Inductance, current ratings, and the DC resistance trade-off
The LPS6235-105MRC: At 1 mH ±20% with a 240 mA continuous current rating and 140 mA saturation current, this inductor sits in the high-inductance, moderate-current zone — typical for input/output filtering in DC-DC converters where ripple attenuation matters more than peak load delivery. The 3.4 Ohm max DCR means the I²R loss at full rated current is about 196 mW — a manageable thermal budget for the 2424 package, but the DCR dominates the efficiency curve below 50% load, so this part is better suited to steady-state filtering than high-efficiency point-of-load converters. The 2.2 MHz self-resonant frequency sets the upper bound for useful filtering — switching frequencies above roughly 700 kHz risk coupling into the self-resonance band, so pair this inductor with converters switching at 500 kHz or below.
Shielded construction and board-fit dimensions
Shielded ferrite core construction contains the magnetic flux within the package, reducing radiated EMI into adjacent traces and components — a practical advantage when the inductor sits near sensitive analog or RF circuitry on the same board.