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Low Dropout Regulator Based on Subthreshold Region

A low-dropout voltage regulator and low-dropout technology, which is applied to instruments, control/regulation systems, and electrical variable adjustments, can solve problems such as difficult control, achieve stable work, and reduce current mismatch.

Active Publication Date: 2022-06-24
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sub-threshold region is not easy to control due to current mismatch in process variation

Method used

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  • Low Dropout Regulator Based on Subthreshold Region
  • Low Dropout Regulator Based on Subthreshold Region

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Embodiment Construction

[0026] The term "coupled (or connected)" as used throughout the specification of this application (including the claims) may refer to any direct or indirect means of connection. For example, if it is described in the text that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or indirectly connected to the second device by a connecting means. Terms such as "first" and "second" mentioned in the whole specification of this application (including the claims) are used to name elements or to distinguish different embodiments or scopes, but are not used to limit The upper or lower limit of the number of components is not intended to limit the order of the components. Additionally, where possible, components / components / steps using the same reference numbers in the drawings and the detailed descriptio...

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Abstract

A low dropout voltage regulator is configured to generate a low dropout voltage. The low dropout voltage regulator includes at least one current mirror and at least one resistor. The at least one current mirror operates in a subthreshold region. A first end of the at least one resistor is directly coupled to the at least one current mirror. The second end of the at least one resistor is directly coupled to the power line.

Description

【Technical field】 [0001] The present invention relates to a voltage generating circuit, and more particularly, to a low dropout (LDO) voltage regulator based on a subthreshold region. 【Background technique】 [0002] A low-dropout regulator (LDO regulator) is a commonly used power management circuit for regulating a regulated voltage source (ie, independent of output load, input voltage and temperature). A basic low dropout voltage regulator consists of a bandgap voltage generator, an error amplifier and a power transistor. In order to achieve ultra-low quiescent current, sub-threshold technology is applied to low dropout voltage regulators. However, the sub-threshold region is not easily controlled due to current mismatch in process variation. [0003] It should be noted that the content of the "Background Art" paragraph is used to assist the understanding of the present invention. Some (or all) of the content disclosed in the "Background Art" paragraph may not be known i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCG05F3/262
Inventor 刘宇轩
Owner HIMAX TECH LTD
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