CN116978904B - Power supply voltage stabilizing circuit and integrated chip - Google Patents
Power supply voltage stabilizing circuit and integrated chip Download PDFInfo
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- CN116978904B CN116978904B CN202310931757.1A CN202310931757A CN116978904B CN 116978904 B CN116978904 B CN 116978904B CN 202310931757 A CN202310931757 A CN 202310931757A CN 116978904 B CN116978904 B CN 116978904B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
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Abstract
The invention discloses a power supply voltage stabilizing circuit and an integrated chip, which comprise a starting circuit, a feedback circuit, a voltage stabilizing sub-circuit and an amplifying and shunting circuit which are connected in sequence, wherein the starting circuit is used for determining whether to start the power supply voltage stabilizing circuit according to an undervoltage protection signal, the feedback circuit is used for adjusting current flowing through the voltage stabilizing sub-circuit and the amplifying and shunting circuit, and the voltage stabilizing sub-circuit is used for adjusting current flowing through the amplifying and shunting circuit so as to realize voltage stabilization. The invention divides the current through the setting circuit, reduces the current flowing through the voltage stabilizing tube, forms negative feedback, reduces the current of the feedback circuit and the voltage stabilizing sub-circuit, reduces the burning probability of the voltage stabilizing tube, reduces the chip area and saves the cost.
Description
Technical Field
The present invention relates to the field of integrated circuits, and in particular, to a power supply voltage stabilizing circuit and an integrated chip.
Background
The power supply is used as a main input end of the chip and is important for the normal operation of the chip. At the moment of starting the chip, an overshoot voltage is generated, and the overshoot voltage can damage devices in the chip, so that the normal use of the chip is seriously affected.
In order to ensure the stability of the power supply in the chip, a power supply voltage stabilizing circuit needs to be integrated in the chip, the power supply voltage stabilizing circuit is realized by connecting voltage stabilizing tubes in series, three voltage stabilizing tubes in series are most common, as shown in fig. 1, when the power supply voltage is greater than the breakdown voltage of the three voltage stabilizing tubes in series, the input power supply is clamped, the three voltage stabilizing tubes are all conducted, the power supply current discharges through the voltage stabilizing tubes, but as the input power supply voltage increases, the power supply is clamped, the current flowing through the three voltage stabilizing tubes gradually increases, and the clamping voltage also increases, so that the required voltage stabilizing value is changed. In order to solve the problem that the discharge capacity is not strong and prevent the voltage stabilizing tube from burning out, the voltage stabilizing tube with a large layout area is needed to be adopted for implementation, the integrated circuit structure is shown in fig. 2, the chip area is wasted, the voltage stabilizing value is not stable enough, the power supply voltage stabilizing value is inconvenient to adjust, the discharge effect is not ideal, and the chip cost is increased.
In order to reduce the cost of a chip, improve the voltage stabilizing effect and enhance the discharging capability of the power supply voltage stabilizing, designing a power supply voltage stabilizing circuit is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a power supply voltage stabilizing circuit and an integrated chip, wherein a starting circuit is adopted to protect current at the beginning of power-on, a feedback circuit is adopted to control the size of shunt current, a voltage stabilizing sub-circuit is adopted to set a voltage stabilizing value, the shunt size of an amplifying shunt circuit is dynamically controlled according to the amount of the power supply voltage larger than the voltage stabilizing value, when the power supply voltage is larger than a voltage set value, the current flowing through a voltage stabilizing tube is reduced through the shunt of the amplifying shunt circuit, the burning probability of the voltage stabilizing tube is reduced, the discharging capability is improved, the amplifying shunt circuit is adopted to replace a large-current voltage stabilizing tube, the area of the chip is reduced, and the cost is saved.
In a first aspect, the above object of the present invention is achieved by the following technical solutions:
the utility model provides a power voltage stabilizing circuit, includes starting circuit, feedback circuit, steady voltage sub-circuit, the amplifying shunt circuit that connects gradually, and starting circuit is used for deciding whether to start power voltage stabilizing circuit according to undervoltage protection signal, and feedback circuit is used for adjusting the electric current that flows through steady voltage sub-circuit, amplifying shunt circuit, and steady voltage sub-circuit is used for adjusting the electric current that flows through amplifying shunt circuit, realizes the steady voltage.
The invention is further provided with: one end of the starting circuit, one end of the feedback circuit, one end of the voltage stabilizing sub-circuit and one end of the amplifying and shunting circuit are connected with the positive power supply, the other end of the starting circuit, one end of the voltage stabilizing sub-circuit and the other end of the amplifying and shunting circuit are grounded, the output of the starting circuit is connected with the control end of the feedback circuit, the output of the feedback circuit is connected with the input end of the voltage stabilizing sub-circuit, and the output end of the voltage stabilizing sub-circuit is connected with the control end of the amplifying and shunting circuit and used for controlling the current flowing through the amplifying and shunting circuit.
The invention is further provided with: the starting circuit comprises a starting control circuit and a first voltage dividing circuit, wherein the control end of the starting control circuit is connected with the output end of the undervoltage protection signal, the input end of the starting control circuit is connected with the positive power supply, the output end of the starting control circuit is connected with one end of the first voltage dividing circuit, the output end of the first voltage dividing circuit is connected with the control end of the feedback circuit, and the other end of the first voltage dividing circuit is grounded.
The invention is further provided with: the feedback circuit comprises a first current control circuit for determining the magnitude of the current flowing through the feedback circuit according to the output magnitude of the starting circuit.
The invention is further provided with: the voltage stabilizing sub-circuit comprises a first voltage stabilizing unit, a second voltage stabilizing unit and a voltage regulating circuit which are connected in series, wherein the first voltage stabilizing unit and the second voltage stabilizing unit are used for setting the voltage stabilizing voltage, the serial points of the first voltage stabilizing unit and the second voltage stabilizing unit are connected with the output of the feedback circuit, the voltage regulating circuit is used for regulating the output voltage according to the current flowing through the second voltage stabilizing unit, and the serial points of the second voltage stabilizing unit and the voltage regulating circuit are used as the output end of the voltage stabilizing sub-circuit.
The invention is further provided with: the first voltage stabilizing unit comprises a first voltage stabilizing tube, the second voltage stabilizing unit comprises a second voltage stabilizing tube, and the magnitude of current flowing through the second voltage stabilizing unit determines the output magnitude of the voltage stabilizing sub-circuit.
The invention is further provided with: the first voltage stabilizing unit comprises a third voltage stabilizing tube and a fourth voltage stabilizing tube which are connected in series and used for increasing the voltage stabilizing value of the first voltage stabilizing unit.
The invention is further provided with: the amplifying and shunting circuit comprises a second current control circuit which is used for determining the current flowing through the amplifying and shunting circuit according to the output size of the voltage stabilizing sub-circuit.
The invention is further provided with: the second current control circuit comprises a current amplifying unit and a current splitting unit which are connected in series, the current of the current amplifying unit is controlled according to the output of the voltage stabilizing sub-circuit, and the current of the current splitting unit is controlled according to the current of the current amplifying unit.
In a second aspect, the above object of the present invention is achieved by the following technical solutions:
the utility model provides an integrated chip with power voltage stabilizing circuit, integrated chip includes power pin and ground pin, integrated in the integrated chip has this application power voltage stabilizing circuit, power voltage stabilizing circuit's power termination power pin, power voltage stabilizing circuit's ground pin, power voltage stabilizing circuit is used for carrying out the steady voltage to the power in the integrated chip according to external power supply's size.
Compared with the prior art, the beneficial technical effects of this application are:
1. the current flowing through the voltage stabilizing tube is reduced by arranging the circuit for shunting, the burning probability of the voltage stabilizing tube is reduced, the area of a chip is reduced, and the cost is saved;
2. further, negative feedback is realized through the feedback circuit, the voltage stabilizer circuit and the amplifying and shunting circuit, and the stability of the power supply voltage is ensured;
3. further, negative feedback is formed through the voltage stabilizing sub-circuit and the amplifying and shunting circuit, so that the stability of the power supply voltage is further ensured.
Drawings
FIG. 1 is a schematic diagram of a prior art voltage stabilizing circuit;
FIG. 2 is a schematic diagram of a prior art chip structure with a voltage regulator circuit;
FIG. 3 is a schematic diagram of a power supply voltage stabilizing circuit according to one embodiment of the present application;
FIG. 4 is a schematic diagram of a start-up circuit according to one embodiment of the present application;
FIG. 5 is a schematic diagram of a voltage stabilizing sub-circuit according to one embodiment of the present application;
FIG. 6 is a schematic diagram of a power supply voltage regulator circuit according to one embodiment of the present application;
FIG. 7 is a schematic diagram of a chip with a voltage regulator circuit according to one embodiment of the present application;
fig. 8 is a graph comparing the voltage stabilizing effect of the voltage stabilizing circuit of the present application with that of the prior art voltage stabilizing circuit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides a power supply voltage stabilizing circuit, as shown in figure 3, including the start-up circuit that connects gradually, feedback circuit, the steady voltage sub-circuit, amplify the shunt circuit, the one end of start-up circuit, the one end of feedback circuit, the one end of steady voltage sub-circuit, amplify the one end of shunt circuit and connect the power VCC end, the other end of start-up circuit, the other end of steady voltage sub-circuit, amplify the other end of shunt circuit and connect power ground GND, the input of start-up circuit connects undervoltage protection signal A1 output, its output is connected to feedback circuit's input, feedback circuit's output is connected to steady voltage sub-circuit input, steady voltage sub-circuit output is connected to amplify the input of shunt circuit.
The starting circuit outputs a feedback signal A2 according to the undervoltage protection signal A1, the feedback circuit outputs a voltage stabilizing signal A3 according to the feedback signal A2, the voltage stabilizing sub-circuit outputs a shunt signal A4 according to the voltage stabilizing signal A3, and the amplifying shunt circuit adjusts the shunt current according to the shunt signal A4.
In a specific embodiment of the present application, when the power supply voltage rises, the voltage value of the power supply voltage is greater than the undervoltage protection value, the undervoltage protection signal A1 is effective, the starting circuit outputs the feedback signal A2, the magnitude of the feedback signal A2 is proportional to the power supply voltage, when the magnitude of the feedback signal A2 reaches the first set value, the feedback circuit works to output the feedback signal A2, the magnitude of the feedback signal A2 determines the magnitude of the voltage stabilizing signal A3 output by the feedback circuit, and the magnitude of the voltage stabilizing signal A3 determines the magnitude of the current flowing through the amplifying and shunting circuit, and when the current flowing through the amplifying and shunting circuit increases, the current flowing through the voltage stabilizing sub-circuit is reduced.
When the power supply voltage rises to be greater than the set value of the voltage stabilizing sub-circuit, the voltage stabilizing sub-circuit works, the power supply voltage continues to rise, the current flowing through the voltage stabilizing sub-circuit increases, the size of an output shunt signal A4 of the voltage stabilizing sub-circuit also increases, and the amplifying shunt circuit increases the shunt circuit due to the increase of the shunt signal A4, so that the current flowing through the voltage stabilizing sub-circuit is reduced, and negative feedback is formed.
As shown in fig. 4, the starting circuit includes a starting control circuit and a first voltage dividing circuit which are sequentially connected, one end of the starting control circuit is connected with a power VCC, the other end is connected with the first voltage dividing circuit, the control end is connected with the input end of the undervoltage protection signal A1, the other end of the first voltage dividing circuit is connected with a power ground GND, and the output end is connected with a feedback circuit.
When the undervoltage protection signal A1 is effective, the starting control circuit is conducted, the first voltage dividing circuit divides the voltage of the power supply VCC and outputs the divided voltage to the feedback circuit, and the feedback circuit divides the power supply according to the magnitude of the feedback signal A2; when the undervoltage protection signal A1 is invalid, the starting control circuit is cut off and no feedback signal is output when the power supply voltage is smaller than the undervoltage protection value, and the feedback circuit does not work.
The feedback circuit comprises a first current control circuit, which is used for determining the current flowing through the feedback circuit according to the feedback signal of the output of the starting circuit and also determining the current of the output voltage stabilizing signal A3.
As shown in fig. 5, the voltage stabilizing sub-circuit includes a first voltage stabilizing unit, a second voltage stabilizing unit and a voltage regulating circuit connected in series, one end of the first voltage stabilizing unit is connected with a power VCC, a series point of the first voltage stabilizing unit and the second voltage stabilizing unit is connected with an output end of the feedback circuit, a series point of the second voltage stabilizing unit and the voltage regulating circuit is connected with an input end of the amplifying shunt circuit, and the other end of the voltage regulating circuit is connected with GND.
When the voltage of the power supply VCC is larger than the voltage stabilizing values of the first voltage stabilizing unit and the second voltage stabilizing unit, current flows through the first voltage stabilizing unit and the second voltage stabilizing unit, a shunt signal A4 is output at one end of the voltage regulating circuit, and the larger the voltage value of the power supply VCC is, the larger the current flowing through the voltage stabilizing sub-circuit is, and the larger the shunt signal A4 is.
The first voltage stabilizing unit comprises at least one voltage stabilizing tube according to the magnitude of the voltage stabilizing value, and the second voltage stabilizing unit comprises at least one voltage stabilizing tube according to the magnitude of the voltage stabilizing value, and the voltage stabilizing tubes are connected in series so as to improve the voltage stabilizing value.
The amplifying and shunting circuit comprises a second current control circuit, and the current flowing through the amplifying and shunting circuit is determined according to the magnitude of a shunting signal A4 output by the voltage stabilizing sub-circuit.
In a specific embodiment of the present application, the second current control circuit includes a current shunt unit, and the shunt unit adjusts the magnitude of the current flowing through the amplifying shunt circuit according to the magnitude of the shunt signal A4.
In yet another specific embodiment of the present application, the second current control circuit includes a current amplifying unit and a current splitting unit, where the current amplifying unit amplifies the split signal A4 and then controls the current of the current splitting unit.
As shown in fig. 6, the start-up control circuit includes a PMOS transistor P1, the first voltage dividing circuit includes a first resistor R1 and a second resistor R2 connected in series, the input end of the PMOS transistor P1 is connected to a power VCC, the output end of the first resistor is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to GND, the control end of the PMOS transistor P1 is connected to the input of an undervoltage protection signal A1, the undervoltage protection signal A1 determines whether the PMOS transistor P1 is turned on, and the power voltage stabilizing circuit works.
The first current control circuit comprises an NPN triode Q1, the base electrode of the triode Q1 is connected with the serial connection point of the first resistor R1 and the second resistor R2, the input end of the triode Q is connected with a power supply VCC, and the output end of the triode Q is connected with the input end of the voltage stabilizing sub-circuit.
The voltage stabilizing sub-circuit comprises a third voltage stabilizing tube D3, a fourth voltage stabilizing tube D4, a fifth voltage stabilizing tube D5 and a third resistor R3 which are connected in series. The first voltage stabilizing unit comprises a third voltage stabilizing tube D3 and a fourth voltage stabilizing tube D4 which are connected in series, the second voltage stabilizing unit comprises a fifth voltage stabilizing tube D5, and the voltage regulating circuit comprises a third resistor R3. The output end of the first current control circuit is connected to the serial connection point of the first voltage stabilizing unit and the second voltage stabilizing unit, and the serial connection point of the second voltage stabilizing unit and the voltage regulating circuit is used as the output of the voltage stabilizing sub-circuit and is connected to the input end of the amplifying and shunting circuit.
The current amplifying circuit comprises an NPN triode Q2 and a fourth resistor R4, wherein the collector electrode of the triode Q2 is connected with a power supply VCC, the base electrode of the triode Q is connected with the voltage stabilizing sub-circuit, the emitter electrode of the triode Q is connected with one end of the fourth resistor R4, and the other end of the fourth resistor R4 is grounded.
The current splitting unit comprises an NPN triode Q3, the collector of the triode Q2 is connected with a power supply VCC, the base of the triode Q is connected with the emitter of the triode Q2, and the emitter of the triode Q is grounded.
The working principle of the circuit is as follows:
when the power supply voltage VCC is smaller than the undervoltage protection value, the undervoltage protection signal A1 is invalid, the P1 tube is cut off, the base electrode of the triode Q1 is not voltage, the triode Q1 is not conducted, each voltage stabilizing tube in the voltage stabilizing sub-circuit is not conducted, the voltage stabilizing sub-circuit is not operated, and the triodes Q2 and Q3 are not operated.
When the power supply voltage VCC is larger than or equal to the undervoltage protection value, the undervoltage protection signal A1 is effective, the P1 tube is conducted, the power supply voltage VCC is divided by the resistor R1/R2 to provide voltage for the base electrode of the triode Q1, when the base electrode voltage is larger than the conducting voltage of the triode Q1, the triode Q1 is conducted to provide current for the voltage stabilizing tube D5, when the voltage of the emitting electrode of the triode Q1 is larger than the sum of the voltage on the voltage stabilizing tube D5 and the voltage on the third resistor R3, the voltage stabilizing tube D5 breaks down, current flows through the collector electrode, the emitting electrode and the voltage stabilizing tube D5 of the triode Q1 and the third resistor R3, and the voltage is output on the third resistor R3.
When the power supply voltage VCC continues to rise and is larger than the total voltage stabilizing value of the three series voltage stabilizing tubes and the voltage on the third resistor R3, all the three voltage stabilizing tubes D3/D4/D5 break down, current flows, the voltage A4 on the third resistor R3 enables the triode Q2 to be micro-conductive, the power supply voltage VCC continues to increase, and the triode Q3 is micro-conductive after the triode Q2 is micro-conductive.
When the power supply voltage VCC continues to be increased to a set value, the power supply voltage stabilizing circuit reaches a voltage stabilizing value, the current flowing through the three voltage stabilizing tubes D3/D4/D5 is increased, the voltage A4 on the third resistor R3 is increased, the current is amplified by the triode Q2, and the current flowing through the collector of the triode Q3 is increased, so that the current flowing through the three voltage stabilizing tubes in series connection is reduced, and a negative feedback process is formed.
Meanwhile, due to the increase of the power supply voltage, the base voltage of the triode Q1 is increased, the current flowing through the collector of the triode Q1 is correspondingly increased, the voltage A4 on the third resistor R3 is improved, the current flowing through the collector of the triode Q3 is increased, the current flowing through three series voltage stabilizing tubes is reduced, and the stability of the power supply voltage is further ensured by overlapping negative feedback.
The voltage stabilizing value of the power supply can be reduced by adjusting the resistance values of the first resistor R1 and the second resistor R2.
After the resistance values of the first resistor R1 and the second resistor R2 are selected, the base voltage V1 of the triode Q1 can easily reach the on-voltage value, such as 8V, or is not easy to reach the on-voltage value when different power voltages are applied.
For example, the values of the first resistor R1 and the second resistor R2 are adjusted to be the first set of resistance values, and when V1 reaches 8V, the power supply voltage is stabilized at 15V.
And adjusting the values of the first resistor R1 and the second resistor R2 to be a second group of resistance values, and when the V1 reaches 8V, stabilizing the power supply voltage at 14V.
Here, the first set of resistance values includes a resistance value of the first resistor R1 and a resistance value of the second resistor R2, and similarly, the second set of resistance values includes a resistance value of the first resistor R1 and a resistance value of the second resistor R2, and each set of resistance values is different, so that the base voltage V1 of the triode Q1 can reach a conducting value when different power supply voltages are applied.
By changing the resistance values of the first resistor R1 and the second resistor R2, when the power supply voltage does not reach the voltage stabilizing value of the voltage stabilizing sub-circuit yet, the triode Q1 is conducted to work, the voltage stabilizing tube D5 breaks down, so that the triode Q2/Q3 is micro-conducted, when the power supply voltage continues to increase, the voltage reaches to be stabilized, the current flowing through the collector of the triode Q1 increases, the voltage on the third resistor R3 increases, the current flowing through the pole of the triode Q2 increases, the current flowing through the collector of the triode Q2 is further amplified through the amplification of the triode Q2, the voltage on the fourth resistor R4 is improved, the current flowing through the collector of the triode Q3 is amplified again, accordingly, the current flowing through the collector of the triode Q1 is reduced, negative feedback is formed, and the stability of the power supply voltage is ensured.
The power supply voltage stabilizing circuit is integrated in an IC to perform power supply voltage stabilization of the integrated IC, as shown in FIG. 7, a power supply VCC of the power supply voltage stabilizing circuit is connected with a power supply pin VCC2 of the integrated IC, a GND (ground) of the power supply voltage stabilizing circuit is connected with a power supply ground pin of the integrated IC, and when the integrated IC works, a current pin of the integrated IC is connected with an external power supply HV through a fifth resistor R5, and the fifth resistor R5 is used for limiting and dividing the external power supply HV.
The utility model provides a power supply voltage stabilizing circuit, its steady voltage effect diagram is as shown in fig. 8, in the figure VCC1 represents prior art, adopts the steady voltage effect of three regulator tube series connection, and VCC2 represents the steady voltage effect after adopting the power supply voltage stabilizing circuit of this application, obviously sees, along with external power supply voltage's increase, and the integrated IC steady voltage effect of this application is obvious.
The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes according to the principles of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a power voltage stabilizing circuit which characterized in that: the power supply voltage stabilizing circuit comprises a starting circuit, a feedback circuit, a voltage stabilizer circuit and an amplifying and shunting circuit which are sequentially connected, wherein the starting circuit is used for determining whether to start the power supply voltage stabilizing circuit according to an under-voltage protection signal, the feedback circuit is used for adjusting current flowing through the voltage stabilizer circuit and the amplifying and shunting circuit, and the voltage stabilizer circuit is used for adjusting current flowing through the amplifying and shunting circuit to realize voltage stabilization.
2. A power supply voltage stabilizing circuit according to claim 1, wherein: one end of the starting circuit, one end of the feedback circuit, one end of the voltage stabilizing sub-circuit and one end of the amplifying and shunting circuit are connected with the positive power supply, the other end of the starting circuit, one end of the voltage stabilizing sub-circuit and the other end of the amplifying and shunting circuit are grounded, the output of the starting circuit is connected with the control end of the feedback circuit, the output of the feedback circuit is connected with the input end of the voltage stabilizing sub-circuit, and the output end of the voltage stabilizing sub-circuit is connected with the control end of the amplifying and shunting circuit and used for controlling the current flowing through the amplifying and shunting circuit.
3. A power supply voltage stabilizing circuit according to claim 1, wherein: the starting circuit comprises a starting control circuit and a first voltage dividing circuit, wherein the control end of the starting control circuit is connected with the output end of the undervoltage protection signal, the input end of the starting control circuit is connected with the positive power supply, the output end of the starting control circuit is connected with one end of the first voltage dividing circuit, the output end of the first voltage dividing circuit is connected with the control end of the feedback circuit, and the other end of the first voltage dividing circuit is grounded.
4. A power supply voltage stabilizing circuit according to claim 1, wherein: the feedback circuit comprises a first current control circuit for determining the magnitude of the current flowing through the feedback circuit according to the output magnitude of the starting circuit.
5. A power supply voltage stabilizing circuit according to claim 1, wherein: the voltage stabilizing sub-circuit comprises a first voltage stabilizing unit, a second voltage stabilizing unit and a voltage regulating circuit which are connected in series, wherein the first voltage stabilizing unit and the second voltage stabilizing unit are used for setting the voltage stabilizing voltage, the serial points of the first voltage stabilizing unit and the second voltage stabilizing unit are connected with the output of the feedback circuit, the voltage regulating circuit is used for regulating the output voltage according to the current flowing through the second voltage stabilizing unit, and the serial points of the second voltage stabilizing unit and the voltage regulating circuit are used as the output end of the voltage stabilizing sub-circuit.
6. The power supply voltage regulator circuit of claim 5, wherein: the first voltage stabilizing unit comprises at least one voltage stabilizing tube, the second voltage stabilizing unit comprises at least one voltage stabilizing tube, and the magnitude of current flowing through the second voltage stabilizing unit determines the output magnitude of the voltage stabilizing sub-circuit.
7. The power supply voltage regulator circuit of claim 5, wherein: the first voltage stabilizing unit comprises a third voltage stabilizing tube and a fourth voltage stabilizing tube which are connected in series and used for increasing the voltage stabilizing value of the first voltage stabilizing unit.
8. A power supply voltage stabilizing circuit according to claim 1, wherein: the amplifying and shunting circuit comprises a second current control circuit which is used for determining the current flowing through the amplifying and shunting circuit according to the output size of the voltage stabilizing sub-circuit.
9. The power supply voltage regulator circuit of claim 8, wherein: the second current control circuit comprises a current amplifying unit and a current splitting unit which are connected in series, the current of the current amplifying unit is controlled according to the output of the voltage stabilizing sub-circuit, and the current of the current splitting unit is controlled according to the current of the current amplifying unit.
10. An integrated chip with a power supply voltage stabilizing circuit, characterized in that: the integrated chip comprises a power supply pin and a ground pin, the power supply voltage stabilizing circuit as claimed in any one of claims 1-9 is integrated in the integrated chip, the power supply of the power supply voltage stabilizing circuit is connected with the power supply pin, the ground of the power supply voltage stabilizing circuit is connected with the ground pin, and the power supply voltage stabilizing circuit is used for stabilizing the power supply in the integrated chip according to the size of an external power supply.
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| CN202310931757.1A CN116978904B (en) | 2023-07-27 | 2023-07-27 | Power supply voltage stabilizing circuit and integrated chip |
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| CN202310931757.1A CN116978904B (en) | 2023-07-27 | 2023-07-27 | Power supply voltage stabilizing circuit and integrated chip |
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| CN116978904B true CN116978904B (en) | 2024-02-23 |
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| CN113885636A (en) * | 2021-11-05 | 2022-01-04 | 安徽海勤科技有限公司 | Input voltage range adjustable protection circuit |
| CN217183181U (en) * | 2022-01-14 | 2022-08-12 | 诺博汽车科技有限公司 | Constant voltage power supply circuit |
| CN217406185U (en) * | 2022-03-25 | 2022-09-09 | 阳光电源股份有限公司 | Power protection circuit and power circuit |
| CN115756081A (en) * | 2022-12-07 | 2023-03-07 | 无锡中微爱芯电子有限公司 | Voltage stabilizing circuit based on current feedback |
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| CN110265975A (en) * | 2019-05-09 | 2019-09-20 | 四川莱福德科技有限公司 | IC chip protects circuit |
| CN112260229A (en) * | 2020-12-23 | 2021-01-22 | 上海芯龙半导体技术股份有限公司南京分公司 | Power chip circuit |
| CN113885636A (en) * | 2021-11-05 | 2022-01-04 | 安徽海勤科技有限公司 | Input voltage range adjustable protection circuit |
| CN217183181U (en) * | 2022-01-14 | 2022-08-12 | 诺博汽车科技有限公司 | Constant voltage power supply circuit |
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| CN116978904A (en) | 2023-10-31 |
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