In this paper we describe differential circuit of charge pump for voltage management systems, their evolution and improvement in design. The systems are powered by solar cells and generate different voltage levels which are suitable for systems on-chip integrated regulator applications. The voltage regulator outputs voltage from low power digital circuit, -2V for memory, and from 2V to 12V for input and output components. The circuits were simulated using LT SPICE software.

• 권승탁(Seonam University Dept. of Computer Imformation) | Seung-tag Kwon
• 김형진(Chonbuk National University College of Engineering Dept. of IT Applied System Engineering) | Hyung-jin Kim
• 이계철(Member, Kunjang University College Dept. of Automotive & Mechanical Engineering) | Kye-cheul Lee Corresponding Author