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Voltage regulator

A voltage regulator and voltage divider technology, applied in the direction of regulating electrical variables, electrical solid devices, control/regulation systems, etc., can solve problems such as waste, increased system power consumption, and power consumption.

Inactive Publication Date: 2003-05-14
SII SEMICONDUCTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the voltage regulator cannot be shut down
[0016] When the voltage regulator 201 cannot be turned off, the external load 111 continues to wastefully consume power
That is, there arises a problem that the power consumption of the system using the conventional voltage regulator increases

Method used

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Examples

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Embodiment Construction

[0026] Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027] figure 1 is a circuit block diagram showing a configuration example of the voltage regulator according to the present invention. In voltage regulator 101 , conventional voltage divider circuit 206 is replaced by voltage divider circuit 106 . Other structural elements are the same as those of the conventional voltage regulator shown in FIG. 2 .

[0028] The voltage divider circuit 106 can change the impedance ROUT1 when a signal from the logic circuit 109 is input in response to an ON / OFF signal input to the ON / OFF terminal 110 . In the case where an ON signal is input to the ON / OFF terminal 110, the voltage divider circuit 106 increases its impedance, divides the voltage of the output voltage terminal 104 at an appropriate ratio and outputs the divided voltage to the error amplifier circuit 107. In this way, the voltage regulator 101 o...

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PUM

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Abstract

To provide a voltage regulator capable of securely being turned off even if the regulator is used under a high temperature and an impedance of an external load is large. A voltage regulator is provided, which includes a voltage divider circuit that can divide a potential difference between an output voltage terminal and a reference terminal, wherein when the voltage divider circuit inputs an on signal, the voltage divider circuit outputs a constant voltage between the output voltage terminal and the reference terminal, and wherein when the voltage divider circuit inputs an OFF signal, the voltage divider circuit can reduce the impedance thereof.

Description

technical field [0001] The invention relates to a voltage regulator. Background technique [0002] A conventional voltage regulator will be described with reference to the accompanying drawings. [0003] Fig. 2 is a circuit block diagram showing a structural example of a conventional voltage regulator. [0004] As shown in FIG. 2 , the voltage regulator 201 includes an external terminal composed of an input voltage terminal 102 , a ground terminal 103 , an output voltage terminal 104 , and an on / off terminal 110 . The voltage regulator 201 also includes a reference circuit 105 capable of outputting a constant voltage, a voltage divider circuit 206 capable of distributing the voltage of the output voltage terminal 104 at an appropriate ratio, and an error amplifier circuit 107 for adjusting the output voltage by comparing two input voltages with each other. , an output circuit 108 capable of adjusting impedance, and a logic circuit 109 capable of controlling the operation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56G05F1/10G05F1/575
CPCG05F1/575G05F1/10
Inventor 樱井敦司
Owner SII SEMICONDUCTOR CORP