, and I can't find any picture of it. That's why I can't say with confidence that it's MAAM-009100.

[dagav]

Hi, I think it is the MAAM-009100, despite the missing markinginfo on the datasheet.   So thanks alot "gamalot".  It is 6 of them in a adjustable RF amplifier, originaly made by MACAB, a swedish company, but sold by a norwegian company as ELKO.  It is very special solution(imo), used to amplify RF signal onto ethernetnetwork, using one of the pair, and a "balun" at each outlet, for connection to the TV.  Since the PSU to this unit was dead, I suspected more damage on the amplifier, because a lot of noise on the outputs, when a new psu was connected. That can possibly be a matter of adjusting, we shall see.  Since these units are not sold anymore, it has some value for the user to get it up and go again.  Once again thanks for your help.
Regards
D.A.