Active AEC-Q200 shielded power inductor for 1.3 A rails
The Coilcraft LPS6235-822MRC is an active-production shielded drum-core inductor rated 8.2 µH ±20% with a continuous current of 1.3 A and a saturation floor of 2.5 A. That certification also implies a controlled manufacturing line and lot-traceability — relevant for any BOM that requires PPAP-level documentation.
8.2 µH, 1.3 A continuous — the power rail filter decision
The 8.2 µH inductance at 100 kHz test frequency is a common value for point-of-load buck converters switching between 200 kHz and 2 MHz. The 48 MHz self-resonant frequency sits well above the converter's switching band — the inductor behaves as a pure inductive element through the operating frequency, with parasitic capacitance only becoming relevant above 10 MHz. The 1.3 A continuous rating is the DC current at which the temperature rise reaches the datasheet's limit (typically 40°C rise above ambient). The 2.5 A saturation current is the point where inductance drops by 10% — a hard ceiling for peak transient currents. In a 12 V to 3.3 V buck at 500 kHz, the inductor ripple current is roughly 30% of the DC load; the peak current stays below 2.5 A for loads up to about 1.8 A, giving margin above the continuous rating. Shielded ferrite construction contains the magnetic field lines within the core — this matters when the inductor sits close to sensitive analog traces, RF front-ends, or other inductors in a multi-phase rail.
Active production — quoted per BOM quantity
The 2424 footprint is shared across Coilcraft's own LPS6235 family at different inductance values, but a direct parametric substitute from a different brand would require validating the DCR, saturation current, and AEC-Q200 grade against the original spec.