Low-dropout linear voltage stabilizing circuit

Abstract

The invention provides a low-dropout linear voltage stabilizing circuit, which comprises an error amplifying circuit, a charge pump circuit, and an output feedback circuit. The output terminal of theerror amplifying circuit is connected with the input terminal of the charge pump circuit; the charge pump circuit comprises a first switch module, a first energy storage module, a third switch module,a stray capacitance, a second switch module, a second energy storage module, and a clock control circuit; the clock control circuit is connected to the first switch module, the second switch module,and the third switch module so as to control the closing and opening of the first switch module, the second switch module, and the third switch module; the output terminal of the charge pump circuit is connected to the output feedback circuit; and the output feedback circuit is connected to the error amplifying circuit. The provided low-dropout linear voltage stabilizing circuit can provide a higher voltage and reduces the voltage fluctuation.

Description

technical field [0001] The embodiments of the present application relate to the field of electronic technology, and in particular to a low-dropout linear regulator circuit. Background technique [0002] For a low-dropout linear regulator (English; Low Dropout Regulator, LDO), in order to achieve a faster response, an N-type metal oxide semiconductor field effect transistor (English: Metal Oxide Semiconductor Field Effect Transistor, MOS) is usually used as the output power transistor. Because the N-type MOS transistor has greater mobility, it can provide a larger current in the same area, and the source negative feedback also makes the N-type MOS transistor more capable of transient response. However, N-type MOS tubes need to consume more voltage margin, which is difficult to apply under low power supply voltage. Contents of the invention [0003] In view of this, one of the technical problems solved by the embodiments of the present application is to provide a low-dropou...

AI Technical Summary

Problems solved by technology

[0003] In view of this, one of the technical problems solved by the embodiments of the present application is to provide a low-dropout linear voltage regulator circuit to overcome the defect that the N-type MOS transistor in the low-dropout linear voltage regulator in the prior art is difficult to apply

Images