150 µH shielded power inductor for automotive and industrial DC-DC
The Coilcraft LPS6235-154MRC is a 150 µH shielded drum core inductor in the LPS6235 series, rated for 530 mA continuous current with a saturation current floor of 370 mA. The 535 mOhm max DCR sets the copper loss at full rated current to about 150 mW — manageable for a 6.2 mm square part, but worth checking against your thermal budget if the ambient runs near the 125 °C ceiling. The AEC-Q200 qualification means this inductor has passed the full automotive-grade stress suite: thermal shock, humidity bias, mechanical shock, and vibration.
Saturation headroom and DC bias derating
The 370 mA saturation current is the DC bias level at which inductance typically drops 10-20% — not a hard failure point, but the effective inductance at your load current may be lower than the 150 µH no-load value. For a 300 mA buck converter output, the inductor sees about 80% of its saturation rating, which is a comfortable margin for most designs. If your peak transient current exceeds 370 mA, the inductance will roll off and ripple current will increase. The self-resonant frequency of 7.3 MHz is well above the 100 kHz test frequency and typical switching frequencies for this inductance range (100-500 kHz). The ferrite core material gives stable inductance over temperature, though the saturation current itself shifts with core temperature — derate the Isat figure by about 15% at 125 °C ambient.
Package and hand-solderability
The footprint is a standard 6.2 x 6.2 mm power inductor land pattern — two large pads on the short edges, no centre pad. The shielded construction means the ferrite can sits flush against the winding, so magnetic flux leakage into adjacent traces is minimal; you can place it within 2-3 mm of a sensitive analog circuit without coupling issues.