What the 2.2 µH and 1.4 A rating mean on the bench
The LPS5015-222MRC: The 1.4 A continuous current rating is the DC current the part can carry before self-heating pushes the temperature rise beyond the design limit — and the 2.4 A saturation current (Isat) is where the inductance starts to roll off. If your rail sees transient spikes above 1.4 A but below 2.4 A, the inductor still holds its value, but the margin narrows as the core saturates.
DC resistance and the efficiency trade-off
With a maximum DCR of 90 mOhm, this part sits in the middle of the loss curve for its size class. At 1.4 A, the I²R loss is about 176 mW — not a deal-breaker for a POL converter, but if your board runs at elevated ambient, that 90 mOhm max includes the temperature coefficient of the copper winding. The ferrite core material keeps core losses low up to the 116 MHz self-resonant frequency, so the SRF won't limit you in a 1–2 MHz switching regulator.