I'd like to know for each REGOUT (referred to COM) value (1.8V, 2.5V, 3.0V, 3.3V, 5.0V, 9.0V and 12.0V), while REGOUT is sourcing 3.0mA for instance, what are the minimum loop voltages (REGIN to LOOP-, 24mA loop current) required for proper operation.
I know the difference between COM and LOOP- will vary up to almost 1.5V (loop current * 52Ω) in normal operation. In other words: Whats is the Voltage Regulator dropout voltage?
Also, if I use the depletion N MOSFET, will AD5421 still work at lower loop voltages (e.g. 9V)?