8.2 µH wirewound in a 1210 footprint
The Murata LQH32MN8R2K23L is a drum-core, wirewound inductor in the LQH32 series, rated for 8.2 µH ±10% at 1 MHz with a 225 mA continuous current rating.
Q factor and self-resonant frequency
A Q of 20 at 1 MHz and a self-resonant frequency of 23 MHz define the useful band. Below resonance the inductor behaves as a pure inductive element; above it the parasitic capacitance dominates and the impedance rolls off. For a DC-DC converter switching at 500 kHz to 2 MHz, the 23 MHz SRF gives plenty of margin — the inductor stays inductive across the switching harmonics.
Unshielded ferrite core — placement matters
The ferrite core is unshielded, so the external magnetic field couples into adjacent traces or components. On a dense board keep a keep-out zone around the inductor — at least one part width (3.2 mm) from sensitive analog loops or high-impedance nodes.