LDO (low dropout regulator) circuit realizing floating output

A technology for outputting circuits and circuits, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc.

Inactive Publication Date: 2016-12-21
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional LDO circuit will stop working, and wa

Method used

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  • LDO (low dropout regulator) circuit realizing floating output
  • LDO (low dropout regulator) circuit realizing floating output
  • LDO (low dropout regulator) circuit realizing floating output

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Embodiment Construction

[0013] The specific structure of the floating output LDO circuit of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] figure 1 It is a schematic structural diagram of an LDO circuit with floating output according to an embodiment of the present invention.

[0015] Such as figure 1 As shown, in some embodiments of the present invention, a floating output LDO circuit includes an operational amplifier circuit 10 and an output circuit 20.

[0016] The operational amplifier circuit 10 includes a forward input terminal inp, a reverse input terminal inn1, a reverse input terminal inn2, and an output terminal op_out. The two reverse input terminals inn1 and inn2 of the operational amplifier circuit select one input as required, and the operation The amplifier circuit 10 makes the voltage of the forward input terminal inp and the voltages of the terminals inn1 and inn2 of the reverse input terminal equal (for exampl...

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PUM

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Abstract

An embodiment of the invention discloses an LDO (low dropout regulator) circuit realizing floating output. The LDO circuit comprises an operational amplifier circuit 10 and an output circuit 20, wherein the operational amplifier circuit 10 comprises two reverse input ends and a forward input end; the output circuit 20 is connected to the operational amplifier circuit 10 and used for supplying a feedback loop from input to output to the operational amplifier circuit 10. In the embodiment, input cannot be performed simultaneously at the two reverse input ends of the operational amplifier circuit 10, proper input is selected as required, and floating output voltage is generated through the output circuit 20. By means of the LDO circuit realizing floating output, chip work can be started in a more energy-saving, efficient and rapid manner, and compared with a conventional LDO circuit, the LDO circuit realizing floating output has better practical application value.

Description

Technical field [0001] The invention relates to the technical field of integrated circuit switching power supplies, in particular to a floating output LDO circuit. Background technique [0002] Nowadays, portable electronic devices have been widely used in the fields of life and industry, and power integrated circuits as a prerequisite for the development of electronic device technology have become a hot spot in the entire integrated circuit research. [0003] From the perspective of portability, mobile devices require a relatively small power supply volume and mass. But mobile devices also need better battery life, which requires a large power source and can power the device for a long time. These two points require the power supply to have the characteristics of small size and high energy at the same time, that is, the power supply must have high conversion efficiency. Linear Low Dropout Regulator (LDO) is a new generation integrated circuit regulator with low power consumption...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 周云侯森林谢法彪蒋伟阙隆成
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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