Power saving control circuit and electronic equipment

Abstract

The invention provides a power saving control circuit and electronic equipment. The power saving control circuit comprises an LDO (low dropout regulator), an electrifying impact capacitor, a normally opened switch, a retaining circuit, an MCU (microprogrammed control unit), a first bleeder circuit and a second bleeder circuit; when the MCU is used for detecting whether the normally opened switch is pressed or not in the normal mode, if the normally opened switch is pressed, a low level is input to a first control pin to enter a power saving mode, wherein the normal mode refers to the mode that the MCU outputs high level to the first control pin. According to the power saving control circuit, power consumption of an MCU system with the LDO is reduced furthest during a low power consumption mode, so the power consumption of the MCU which is at an idle state or does not need to work is zero. The power supply for the MCU can be automatically cut off by using the enabling function of a switch pin of the LDO, and the power supply is restarted under proper excitation.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a power-saving control circuit and electronic equipment. Background technique [0002] At present, the MCU (Micro Control Unit, micro control unit) chip design process has a low power mode setting, so that the chip can save more power when it is idle. However, in any current low power consumption mode, only some control units that are not in use are turned off, and the chip still consumes power. [0003] And LDO (Low Drop-Out Regulator, low-dropout linear regulator) is designed in the MCU system to provide a stable and suitable voltage for the operation of the MCU chip. However, in the traditional way of use, the output terminal (Vout) of the LDO can only To provide a stable output voltage, it cannot cut off its own output voltage by itself, let alone restart the output under appropriate incentives. [0004] Therefore, how to ensure that the MCU system with LDO minimizes po...

AI Technical Summary

Problems solved by technology

However, any low power consumption mode currently only turns off some unused control units, and the chip still consumes power.

[0003] And LDO (Low Drop-Out Regulator, low-dropout linear regulator) is designed in the MCU system to provide a stable and suitable voltage for the operation of the MCU chip. However, in the traditional way of use, the output terminal (Vout) of the LDO can only Provide a stable output voltage, cannot cut off its own output voltage by itself, let alone restart the output under appropriate incentives

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