Power rail filter or DC-DC output inductor for automotive and industrial designs
The Coilcraft LPS6235-223MRC is a 22 µH shielded drum-core inductor rated for 1.1 A continuous current with a saturation floor of 1.6 A, giving headroom for transient loads without hard saturation. The shielded ferrite core contains the magnetic field, which reduces radiated EMI coupling into nearby signal traces or the enclosure — a practical advantage when the inductor shares a board with a CAN transceiver or a sensitive ADC reference.
Parametric fit: current, DCR, and saturation margin
At 1.1 A the 145 mOhm max DCR produces a conduction loss of about 175 mW — well within the thermal budget of the 2424 (6060 Metric) package when mounted on a standard two-layer board with adequate copper pour. The 1.6 A saturation current (Isat) is the point where inductance drops by typically 30%; the 1.1 A rating leaves a 45% margin, so a 1.5 A peak transient in a buck converter will not cause the inductor to saturate and lose filtering action. Self-resonant frequency is 24 MHz, which is well above the switching frequency of most automotive-grade DC-DC converters (typically 400 kHz to 2.2 MHz), so the inductor behaves as a pure inductive element in the passband.
The 100 kHz test frequency for inductance is the standard for power inductors; the 22 µH value is guaranteed at that frequency with ±20% tolerance, which is typical for ferrite-core power inductors used in switching regulators.