X8j6l Schematic -

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| Test | Expected result | |------|-----------------| | Vin‑to‑Vout drop (measure with 12 V in, no load) | ≈ 0.15 V | | Load regulation (apply 150 mA via a power resistor) | Vout stays within ±2 mV of 5 V | | Line regulation (vary Vin from 10 V to 14 V) | Vout variation ≤ 0.5 % | | Noise (FFT) | Peak‑to‑peak < 20 µV RMS in the 10 Hz‑100 kHz band | | Thermal (continuous 150 mA) | Junction temperature < 85 °C after 10 min (check with IR camera or on‑chip temp sensor). | x8j6l schematic

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The schematic calls for 100nF decoupling capacitors on every power pin of the MCU. While this is standard, the physical layout (not visible in the schematic but implied by net names) requires these to be within 3mm of the pins. If the PCB layout diverges from this constraint, the x8j6l will suffer from voltage droop during high-frequency switching. Component databases :