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

Method used

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

Examples

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Example Embodiment

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

[0028] The inventor of the present application has analyzed the voltage stabilizer in the electronic equipment in the prior art. The mainstream regulators mainly include low dropout regulator (LDO) and diode regulator. Among them, the LDO can be divided into analog LDO and digital LDO.

[0029] First of all, 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, which 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 resistor R2, wherein the gate of the driving transi...

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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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