A low-dropout linear regulator and a DC regulated power supply

A low-dropout linear, voltage-stabilizer technology, applied in instruments, regulating electrical variables, control/regulating systems, etc., can solve the problems of long transient response time, inability to obtain output voltage quickly, and achieve accelerated voltage error changes, The effect of shortening the transient response time and keeping the output voltage stable

Active Publication Date: 2022-07-15
AUTOCHIPS WUHAN CO LTD
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Problems solved by technology

[0003] The inventors of the present invention found in the long-term research and development that the low dropout linear voltage regulator is used to provide a stable voltage source for the power supply terminal of the chip, but because the input terminal of the low dropout linear voltage regulator will produce current changes, the low dropout linear voltage regulator The output of the transformer produces voltage transient response changes, and the transient response time is long, so it is impossible to quickly obtain a stable output voltage

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  • A low-dropout linear regulator and a DC regulated power supply
  • A low-dropout linear regulator and a DC regulated power supply
  • A low-dropout linear regulator and a DC regulated power supply

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Embodiment Construction

[0012] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0013] see figure 1 , figure 1 It is a schematic structural diagram of an embodiment of the low dropout linear regulator provided by the present invention. The low dropout linear regulator includes a voltage input terminal Vin, an error amplifying unit 11, a channel unit 12, a feedback unit 13 and a voltage output terminal Vout.

[0014] The voltage input terminal Vin is used for receiving an input voltage, which can be a DC voltage; the voltage ...

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Abstract

The invention discloses a low-dropout linear voltage stabilizer and a stabilized power supply. The voltage stabilizer includes a voltage input end, an error amplifying unit, a channel unit, a feedback unit and a voltage output end. The first input end of the error amplifying unit is used for The first reference voltage is received, and the second input terminal is used for receiving the first feedback voltage that changes with the output voltage, and amplifies the voltage error between the first input terminal and the second input terminal to output the driving signal; The connection end is connected to the voltage input end, the second connection end is connected to the voltage output end, the control end is connected to the output end of the error amplifying unit, and the voltage difference between the input voltage and the output voltage is adjusted according to the driving signal; The first input terminal provides a second feedback voltage that changes with the output voltage, and the changing trends of the first feedback voltage and the second feedback voltage with the output voltage are opposite to each other. In the above manner, the present invention can speed up the transient response.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a low-dropout linear voltage stabilizer and a DC voltage stabilized power supply. Background technique [0002] Because Low Dropout Regulator (LDO, Low Dropout Regulator) has the characteristics of good output voltage ripple, good power supply rejection ratio and low noise, it can provide stable output voltage, so RF circuits generally use LDO to supply power , is widely used in various portable electronic products. [0003] The inventor of the present invention found in the long-term research and development that the low dropout linear voltage regulator is used to provide a stable voltage source to the power supply terminal of the chip. The output of the voltage transformer produces voltage transient response changes, the transient response time is long, and a stable output voltage cannot be obtained quickly. SUMMARY OF THE INVENTION [0004] The main problem to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/575G05F1/46
CPCG05F1/575G05F1/461
Inventor 陈盈吉
Owner AUTOCHIPS WUHAN CO LTD
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