Tarzan: A response from the designer:
It is a little bit complex topic. Small output current doesn’t meant to choose small inductance. Small inductance tends to make converter work in DCM mode at low load current; this will make the transient response bad; if they don’t care load transient response they can try some inductances with small values. Attached is one document regarding magnetizing inductance and filter inductance for your information; both of them will affect the work mode (CCM or DCM), that is the transient response. The switching frequency affects the work mode, also while choosing transformer we need pay attention to its saturation characteristic.
Typically the filter inductance decides the work mode and the bypass capacitance decides the ripple (△V= I*DT/C). Also the L and C relates to the loop compensation design, if they change the values, they can change the small signal response of the converter; but this is tricky, they can change the L and C, however try to maintain the stability of converter.
Regards, Brian