Electricity-saving control circuit and electronic equipment

Abstract

The invention provides an electricity-saving control circuit and electronic equipment. The electricity-saving control circuit comprises an LDO, a power-on impact capacitor and an MCU, the LDO comprises a power source input pin, a switch pin and a power source output pin, one end of the power-on impact capacitor is connected with the power source input pin, the other end of the power-on impact capacitor is connected with the switch pin, the MCU comprises an MCU power source pin and an MCU control pin, the MCU power source pin is connected with the power source output pin, and the MCU control pin is connected with the switch pin. The MCU is used for being triggered by a preset trigger condition to output low levels to the MCU control pin under a normal mode to enter in an electricity saving mode, and according to the normal mode, the MCU outputs high levels to the MCU control pin. According to the electricity-saving control circuit and the electronic equipment, power consumption can be reduced to the maximum extent when an MCU system with the LDO is in a low power consumption mode, and the electricity consumption is zero when the MCU is idle or does not need to work. The enabling control function of the switch pin of the LDO is utilized, the power supply of the MCU can be powered off automatically, and the power supply can be 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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