Quick transient response LDO (Low Drop Out) voltage stabilizer circuit based on inverter

Abstract

The invention provides a quick transient response LDO (Low Drop Out) voltage stabilizer circuit based on an inverter. The quick transient response LDO voltage stabilizer circuit comprises a band-gap voltage reference source, an error amplifier, an inverter module and a power module, wherein the power module comprises a power tube, wherein a source electrode of the power tube is connected with input voltage; a drain electrode is output to output voltage of the LDO stabilizer circuit; a positive input end of the error amplifier is connected with feedback voltage; a negative input end of the error amplifier is connected with an output end of the band-gap voltage reference source; an output end of the error amplifier is connected with the inverter module; an input end of the inverter module isconnected with the output end of the error amplifier; and an output end of the inverter module is connected with a gate electrode of the power tube. The quick transient response LDO voltage stabilizer circuit disclosed by the invention has the advantages that under the premise of ensuring low power consumption, the transient response speed is effectively improved, the transient change of output voltage is reduced, and a linear adjustment ratio and a load regulation ratio are increased; and through performance simulation, the reliability of the performance of the circuit is proved, and the circuit has a giant application space in the field of low voltage power supply.

Description

technical field [0001] The invention relates to the field of circuits, in particular to an inverter-based fast transient response LDO regulator circuit. Background technique [0002] As the Internet of Things (LoT) plays an increasingly important role in our homes and offices, we will find more and more devices and systems integrating electronic components. Using an efficient power management system can effectively reduce the power consumption and prolong the service life of IoT devices and wearable devices. Low Dropout Regulator (LDO for short), as a kind of power management chip, occupies an important position in power management IC, and its market share exceeds 20%. There is no doubt that the development of the Internet of Things will inevitably create greater demand and higher requirements for LDOs. Designing a new type of LDO with low power consumption, high efficiency, fast transient response and no external capacitor has become a research hotspot of LDO. [0003] T...

AI Technical Summary

Problems solved by technology

Then a dynamic bias technology is proposed, which can dynamically adjust the bias current according to the magnitude of the output current, but when the output current is large, the quiescent current is still relatively large, which is not conducive to energy saving

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