Linear voltage stabilizing system capable of transient state enhancement

Abstract

The invention relates to the field of electronic technologies and specifically relates to a power source system. A linear voltage stabilizing system capable of transient state enhancement comprises a linear voltage stabilizer, wherein the linear voltage stabilizer is used to provide an output voltage to a controlled load. The linear voltage stabilizer comprises an error amplifier and a voltage regulation circuit, wherein the error amplifier compares voltage feedback signals of a reference voltage and a sampling self-output voltage to generate an error amplification signal; the error amplifier is switched between circuit topology with a first gain and circuit topology with a second gain under effects of a second control signal so as to change the size of the error amplification signal; and the voltage regulation circuit is used to generate an output voltage under effects of the error amplification signal. According to the invention, the gain of the error amplifier can be changed before increase or decrease of a load current, so that fluctuations of the output voltage can be reduced; transient state responses can be enhanced; and system performance can be improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a power supply system. Background technique [0002] Low dropout characteristics make LDO (Low Dropout Regulator) an excellent choice for portable and battery-powered fields. With the continuous advancement of technology, the application fields of portable electronics are deepening. The performance requirements are more stringent. The transient response is an important index to measure the performance of the power system, which reflects the ability of the power system to respond quickly to the output voltage when the load changes step by step. The typical application system and internal circuit structure are as follows: figure 1 and figure 2 As shown, when the load current ILOAD jumps, because the output voltage of the circuit cannot transiently track the rapid change of the load current, it is easy to cause large fluctuations in the output voltage, which makes the normal o...

AI Technical Summary

Problems solved by technology

[0002] Low dropout characteristics make LDO (Low Dropout Regulator) an excellent choice for portable and battery-powered fields. With the continuous advancement of technology, the application fields of portable electronics are deepening. The performance requirements are more stringent. The transient response is an important index to measure the performance of the power system, which reflects the ability of the power system to respond quickly to the output voltage when the load changes step by step. The typical application system and internal circuit structure are as follows: figure 1 and figure 2 As shown, when the load current ILOAD jumps, because the output voltage of the circuit cannot transiently track the rapid change of the load current, it is easy to cause large fluctuations in the output voltage, which makes the normal operation of the system face great challenges.

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