The LQH2HPZ220MDRL: The ferrite core and shielded construction contain the magnetic field, reducing crosstalk to adjacent traces or nearby sensitive analog circuits — important in a mixed-signal environment where a buck converter's inductor couples into a sensor front-end.
Current and DCR — what they mean for your rail
Rated at 270 mA continuous with a saturation current of 260 mA. The saturation point is just below the rated current, so the inductor is sized for a rail that stays under 260 mA peak — above that the inductance rolls off and the ripple current climbs. The 3.6 Ω max DCR means about 97 mV drop at full rated current; that I²R loss (roughly 26 mW) is manageable in most automotive-grade designs but needs a quick thermal check if the ambient is near the 105 °C ceiling. Inductance is tested at 1 MHz, and the self-resonant frequency is 20 MHz. The inductor behaves as an inductor well below 20 MHz; above that the parasitic capacitance dominates and the impedance turns capacitive. For a switching regulator switching at 2–4 MHz, the 20 MHz SRF provides enough headroom.
Automotive-grade qualification
AEC-Q200 qualified, meaning it has passed the stress tests (thermal shock, vibration, humidity, solder heat resistance) required for automotive passive components.