V.K. Bityukov, A.V. Bogatov, N.G. Mikhnevich, V.A. Petrov

A new method is developed for the study of key features of buck/boost stabilized power supplies based on regulated charge pump DC-DC converters. The method enables to set the required input voltage, to adjust the load resistance and output current, to test load transient response. The test bench is organized using modular architecture. In includes the power supply, input, charge pump and display modules. The control module based on microcontroller PIC18F2550 rules over these modules. In its part, the control module, just as a multimeter and a digital oscilloscope, is under control of personal computer. A controlled research of the key operating characteristics of unique MAX1759 integrated circuit is carried out. It allows the input voltage to be higher or lower than the regulated output voltage. The obtained results enable to interpret the algorithm of operation of this integrated circuit.