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A low-dropout linear regulator ldo power-up circuit

A low-dropout linear and voltage stabilizer technology, applied in the direction of instruments, adjusting electrical variables, control/regulation systems, etc., to achieve high pressure bearing capacity, prevent overshoot voltage from destroying circuits, and delay power-on time

Active Publication Date: 2021-12-10
芯灵通天津科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention aims to propose a high-voltage-resistant low-dropout linear regulator LDO and its power-on circuit, to solve the problem of reliability of the low-dropout linear regulator LDO working under high voltage by adopting a low-voltage process design and manufacture. question

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  • A low-dropout linear regulator ldo power-up circuit
  • A low-dropout linear regulator ldo power-up circuit

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Embodiment Construction

[0028]It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood a...

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Abstract

The invention provides a high-voltage resistant LDO and its power-on circuit. The current mirror bias sub-circuit, error amplifier, power stage and its feedback sub-circuit are all connected with the electronic circuit on the LDO. The electronic circuit on the LDO is used to protect the current mirror bias The subcircuit, error amplifier, power stage and its feedback subcircuit; the current mirror bias subcircuit is connected with the error amplifier, the error amplifier is connected with the power stage and its feedback subcircuit, and the current mirror bias subcircuit is used to provide the error amplifier with The bias voltage, power stage and its feedback subcircuit are used to provide regulation and protection for the error amplifier. The high-voltage resistant LDO and its power-on circuit described in the present invention can effectively solve the reliability problem of the LDO designed and manufactured by low-voltage technology and working under high voltage. And by replacing only the key part of the LDO with a high-pressure tube, the rest is still designed with a common tube, which alleviates the performance and area disadvantages brought by the high-pressure tube to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of amplifier circuits, in particular to an LDO power-on circuit for a low-dropout linear regulator. Background technique [0002] With the advancement of process nodes, the withstand voltage value of circuit devices generally decreases. In order to save costs, SoCs are usually designed using the same process, so it is even more necessary to convert high input voltages into low voltages to supply power to subsequent circuit modules. [0003] Low dropout linear regulator (LDO) has the advantages of low output noise, simple circuit structure and small area. In particular, the LDO with no external capacitor structure has fewer peripheral components, so it is widely used in SoCs. However, when the LDO designed with the same low-voltage process as the system-on-chip works at high voltage, it also has the risk of breakdown, and its reliability is low. [0004] In order to overcome the above problems, it is usual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/571G05F1/56
CPCG05F1/571G05F1/56
Inventor 史昕宇吴昊傅海鹏
Owner 芯灵通天津科技有限公司
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