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Fast-Startup High-Efficiency Tripler Charge Pump in Standard 0.18-μm CMOS Technology

A new tripler charge pump with switch bootstrapping technique is presented. The circuit is fully integrated in a standard 0.18-μm CMOS process and operates with a 1.8-V supply. Analysis and measurement results demonstrate a faster startup transient than the conventional design and, at the same time, a lower energy consumption when charging a capacitive load. In static conditions, driving capability and conversion efficiency are improved as well.