I have a one of these:
- full charge voltage : 4.2V
- cut off discharge voltage : 2.75V
- capacity : 4000mAh
- size : 18650
And I want to get 3.3V from it.
but the problem is I can't use regulators (such as AMS1117) because the drop out voltage of it is 1.1V and I should have a 3.3V + 1.1V = 4.4V at the input. And its impossible for my battery.
What should I do to have 3.3V until the battery discharges to 3.3V ?