15 µH shielded wirewound for DC-DC rail filtering
The Murata LQH3NPN150MGRL is a 15 µH drum-core wirewound inductor in the LQH3 series, shielded with a ferrite core. It carries a continuous current rating of 540 mA and a saturation current floor of 480 mA, meaning the inductance holds stable up to that point before the core begins to saturate — a critical parameter for sizing the inductor in a buck converter's output filter where the peak inductor current exceeds the DC load current.
Parametric fit for a power-stage inductor
Maximum DC resistance of 468 mOhm sets the I²R conduction loss — at the full 540 mA rating the copper loss is roughly 136 mW, which the 105°C rated operating temperature can handle without derating in still air. The self-resonant frequency of 15 MHz sits well above the typical 1–2 MHz switching frequency of modern point-of-load converters, so the parasitic capacitance does not degrade the impedance in the passband. The shielded construction contains the magnetic field, reducing radiated EMI into adjacent traces or sensitive analog circuits on the same board.