The CD4051B is a digitally-controlled analog multiplexer/demultiplexer having a very low ON impedance and very low OFF leakage current. This is an 8-channel analog multiplexer/Demutiplexer and it has three digital control inputs.
This BQ29700 is a single-cell Li-ion/Li-polymer battery protection IC from Texas Instruments. BQ29700 features all the standard protection features such as Overcharge, Over-discharge, Charge overcurrent, Discharge overcurrent, and Load short-circuit protections.
The LTC2942 is a high-precision power and energy monitor manufactured by Analog Devices. It is capable to monitor the voltage, charge, and temperature.
The FDC1004 is a 4-channel capacitance-to-digital converter. Which is designed to fabricate capacitance-sensing devices or modules. Each channel can accurately measure capacitance changes within the ±15 pF range.
The MCP23017 is a widely used 16-bit I/O expander manufactured by Microchip Technology. It facilitates parallel input/output expansion for microcontrollers via the I2C serial interface.
The TNY280 is an energy-efficient AC-to-DC converter IC belonging to the TinySwitch-III series from Power Integrations. It features an integrated high voltage, 700V power MOSFET with control circuitry.
The TPS60403 is an unregulated charge pump voltage inverter IC from Texas instruments. It has a wide working voltage ranging from 1.6V to 5.5V. One interesting fact is that the TPS60403 requires only three 1uF capacitor to operate.