These are peak-current mode controlled buck converters, so the inductance is always 2.2µH. More importantly, you have to select the inductor based on its saturation current. We always recommend metal alloy core inductors (NOT ferrite). The reason is that ferrite cores have extremely bad AC losses in the core and we have seen up to 20% efficiency reduction with the use of small ferrite cores vs. small metal alloy cores. That being said, there are very limited options for 2.2µH inductors in cases smaller than 0805. Any inductor selected should have a saturation current >500mA.