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Energy harvesting has been considered to be a good solution to power many IoE applications [1–3]. Some applications require regulated supply voltage, while on the other hand, any extra energy should be stored in the storage element, such as a rechargeable battery, to maximize the total system efficiency. As the power delivery density is small in the energy-harvesting application, using a single inductor...
A 110nA quiescent current (IQ) buck converter for ultra-low power application is presented. A novel zero IQ pull-down structure, which consists in native NMOS and PJEF, is proposed to achieve zero-power supply monitor and save the total IQ. Implemented in 0.35um CMOS process, the converter realizes 78% efficiency in 1uA load and over 90% for load range from 5uA to 100mA. With adaptive-bias hysteresis...
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