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Voltage regulator with improved voltage regulator response and reduced voltage drop

A voltage regulator and voltage technology, applied in instruments, static memory, adjusting electrical variables, etc., can solve the problems of voltage regulator response time, large wiring area, etc.

Active Publication Date: 2015-01-14
NAN YA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous designs, improving the response time and voltage drop of the voltage regulator required additional power consumption and large routing area

Method used

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  • Voltage regulator with improved voltage regulator response and reduced voltage drop
  • Voltage regulator with improved voltage regulator response and reduced voltage drop
  • Voltage regulator with improved voltage regulator response and reduced voltage drop

Examples

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Embodiment Construction

[0025] figure 1 A voltage regulator 10 showing an embodiment of the present invention is used to compensate frequency response and reduce voltage drop. Such as figure 1 As shown, the voltage regulator 10 includes an output driver 14 configured to provide an output current and an output voltage to an output terminal Vout connected to a load 16 . The voltage regulator 10 further includes an error amplifier 11 configured to control the output driver 14 with reference to a feedback signal from the output voltage.

[0026] The error amplifier 11 can be a difference amplifier or an operational transconductance amplifier. The operational transconductance amplifier has an input terminal connected to a reference voltage source VregRef to provide a stable bandgap voltage; an input terminal VFB connected to an output terminal of the output driving device 14; and an output terminal Vout, A regulated voltage is provided to an input terminal of the output driver 14 .

[0027] The voltag...

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PUM

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Abstract

A voltage regulator includes an output drive device configured to provide an output voltage to an output terminal; an error amplifier configured to control the output drive device by taking into consideration a feedback signal from the output voltage; a first compensation unit configured to provide a first compensation signal to compensate an output signal of the error amplifier; and a second compensation unit configured to provide a second compensation signal to compensate an input signal of the error amplifier, wherein second compensation unit comprises at least two capacitors and at least one transistor configured to control the coupling of the two capacitors.

Description

technical field [0001] The present invention relates to a voltage regulator, and more particularly to a voltage regulator with improved response and reduced voltage drop. Background technique [0002] Integrated circuits of linear voltage regulators are widely used in electronic systems, especially in applications requiring low noise and low ripple power supplies. In dynamic memory, a regulated power supply with low dropout output supplies voltage to the array periphery, such as the data path, to other noise-sensitive analog circuit blocks. [0003] In conventional voltage regulators, response time and voltage drop have a great influence on the effectiveness of the voltage regulator. A fast response time can regulate the voltage more quickly, while a low voltage drop can reduce the ripple of the output voltage. Additional feedback resistors and feedback capacitors can improve device performance. However, in low power devices, the voltage regulator needs to enter power sav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG11C5/147G05F1/56
Inventor 万远忠潘栋
Owner NAN YA TECH