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Low-pressure difference voltage stabilizer and flash memory

A low-dropout voltage regulator and error amplifier technology, applied in the field of transformer parts, to achieve good stability

Pending Publication Date: 2018-09-04
YANGTZE MEMORY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the dominant pole of the nested Miller compensation is usually closer to the origin, it is impossible to further move the dominant pole toward the origin in order to satisfy the stability under the conditions of large load capacitance and light load.

Method used

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  • Low-pressure difference voltage stabilizer and flash memory
  • Low-pressure difference voltage stabilizer and flash memory
  • Low-pressure difference voltage stabilizer and flash memory

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Embodiment Construction

[0030] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0032] As indicated in this application and claims, the terms "a", "an", "an" and / or "the" do not refer to the singular and may include the plural unless the context clearly indicates an exception. Generally speaking, the terms "comprising" and "comprising" only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also contain other st...

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Abstract

The invention provides a low-pressure difference voltage stabilizer and a flash memory. The low-pressure difference voltage stabilizer comprises a first-grade error amplifier, a power tube, a first Miller capacitor and a load detection circuit, wherein the power tube is connected with the first-grade error amplifier and suitable for outputting an adjusted output signal applied on load; the first Miller capacitor is arranged between an output end of the first-grade error amplifier and an output end of the power tube; the load detection circuit is suitable for generating a control signal according to a current load situation of the load; the first-grade error amplifier comprises a gain adjusting unit used for positively adjusting the gain of the first-grade error amplifier according to the control signal. The low-pressure difference voltage stabilizer has good stability when being no-load or light-load.

Description

technical field [0001] The present invention mainly relates to transformer parts, in particular to a low-dropout voltage stabilizer. Background technique [0002] Existing low-dropout regulators (LDO for short) mostly adopt a three-stage amplifier structure in order to achieve high gain and good load modulation, which requires multi-stage Miller compensation. A common one is nested Miller compensation, which achieves stabilization by separating the primary and secondary poles. However, since the dominant pole of the nested Miller compensation is usually closer to the origin, it is impossible to further move the dominant pole toward the origin in order to satisfy the stability under the conditions of large load capacitance and light load. Therefore, when the LDO is unloaded or lightly loaded (for example, less than 1mA), and the load capacitance is large (for example, greater than 1nf), the stability of the LDO is a research hotspot. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56G11C5/14G11C16/34
CPCG05F1/561G11C5/147G11C16/34
Inventor 万金梅曾子玉
Owner YANGTZE MEMORY TECH CO LTD
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