ESP32S3 Development Board

The maximum input of DCDC is about 4A after testing. At this time, the output voltage is about 3.10V. The heat is good, at least it is not hot to the touch. The ripple cannot be measured by the instrument.
It is recommended to use low-temperature soldering, and the temperature should not be too high during soldering! ! !
 
Strange phenomenon of the board
       I soldered two boards and used the on-board ch340k download program. The baud rate of low-temperature soldering can reach 921600, and the baud rate of medium-temperature soldering can only be 25600.
       The medium-temperature soldered board is downloaded with a USB to TTL module, and the baud rate can also reach 921600. I suspect that the soldering temperature is too high and the board has hidden damage.
       Using the USB baud rate of esp32s3 itself can reach 921600.
 
Overall cost:
       ESP32S3 N16R8 module - ￥22
       CH340K - ￥2
       TPS63020 - ￥2
       100UF capacitor - ￥1.4
       1.5UH inductor - ￥0.43
       Two Type-c - ￥0.84
       Two ws2812 - ￥0.36
       Other parts - ≈￥2
       Total: ￥31.03
 
Note:
        TPS63020 is difficult to weld, try to use LDO power supply.
        If the standby current of TPS63020 is >50ma, or there is a current sound, it is definitely a problem with your welding. (No rebuttal)