Voltage stabilizer circuit and electronic equipment

Abstract

The invention discloses a voltage stabilizer circuit and electronic equipment. A first end of a power supply circuit of the voltage stabilizer circuit is electrically connected with a first end of a reference voltage circuit, a first end of a power tube driving circuit and a first end of an output power level circuit respectively; the second end of the reference voltage circuit is electrically connected with the second end of the power tube driving circuit; the third end of the reference voltage circuit is electrically connected with the first end of the load feedback circuit; the second end of the load feedback circuit is electrically connected with the second end of the output power level circuit; the third end of the output power level circuit is electrically connected with the third end of the power tube driving circuit; the third end of the load feedback circuit is grounded; the fourth end of the power tube driving circuit is grounded; the fourth end of the reference voltage circuit is grounded; and the voltage stabilizer circuit is used for keeping the output voltage constant according to the temperature change condition and the load change condition. Therefore, the standby power consumption and the cost of the LDO system can be remarkably reduced on the premise that the small area and the small noise are guaranteed.

Description

technical field [0001] The invention relates to the technical field of voltage stabilization, in particular to a voltage regulator circuit and electronic equipment. Background technique [0002] With the explosion of IOT applications of the Internet of Everything, small size, high efficiency, and low power consumption are the future application trends, and the design of power chips has been developing in the direction of low power consumption, high efficiency, and fewer peripheral devices. This is not only about competitiveness, but also helps to save energy, reduce lithium battery usage and pollution. Low-power applications are different from traditional applications. The biggest feature is that when powering such as MCU, WIFI, DSP or Sensor, the power consumption index in normal standby is usually considered, rather than the power consumption index during shutdown. The high power consumption of the power supply system itself has always been a technical difficulty in limit...

AI Technical Summary

Problems solved by technology

However, the power consumption of existing solutions is still high, generally above 10uA, and some designs have an external reference voltage noise filter capacitor above 1uF, which not only increases the BOM cost, but also affects the power-on speed and even increases power consumption.

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