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Negative voltage linear regulator

A linear stabilized voltage source, negative voltage technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as voltage overshoot, excessive load current impact, etc.

Active Publication Date: 2018-02-16
HUNAN GOKE MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a negative voltage linear voltage regulator, which aims to solve the problems of the existing linear voltage regulator that are easy to cause instantaneous voltage overshoot and excessive load current impact, etc.

Method used

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  • Negative voltage linear regulator

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] see figure 1 , the present invention provides a negative voltage linear regulated source, comprising a negative voltage linear regulated source and a soft-start circuit, the soft-start circuit comprising a first transistor PM1, a second transistor PM2, a third transistor PM3, a first enabling Enabling switch NM2, the second enabling switch NM3, capacitor C1 and constant current source I1 are used to prevent the output voltage from overshooting; the negative voltage linear regulated source includes an error amp...

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Abstract

The invention provides a negative voltage linear regulator. The negative voltage linear regulator comprises a negative voltage linear regulator body and a soft start circuit, wherein the soft start circuit comprises a first transistor, a second transistor, a third transistor, a first enabling switch, a second enabling switch, a capacitor and a constant flow source and is used for preventing outputvoltage overshoot; the negative voltage linear regulator body comprises an error amplifier, an output power tube, a first feedback resistor and a second feedback resistor and is used for providing stable negative output voltage. Compared with the prior art, the negative voltage linear regulator with the soft start function is simple in structure, high in regulation performance, low in cost and easy to obtain and integrate.

Description

technical field [0001] The invention relates to electronic circuits and semiconductors, in particular to a negative voltage linear stabilized voltage source. Background technique [0002] With the scale and high integration of integrated circuits, the requirements for the power supply voltage of each component are different. The output power of the linear voltage regulator is lower than the input power, and the response speed is fast, which is indispensable in highly integrated circuit equipment. The low-dropout linear regulator (LDO) is a new integrated circuit regulator with a high power supply rejection ratio, and keeps the output voltage stable by integrating an error amplifier and an output power tube. [0003] LDOs in the prior art are prone to transient output voltage overshoot and load current impact, affecting the service life of the circuit, while the LDO circuit with soft start function has a complex structure and is not suitable for linear regulators with negativ...

Claims

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Application Information

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IPC IPC(8): G05F1/56
Inventor 喻彪谢俊杰李天望邓春惠姜黎
Owner HUNAN GOKE MICROELECTRONICS
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