Low dropout linear regulator with fast transient response

A low-dropout linear and transient response technology, which is applied in the direction of instruments, electric variable adjustment, control/regulation systems, etc., can solve problems such as difficulty in meeting design requirements, deterioration of LDO load transient response, and increased power consumption to achieve enhanced Effects of load transient response, load transient response performance improvement, and loop stability improvement

Pending Publication Date: 2019-01-08
上海海栎创科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the level of circuit integration continues to increase and the power consumption increases, further deteriorating the load transient response of the LDO
The traditional

Method used

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  • Low dropout linear regulator with fast transient response
  • Low dropout linear regulator with fast transient response
  • Low dropout linear regulator with fast transient response

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Embodiment Construction

[0020] Hereinafter, embodiments of the invention will be described in detail, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents coming within the spirit and scope of the appended claims.

[0021] The present invention provides a low-dropout linear regulator with fast transient response, and the present invention will be further described in detail below in conjunction with the accompanying drawings:

[0022] Such as figure 1 As shown, the inventor has studied a typical low-dropout linear regulator, which includes a reference voltage circuit, an error amplifier, a series regulator MP0, and a resistance feedback network composed of resistors R1 and R2, where CL is the output load c...

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Abstract

The invention belongs to the field of integrated circuit design, in particular to a low dropout linear regulator with fast transient response. The regulator comprises a reference voltage source, an error amplifier, a series adjustment tube MNO, and a resistor feedback network composed of a first resistor R1 and a second resistor R2, wherein the regulator further comprises a buffer connected between an output end of the error amplifier and a gate end of the series adjustment tube MNO, a load transient response enhancement circuit connected between a gate end and a source end of the series adjustment tube MNO, an adaptive compensation control circuit connected between the error amplifier and the load transient response enhancement circuit, and a bias circuit that provides an operating current. Since the adaptive zero compensation improves the loop stability of the regulator, the NMOS series adjustment tube and the load transient response enhancement circuit enhance the load transient response of the regulator, the low dropout linear regulator with fast transient response achieves an improvement in load transient response performance of the low dropout linear regulator in the case ofhaving no off-chip capacitance and no significant increase in static power consumption.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, in particular to a low-dropout linear regulator with fast transient response. Background technique [0002] Low dropout linear regulator (LDO) is widely used in SoC design because of its simple structure, low power consumption, small output ripple, and few peripheral components to supply power to different functional modules. Such as figure 1 As shown, a typical low-dropout linear regulator is generally composed of a reference voltage circuit, an error amplifier, a resistor feedback network composed of a series regulator MP0 and resistors R1 and R2, where C L is the output load capacitance, I L is the output load current. [0003] With the advancement of semiconductor manufacturing technology, the power supply voltage of digital integrated circuits has been continuously reduced, and the requirements for the transient response of the LDO power supply for it have increased accordingly. ...

Claims

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Application Information

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IPC IPC(8): G05F1/46G05F1/575
CPCG05F1/461G05F1/575
Inventor 卢昌鹏刘华
Owner 上海海栎创科技股份有限公司
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