I decided to make an adjustable power supply with input voltages from 3 to 6 volts (4A), and output voltages from 2 to 12 volts. But I had a thought, that as long as I'm making it, I should make it go down not just to 2 volts, but as low as possible, as close to 0V as possible.
I would also like to controll current. Currently it is controlled by the fixed Rsn resistor.
I decided to use LM3488 in SEPIC configuration.
(1) How to make the output go down to 0V?
(2) How to controll current with a pot or something similar?