Hi,
thinking, if the simple LT3591, with Uin from 3V-4,2V (single LiIon battery) can drive single power led, with If = 300mA?
The Rsense should be 0,6 Ohm. Ot it is limited to 100mA?
And what happened when the Uin will fall down below 3V?
best regards
M.M.