Closest match on Mouser appears to be XR46010ISBTR with NPN. SOT-23 pinout standardization leaves a lot to be desired though, so I'd be very careful double-checking the pins of your layout symbol vs datasheet. Don't trust the schematic pin numbers.

I have seen NCR402 during my searching. That is current source, not sink. And it has much larger dropout voltage. In my case source is 3.3V, LED is at 3.1V, so there is just 0.2V difference.

@Chupacabras‭ As noted, this was a PNP part but you need N-channel. Just search for SOT23 LED Driver and you get plenty of results. If you wish the exact part, then you have to put more effort into the question, adding the print on the IC and preferably also a photo.

@Chupacabras Did you try the above mentioned XR46010ISBTR? Looks fairly compatible, though I'd double check the pinout because SOT-23 pin numbers aren't that well standardized.

Thanks for XR46010ISBTR. It's not usable in this case, but I could use it somewhere else.

@Chupacabras Aim for one with 20mA, that's more industry standard. Also for 1st source I'd probably pick a silicon vendor with more self-respect than someone who calls themselves "MaxLinear" - there's nothing wrong with their parts, it's Sipex/Exar/whatever, they change name every year. But I laugh whenever I hear the name. Maxim and Linear being two of the most well-known high quality high price vendors, but this one is a low cost brand. As if they seek to scam you into buying their parts...