A multi-source energy harvesting chip was designed in a standard 018 μm CMOS process, which could efficiently collect piezoelectric, photoelectric, thermoelectric and RF energy simultaneously. The collecting chip consisted of a variety of energy interface circuits, a reconfigurable charge pump and an adaptive control circuit. In the reconfigurable charge pump, the charge redistribution loss was reduced by adjusting the voltage conversion rate and switching frequency, the conversion efficiency was improved, and the input voltage range was expanded. In the adaptive control circuit, the output voltage of the system was controlled by the constant on-time method, and the peak voltage generated was multiplexed to control the working state of the charge pump, which reduced the complexity and power consumption of the circuit. The simulation results showed that the overall dynamic power consumption of the chip was 33 μW, and the maximum energy conversion efficiency was 603%. The layout size was 1 672 μm×1 990 μm..