Analysis and design of a fully-integrated charge pump circuit: EMI reduction and configurable output voltage

Charge pump (CP) circuits are frequently utilised to augment an input direct-current (DC) voltage and permit a high-voltage conversion ratio for a plethora of applications, including flash memory and energy harvesting systems. In contrast to inductors employed in boost converters, CP can be integrated on a microchip due to its composition of switches and capacitors. The objective of this research project is to conduct a comprehensive analysis of the integration of a charge pump circuit into the chip design with the intention of supplying floating drivers with a maximum output voltage of 85V to ground. The primary constraints of the project are the maximum allowable voltage drop when the drivers are enabled and the minimisation of electromagnetic interference (EMI) affecting the entire system. The opening chapters are devoted to an analytical examination of the diverse categories of switched capacitor DC-DC converters, whereas the subsequent chapters concentrate on the configuration of the principal operational frameworks of the project and a exhaustive investigation of EMI. In conclusion, a design analysis is conducted to render the charge pump circuit capable of providing two distinct output voltages: one for supplying the floating drivers and another for MOTP (one-time programmable memory) operation.