I'm trying to modify a LED torch, and there is a DC-DC booster (1.5 V to 3.3 V) and after that some SOT-23 device which (I assume) keeps constant 90 mA current through LED. I know I could remove that device and replace it with a resistor, but that has disadvantage that current won't be as stable with temperature drift of LED.
So I would like to replace that current limiting device for another one.
I was looking for devices like "[SOT-23 LED constant current driver](https://www.google.com/search?client=firefox-b-d&q=SOT-23+LED+constant+current+driver)", "[SOT-23 constant current regulator](https://www.google.com/search?client=firefox-b-d&q=SOT-23+constant+current+regulator)", "[SOT-23 constant current sink](https://www.google.com/search?client=firefox-b-d&q=SOT-23+constant+current+sink)", etc. but with no luck finding similar device whatsoever. I couldn't find anything similar on Mouser or Digikey (I could be looking in wrong categories though)
My question is:
Is that common device and what is it's name?
This is the schematic:
