10 µH power inductor for DC-DC filtering
The Murata LQH2MCN100M52L is a 10 µH drum core wirewound inductor in the LQH2 series, rated for 200 mA continuous current with a maximum DC resistance of 2.96 Ohm. The 0806 (2016 metric) surface-mount footprint and 0.95 mm seated height fit compact power-stage layouts where board space is tight. The 60 MHz self-resonant frequency means this inductor maintains its inductive impedance well above typical switching frequencies for DC-DC converters (hundreds of kHz to a few MHz), so parasitic capacitance does not bypass the intended filtering action in that band.
Current rating and DCR trade-off
At 200 mA the inductor's I²R loss is 0.118 W (200 mA² × 2.96 Ohm), which raises the internal temperature above the 85°C ambient limit. The ±20% tolerance on the 10 µH value is standard for power-grade ferrite-core inductors. In a buck or boost converter the closed-loop control compensates for the inductance variation; the saturation current, not the tolerance, is the limiting factor for the ripple current amplitude.
Unshielded construction and PCB placement
Because the LQH2MCN100M52L is unshielded, the magnetic field radiates from the drum core. Keep a clearance of at least one part width (2.0 mm) from sensitive analog traces, RF circuits, or other magnetics to avoid coupling noise into the signal path. For applications where crosstalk is a concern, a shielded variant in the same LQH2 family footprint is a drop-in alternative. The ferrite core material gives a stable inductance over frequency up to the self-resonant point, but the unshielded construction means the inductance value shifts slightly with the proximity of a ground plane or adjacent metal — account for this in the loop filter design if the inductor sits near a copper pour.