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voltage regulator

A voltage stabilizer and voltage technology, applied in the direction of electrical components, high-efficiency power electronic conversion, and conversion equipment without intermediate conversion to AC, can solve the problems of small occupied area, high efficiency, small standby current, etc., and achieve small occupied area , high efficiency and low standby current

Active Publication Date: 2015-12-09
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of complex circuit, large occupied area, low efficiency and large standby current in the above-mentioned prior art voltage stabilizer circuit, the main purpose of the present invention is to provide a voltage stabilizer, which is not only suitable for low power supply voltage voltage, and has the advantages of simple circuit, small occupied area, small standby current and high efficiency

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Embodiment Construction

[0021] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0022] figure 2 It is a detailed circuit diagram of a preferred embodiment of a voltage regulator of the present invention. In a preferred embodiment of the present invention, the voltage regulator can be used for flash memory or phase change memory, according to figure 2 , a voltage regulator of the present invention includes a first charge pump 201 , a limiter circuit 202 , and a start...

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Abstract

The invention discloses a voltage regulator, which comprises a first charge pump, an amplitude limiting circuit and a starting / closing control circuit, wherein the first charge pump is used for generating and outputting working voltage under the control of an enabling signal of a charge pump; the amplitude limiting circuit is connected to the output end of the first charge pump and an external read operation control signal so as to clamp the working voltage output by the first charge pump under the control of the external read operation start signal; and the starting / closing control circuit is used for generating a first control signal and a second control signal under the output control of the first charge pump and enabling the first control signal and the second control signal to generate the enabling signal of the charge pump through an RS (Reset-SET) trigger. The voltage regulator disclosed by the invention is not only applicable to a condition that power supply voltage is low voltage but also has the advantages of simple circuit, small occupation area, low standby current and high efficiency.

Description

technical field [0001] The invention relates to a voltage stabilizer, in particular to a voltage regulating circuit used in the case of a low voltage supply voltage. Background technique [0002] A charge pump is a capacitive voltage converter that can be used to step up or down a voltage, or to generate a negative voltage. Because of its simple circuit and high efficiency, it is widely used in integrated circuits powered by a single power supply. For example, in an electrically erasable programmable read-only memory (EEPROM) or flash memory (FlashMemory), the charge pump converts the power supply voltage into a high voltage signal higher than the power supply voltage to drive the read and write operations of the load, EEPROM or FlashMemory. [0003] However, since the output voltage generated by the charge pump often deviates from the required value under the condition of no limitation, a voltage regulation circuit is often required to obtain a relatively stable output vol...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07H02M1/36
CPCY02B70/16Y02B70/10
Inventor 杨光军
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP