Tauno Erik posted: " My face-shape PCBs have arrived - kindly made by Seeed Studio Fusion service. On the backside, there are one XIAO RP2040 microcontroller and two synchronous buck converters to make 5 and 3.3 voltages. I found these Synchronous Bu" Tauno Erik
I found these Synchronous Buck Converter schematics, made by @wagiminator I incorporated them into my board design and it works pretty well. Input voltage 4.5V - 16V. The output voltage depends on resistors. And I didn't have the right size SMD inductors so I used through-hole ones.
Unfortunately my design contained two mistakes:
Wrong footprint size for inductors (L1, L2). That was easy fix as you can see from images.
MCU board pins are flipped. Those on the left are on the right and vice versa. So I have to desolder it and turn around.
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