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Voltage regulator and electronic device

A technology for electronic equipment and voltage regulators, applied in instruments, regulating electrical variables, control/regulating systems, etc. low consumption effect

Inactive Publication Date: 2018-11-02
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what working mode the load circuit is in, the internal devices of the LDO always consume a certain amount of static power consumption, which is unacceptable for low-power electronic equipment that is sensitive to power consumption

Method used

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  • Voltage regulator and electronic device
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  • Voltage regulator and electronic device

Examples

Experimental program
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Embodiment Construction

[0027] As mentioned in the background section, the static power consumption of the low dropout regulator (LDO for short) in the prior art is relatively large, which is unacceptable for low-power electronic devices that are sensitive to power consumption.

[0028] The inventors of the present application have analyzed voltage regulators in electronic equipment in the prior art. Mainstream voltage regulators mainly include low dropout linear regulator (low dropout regulator, LDO for short) and diode regulator. Wherein, the LDO can be classified into an analog LDO and a digital LDO.

[0029] first, figure 1 It is a schematic diagram of the circuit structure of an analog LDO. see figure 1 , the analog LDO100 is powered by the power supply voltage AVDD, and is suitable for providing the driving voltage Vout to the load RL. The analog LDO 100 may include: a bandgap reference circuit 101 , an operational amplifier OP, a driving transistor MP1 , a first resistor R1 and a second re...

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PUM

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Abstract

The invention relates to a voltage regulator and an electronic device. The voltage regulator comprises a power supply input end, a load output end and a plurality of weight driving circuits connectedwith one another in parallel. The power supply input end is configured to be connected to power supply voltage; the load output end is configured to provide driving voltage for a load circuit; input ends of the weight driving circuits are coupled to the power supply input end, output ends of the weight driving circuits are coupled to the load output end, control ends of the weight driving circuitsreceive respective weight selection signals, the weight driving circuits have different current driving capabilities or the same current driving capability, and the weight selection signals are usedfor controlling the weight driving circuits to be turned on or turned off and determined based on an operating mode of the load circuit . The scheme can reduce static power consumption of the voltageregulator to meet low power consumption application demands of the electronic device.

Description

technical field [0001] The invention relates to the field of electronic circuit design, in particular to a voltage stabilizer and electronic equipment. Background technique [0002] Nowadays, electronic devices are gradually developing towards the trend of miniaturization and low power consumption. At the same time, low-power electronic devices such as Internet of Things (Internet of Things, IOT) devices and wearable devices have emerged on the market. Taking an IOT device as an example, its load circuit generally switches between different working modes. Most of the time, its load circuit works in sleep mode, and the required power supply current is very small, generally only a few μA; every once in a while, its load circuit will switch to active mode. Under the condition, the sensor in the load circuit starts to work, or the detection data of the sensor is transmitted externally to synchronize the data. The activation mode generally lasts for a short time, but the requir...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 杨家奇郭俊涛黄正乙
Owner SEMICON MFG INT (SHANGHAI) CORP
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