A linear step-down regulator circuit and electronic equipment

Abstract

The invention discloses a linear step-down regulating circuit and electronic equipment, comprising: a first voltage-dividing electronic component; a second voltage-dividing electronic component connected in series with the first voltage-dividing electronic component; With the cooperation of electronic components, the input voltage of the linear step-down regulation circuit is divided, and the voltage at both ends of itself is used as the output voltage of the linear step-down regulation circuit; the overvoltage detection regulation circuit is used when the output voltage is greater than the preset first When a voltage threshold is reached, the voltage division ratio of the first voltage-dividing electronic component to the input voltage is increased; the under-voltage detection adjustment circuit is used to increase the second voltage-dividing electronic component when the output voltage is lower than the preset second voltage threshold. The voltage division ratio of the component to the input voltage; wherein, the preset first voltage threshold ≥ the preset second voltage threshold. It can be seen that the present application keeps the output voltage of the linear step-down regulation circuit within a certain range, thereby improving the overall working quality of the electronic equipment where the linear step-down regulation circuit is located.

Description

technical field [0001] The invention relates to the field of linear step-down, in particular to a linear step-down regulating circuit and electronic equipment. Background technique [0002] At present, most of the existing linear step-down circuits use resistors of different resistances to divide the input voltage of the linear step-down circuit, so as to achieve the purpose of stepping down. However, once the voltage dividing resistors in the linear step-down circuit are selected, the step-down degree of the linear step-down circuit is a fixed value. If the input voltage of the linear step-down circuit is disturbed, the voltage obtained by stepping down (the output voltage of the linear step-down circuit) cannot meet the voltage demand of the subsequent circuit, which will affect the overall working quality of the electronic equipment where the linear step-down circuit is located. [0003] Therefore, how to provide a solution to the above technical problems is a problem th...

AI Technical Summary

Problems solved by technology

If the input voltage of the linear step-down circuit is disturbed, the voltage obtained by stepping down (the output voltage of the linear step-down circuit) cannot meet the voltage requirements of the subsequent circuit, which will affect the overall working quality of the electronic equipment where the linear step-down circuit is located.

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