PCB power integrity failures are geometry problems, not component problems. Your voltage regulator outputs clean power. Your IC still has noise. What happens between them is decided by the copper.
Read the full breakdown here:
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Plane pair spacing sets distributed capacitance past the frequency where discrete decoupling caps turn inductive. Plane shape drives cavity resonance. A 4-inch plane with dielectric constant near 4 resonates near 740 MHz, and that is where PDN impedance spikes. Stitching via placement suppresses those resonances by breaking up the cavity. Kirsch Mackey covers all three controls with Sigrity X Aurora simulation data showing impedance before and after.
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