ENERGY-HARVESTING ICs SUPPLY ALL SYSTEM VOLTAGES DIRECTLY FROM TRANSDUCERS

摘要

The LDO output is for running the system controller. It provides a regulated 2.2-V output at 3 mA. The higher of VAUX or VOUT powers the LDO, enabling it to become active as soon as VAUX has charged to 2.3 V, while the VOUT storage capacitor is still charging. In the event of a step load on the LDO output, current can come from the main VOUT capacitor if VAUX drops below VOUT.