I have a legacy design in which 3.3V and 1.8V are produced using the ADP2140ACPZ3318.
There are no available parts on available at any distributor.
I was thinking to use the 2.5/1.8 or the 1.2/1.8V versions which are available,
and force the switching supply to produce 3.3V by inserting a resistor in the feedback path
(between FB pin and inductor as in Fig.1 of the datasheet).
Could you recommend me the value of the resistor to use
Alternatively, I would appreciate to if someone could reply with the input impedance or the bias current on the FB pin.