How to suppress power supply ripple in a power DTU?

Suppressing DTU power supply ripple requires multi-stage filtering and voltage regulation techniques. An LC filter should be deployed at the switching power supply output, using a power inductor PWR6045R6R8M0T (6.8μH) and a low-ESR solid-state capacitor (470μF). For high-frequency ripple, multiple ceramic capacitors (100nF + 10nF) should be connected in parallel. A linear regulator LDO (such as AMS1117-3.3) should be used to power the analog circuit to improve the power supply rejection ratio (PSRR > 60dB@10kHz). On the PCB layout, power traces should be short and wide, avoiding loops. Ripple measured with an oscilloscope should be less than 50mVpp. Suppressing ripple improves ADC sampling accuracy and reduces data errors.