%0 Electronic Article %A N. Khosropour %A F. Krummenacher %A M. Kayal %K CMOS process %K battery charging %K miniaturised solar cells %K rechargeable microbattery %K Ni %K micropower solar energy harvesting %K size 0.18 mum %K fully integrated ultra-low power management %K NiMH microbattery %X A fully integrated, area-efficient and ultra-low power management system for micro-power solar energy harvesting applications is proposed. This system harvests energy from miniaturised solar cells connected in series to charge a rechargeable microbattery. This circuit occupies less area compared to conventional inductive and switched-capacitor DC-DC converters, while achieving better efficiency during battery charging. Owing to very low power consumption of the circuit, efficiency remains high even under reduced light intensity. The proposed circuit was fabricated in a 0.18 µm CMOS process and occupies a core area of only 0.15 mm2 to charge a NiMH microbattery. The average power consumption of the whole power management system is less than 300 nW. %@ 0013-5194 %T Fully integrated ultra-low power management system for micro-power solar energy harvesting applications %B Electronics Letters %D March 2012 %V 48 %N 6 %P 338-339 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=2frm25euxoyce.x-iet-live-01content/journals/10.1049/el.2012.0315 %G EN