Ultra low power capacitive power management unit in 0:18μm CMOS

Abstract

This paper presents the design and simulation of a two stage power management circuit implemented in 0:18μm CMOS that operates from very low voltages starting from 460mV and higher up to a maximum of 800mV. The proposed capacitive power management unit consumes very low power of 11μW @ 500mV sufficient to be operated from tiny photovoltaic cells, dimensions of few mm2. In addition to the lower power consumption, the proposed circuit does not need any off chip components; ideal for ultra low power wireless sensor nodes.