Abstract
The aim of the study is to develop and verify behavioural models of a linear negative voltage regulator. This paper presents the process of building behavioural models of a linear negative voltage regulator with 3.3 V fixed value of the output voltage and with an adjustable negative output voltage from the reference voltage value of 1.25 V to 20 V. As a prototype model, the MC79L stabilizer manufactured by OnSemiconductor and its closest functional analogues LM337L, LT1964, LT3032 are selected. Behavioural models of linear stabilizers are implemented in the SPICE language based on functional blocks that fulfil mathematical dependencies and constraints. Simulating integrated circuits is carried out in the time domain and in static modes using the OrCad end-to-end simulation software package. The simulation verification confirms the data result adequacy presented in the chip manufacturers’ technical specifications. The proposed behavioural model of a linear stabilizer can be applied in modern specialized CAD systems for circuit design and simulation in developing, designing and studying power supply devices for radio-electronic and industrial equipment.
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