Shielded 1 µH power inductor for DC-DC stages
The LQH32PB1R0NN0L is a shielded drum-core wirewound inductor from Murata's LQH32 series, built for power-supply filtering and DC-DC converter output stages where a compact 1210 footprint and predictable saturation behavior matter. Rated for 2.05 A continuous with a saturation current of 2.3 A, it handles moderate-load rails without the inductance collapse that causes ripple spikes or loop instability. The 54 mOhm max DCR keeps I²R losses low enough that a 2 A load dissipates about 216 mW — well within the thermal budget of the ferrite core and the board copper.
What the ratings mean for your BOM
At 1 µH ±30%, the inductance tolerance is wide — typical for power-grade ferrite inductors — so the design must accommodate the full ±30% spread when setting the converter's crossover frequency and ripple current. The self-resonant frequency of 100 MHz means the inductor behaves inductively well above any switching regulator's fundamental frequency (typically 500 kHz to 2 MHz), so parasitic capacitance is not a concern in that band.