This function provides up to 150mA at 3.3V from a LiPo battery and/or an micro-USB connection. It is based on the MCP7383x from Microchip to manage power from the USB port and the LiPo battery, and the TPS78233 from Texas Instruments to regulate it to 3.3V.
- USB connector
- LiPo battery connector (but not the battery itself)
- power ON/OFF switch
- LED indicating whether the LiPo battery is being charged from USB
- you can choose whether or not to connect the USB lines to the host (if it can handle it), so that it can be recognized by a computer via USB