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A lipo charger with a buck built-in

We often have projects that want to run off a lipo, but you need an external regulator to handle the conversion from 3.7~4.2V down to 3.3V. This little board will do the job for you: it has USB Type C power and a 500mA charger chip for standard 1-cell poly/liion cells. a TLV62569 3.3V buck converter will give you a nice 3.3V output (https://www.adafruit.com/product/4711) at up to 1A max without worrying about heat or LDO power lossage.