3.7μW 0.8V VCO-integrator-based high-efficiency capacitor-free low-dropout voltage regulator

This paper presents a VCO-integrator-based high-efficiency low-dropout voltage regulator (LDO). Due to the integrator based architecture the LDO has higher efficiency, lower input voltage and better load regulation than traditional operational-amplifier based implementations. The proposed LDO was fabricated in 180nm CMOS technology along with a traditional operational-amplifier based design for comparison. The proposed LDO consumes a power of 3.7μW at 0.8V input and can achieve a drop-out voltage of 100mV and a load regulation of 8.8μV/mA. The proposed LDO is capacitor-free.