A 375 nA Input Off Current Schmitt Triger LDO for Energy Harvesting IoT Sensors

Abstract

This paper introduces 375 nA input off current Schmitt trigger LDO, which is suitable for receiving the power from high internal impedance energy harvesting power sources. The Schmitt trigger LDO consumes 375nA input current at the input voltage of 0.5V, and occupies 276 × 295 um area using 0.18 um CMOS technology. The proposed Schmitt trigger LDO is used to make an Energy Harvesting Illumination Beat Sensor Node, so that the sensor node wirelessly transmits the data of illumination from 780 to 1540 lx without battery.