Linear voltage regulator circuits, chips and electronic devices

Abstract

Embodiments of the present disclosure provide a linear voltage regulator circuit, a chip, and an electronic device. The linear voltage regulator circuit includes a positive temperature coefficient voltage generating circuit, a first transistor, and a negative feedback circuit. The positive temperature coefficient voltage generating circuit generates a positive temperature coefficient voltage and provides the positive temperature coefficient voltage to the control electrode of the first transistor. The first electrode of the first transistor is coupled to the output end of the linear voltage regulator circuit and the output end of the negative feedback circuit. The second electrode of the first transistor is coupled to the input end of the negative feedback circuit. The negative feedback circuit and the first transistor form a negative feedback loop to stabilize the output voltage of the linear voltage regulator circuit. The voltage difference between the control electrode and the first electrode of the first transistor has a negative temperature coefficient, and the absolute value of the negative temperature coefficient is equal to the temperature coefficient value of the positive temperature coefficient voltage.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of integrated circuit technology, and in particular, to linear voltage regulator circuits, chips, and electronic devices. Background Art

[0002] Traditional linear voltage regulator circuits (or linear voltage regulator sources) generally use a bandgap reference source and are implemented using an amplifier plus a negative feedback structure. Figure 1 A conventional linear voltage regulator circuit is shown. This circuit includes a bandgap reference, amplifier A, transistor Mp, and a current source. This circuit is typically complex in design, using numerous and large components, resulting in high power consumption and a large area. Furthermore, the output voltage of this type of circuit may experience temperature drift, limiting its application scenarios. Summary of the Invention

[0003] The embodiments described herein provide a linear voltage stabilization circuit, a chip, and an electronic device.

[0004] According to a first aspect of the present disclosure, a linear voltage regulator circuit is provided. The linear voltage regulator circuit includes: a positive temperature coefficient voltage generating circuit, a first transistor, and a negative feedback circuit. The positive temperature coefficient voltage generating circuit is configured to generate a positive temperature coefficient voltage and provide the positive temperature coefficient voltage to the control electrode of the first transistor. The first electrode of the first transistor is coupled to the output end of the linear voltage regulator circuit and the output end of the negative feedback circuit. The second electrode of the first transistor is coupled to the input end of the negative feedback circuit. The negative feedback circuit is configured to form a negative feedback loop with the first transistor to stabilize the output voltage of the linear voltage regulator circuit. The voltage difference between the control electrode and the first electrode of the first transistor has a negative temperature coefficient, and the absolute value of the negative temperature coefficient is equal to the temperature coefficient value of the positive temperature coefficient voltage.

[0005] In some embodiments of the present disclosure, a positive temperature coefficient voltage generating circuit is coupled to a control electrode of a first transistor via a first node. The positive temperature coefficient voltage generating circuit includes a positive temperature coefficient current source and an internal load circuit. The positive temperature coefficient current source is configured to generate a positive temperature coefficient current and provide the positive temperature coefficient current to the internal load circuit via the first node. The internal load circuit is configured to generate a positive temperature coefficient voltage based on the positive temperature coefficient current.

[0006] In some embodiments of the present disclosure, a positive temperature coefficient current source includes: second to sixth transistors, and a first resistor. The control electrode of the second transistor is coupled to the second electrode of the second transistor, the control electrode of the third transistor, the control electrode of the fourth transistor, and the second electrode of the fifth transistor. The first electrode of the second transistor is coupled to the first voltage terminal. The first electrode of the third transistor is coupled to the first voltage terminal. The second electrode of the third transistor is coupled to the control electrode and the second electrode of the sixth transistor. The first electrode of the fourth transistor is coupled to the first voltage terminal. The second electrode of the fourth transistor is coupled to the first node. The control electrode of the fifth transistor is coupled to the control electrode of the sixth transistor. The first electrode of the fifth transistor is coupled to the first end of the first resistor. The first electrode of the sixth transistor is coupled to the second voltage terminal. The second end of the first resistor is coupled to the second voltage terminal.

[0007] In some embodiments of the present disclosure, the fifth transistor and the sixth transistor are MOS transistors.

[0008] In some embodiments of the present disclosure, the fifth transistor and the sixth transistor are bipolar transistors.

[0009] In some embodiments of the present disclosure, the internal load circuit includes a second resistor, wherein a first end of the second resistor is coupled to the first node, and a second end of the second resistor is coupled to the second voltage terminal.

[0010] In some embodiments of the present disclosure, the temperature coefficient value of the positive temperature coefficient voltage is set to be equal to the absolute value of the negative temperature coefficient by adjusting the ratio of the resistance value of the second resistor to the resistance value of the first resistor.

[0011] In some embodiments of the present disclosure, R2=R1×|K2| / K1, where R2 represents the resistance value of the second resistor, R1 represents the resistance value of the first resistor, K2 represents a negative temperature coefficient, and K1 represents the temperature coefficient of the voltage difference across the first resistor.

[0012] In some embodiments of the present disclosure, a negative feedback circuit includes: seventh to eleventh transistors, and a first constant current source. The control electrode of the seventh transistor is coupled to the second electrode of the seventh transistor, the control electrode of the eighth transistor, and the second electrode of the first transistor. The first electrode of the seventh transistor is coupled to the second voltage terminal. The first electrode of the eighth transistor is coupled to the second voltage terminal. The second electrode of the eighth transistor is coupled to the control electrode and the second electrode of the ninth transistor. The first electrode of the ninth transistor is coupled to the first voltage terminal. The control electrode of the tenth transistor is coupled to the control electrode of the ninth transistor. The first electrode of the tenth transistor is coupled to the first voltage terminal. The second electrode of the tenth transistor is coupled to the first constant current source and the control electrode of the eleventh transistor. The first electrode of the eleventh transistor is coupled to the first voltage terminal. The second electrode of the eleventh transistor is coupled to the first electrode of the first transistor.

[0013] In some embodiments of the present disclosure, the first transistor is a MOS transistor.

[0014] In some embodiments of the present disclosure, the first transistor is a bipolar transistor.

[0015] According to a second aspect of the present disclosure, a linear voltage regulator circuit is provided. The linear voltage regulator circuit includes: first to eleventh transistors, a first resistor, a second resistor, and a first constant current source. The control electrode of the first transistor is coupled to the second electrode of the fourth transistor and the first end of the second resistor. The first electrode of the first transistor is coupled to the second electrode of the eleventh transistor. The second electrode of the first transistor is coupled to the control electrode and the second electrode of the seventh transistor. The control electrode of the second transistor is coupled to the second electrode of the second transistor, the control electrode of the third transistor, the control electrode of the fourth transistor, and the second electrode of the fifth transistor. The first electrode of the second transistor is coupled to the first voltage terminal. The first electrode of the third transistor is coupled to the first voltage terminal. The second electrode of the third transistor is coupled to the control electrode and the second electrode of the sixth transistor. The first electrode of the fourth transistor is coupled to the first voltage terminal. The control electrode of the fifth transistor is coupled to the control electrode of the sixth transistor. The first electrode of the fifth transistor is coupled to the first end of the first resistor. The first electrode of the sixth transistor is coupled to the second voltage terminal. The second end of the first resistor is coupled to the second voltage terminal. The second end of the second resistor is coupled to the second voltage terminal. The control electrode of the seventh transistor is coupled to the control electrode of the eighth transistor. The first electrode of the seventh transistor is coupled to the second voltage terminal. The first electrode of the eighth transistor is coupled to the second voltage terminal. The second electrode of the eighth transistor is coupled to the control electrode and the second electrode of the ninth transistor. The first electrode of the ninth transistor is coupled to the first voltage terminal. The control electrode of the tenth transistor is coupled to the control electrode of the ninth transistor. The first electrode of the tenth transistor is coupled to the first voltage terminal. The second electrode of the tenth transistor is coupled to the first constant current source and the control electrode of the eleventh transistor. The first electrode of the eleventh transistor is coupled to the first voltage terminal. The output voltage of the linear voltage regulator circuit is set to have a zero temperature coefficient by adjusting the ratio of the resistance value of the second resistor to the resistance value of the first resistor.

[0016] According to a third aspect of the present disclosure, a chip is provided, which includes the linear voltage stabilization circuit according to the first aspect or the second aspect of the present disclosure.

[0017] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising the chip according to the third aspect of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below. It should be noted that the drawings described below only relate to some embodiments of the present disclosure and are not intended to limit the present disclosure.

[0019] Figure 1 It is a schematic block diagram of a linear voltage regulator circuit;

[0020] Figure 2 is a schematic block diagram of a linear voltage stabilization circuit according to an embodiment of the present disclosure;

[0021] Figure 3 yes Figure 2 A schematic block diagram of a positive temperature coefficient voltage generating circuit is shown;

[0022] Figure 4 yes Figure 3 An exemplary circuit diagram of a positive temperature coefficient voltage generating circuit is shown; and

[0023] Figure 5 yes Figure 2 An exemplary circuit diagram of a negative feedback circuit is shown.

[0024] In the drawings, reference numerals having the same last two digits correspond to the same elements. It should be noted that the elements in the drawings are schematic and not drawn to scale. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work also fall within the scope of protection of the present disclosure.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the specification and the relevant art, and will not be interpreted in an idealized or overly formal manner unless otherwise explicitly defined herein. As used herein, a statement that two or more parts are "connected" or "coupled" together shall mean that the parts are joined together either directly or through one or more intermediate components.

[0027] In all embodiments of the present disclosure, since the source and drain of the metal oxide semiconductor (MOS) transistor are symmetrical, and the conduction current directions between the source and drain of the N-type transistor and the P-type transistor are opposite, in the embodiments of the present disclosure, the controlled middle end of the MOS transistor is referred to as the control electrode, and the other two ends of the MOS transistor are referred to as the first electrode and the second electrode, respectively. In addition, for the convenience of unified expression, in this context, the base of the bipolar transistor (BJT) is referred to as the control electrode, the emitter of the BJT is referred to as the first electrode, and the collector of the BJT is referred to as the second electrode. In addition, terms such as "first" and "second" are only used to distinguish one component (or a part of a component) from another component (or another part of a component).

[0028] In some ultra-low power applications, a linear voltage regulator with a certain power supply rejection ratio, extremely low power consumption, and low temperature drift characteristics is required.

[0029] Figure 2 A schematic block diagram of a linear voltage stabilization circuit 200 according to an embodiment of the present disclosure is shown. The linear voltage stabilization circuit 200 includes: a positive temperature coefficient voltage generating circuit 210 , a first transistor M1 , and a negative feedback circuit 220 .

[0030] The output terminal of the positive temperature coefficient voltage generating circuit 210 is coupled to the control terminal of the first transistor M1. The positive temperature coefficient voltage generating circuit 210 is configured to generate a positive temperature coefficient voltage VA and provide the positive temperature coefficient voltage VA to the control terminal of the first transistor M1. The positive temperature coefficient voltage VA increases with increasing temperature and decreases with decreasing temperature. In this context, the temperature coefficient value of the positive temperature coefficient voltage VA is denoted as Kp.

[0031] A first electrode of the first transistor M1 is coupled to the output terminal VREG of the linear voltage regulator circuit 200 and the output terminal of the negative feedback circuit 220. A second electrode of the first transistor M1 is coupled to the input terminal of the negative feedback circuit 220. In some embodiments of the present disclosure, the first transistor M1 is a MOS transistor. In other embodiments of the present disclosure, the first transistor M1 is a bipolar transistor. According to process characteristics, the voltage difference between the control electrode and the first electrode of the first transistor M1 has a negative temperature coefficient K2. In some embodiments of the present disclosure, the absolute value of the negative temperature coefficient K2 of the voltage difference can be set to be equal to the temperature coefficient value Kp of the positive temperature coefficient voltage VA generated by the positive temperature coefficient voltage VA generating circuit 210.

[0032] The negative feedback circuit 220 is coupled to the first and second electrodes of the first transistor M1 and the output terminal VREG of the linear voltage regulator circuit 200. The negative feedback circuit 220 is configured to form a negative feedback loop with the first transistor M1 to stabilize the output voltage VREG.

[0033] exist Figure 2 In the example, the first transistor M1 is a P-type transistor. Therefore, the output voltage VREG = VA + |VGS_M1|, where VA represents the positive temperature coefficient voltage VA, and VGS_M1 represents the voltage difference between the control electrode and the first electrode of the first transistor M1. When the first transistor M1 is a MOS transistor, VGS_M1 represents the gate-source voltage of the first transistor M1. When the first transistor M1 is a bipolar transistor, VGS_M1 represents the base-emitter voltage of the first transistor M1. The temperature coefficient Kp of the positive temperature coefficient voltage VA is equal to the absolute value of the temperature coefficient K2 of VGS_M1. In this way, the output voltage VREG can have a zero temperature coefficient.

[0034] In the circuit application environment, the output voltage VREG of the linear voltage regulator circuit 200 may be affected by load or power supply interference. If the output voltage VREG transiently increases, the current flowing through the first transistor M1 increases, and the negative feedback circuit 220 can reduce the output voltage VREG accordingly, thereby maintaining the output voltage VREG stable. If the output voltage VREG transiently decreases, the current flowing through the first transistor M1 decreases, and the negative feedback circuit 220 can increase the output voltage VREG accordingly, thereby maintaining the output voltage VREG stable. Therefore, the linear voltage regulator circuit 200 according to the embodiment of the present disclosure can output a stable output voltage VREG with good load regulation and extremely high power supply rejection ratio. Compared to Figure 1 The linear voltage regulator circuit 200 shown in the figure is simpler according to the embodiment of the present disclosure, and thus has lower power consumption and a smaller area.

[0035] Figure 3 A schematic block diagram of a positive temperature coefficient voltage generating circuit 310 is shown. In some embodiments of the present disclosure, the positive temperature coefficient voltage generating circuit 310 is coupled to the control electrode of the first transistor M1 via the first node N1. The positive temperature coefficient voltage generating circuit 310 includes a positive temperature coefficient current source 311 and an internal load circuit 312.

[0036] The positive temperature coefficient current source 311 is coupled to the internal load circuit 312 via the first node N1. The positive temperature coefficient current source 311 is configured to generate a positive temperature coefficient current and provide the positive temperature coefficient current to the internal load circuit 312 via the first node N1. The internal load circuit 312 is configured to generate a positive temperature coefficient voltage VA based on the positive temperature coefficient current.

[0037] Figure 4 FIG1 shows an exemplary circuit diagram of a positive temperature coefficient voltage generating circuit 410. The positive temperature coefficient current source 411 includes: a second transistor M2 to a sixth transistor M6, and a first resistor R1. Figure 4 In the example, a high voltage signal is input from the first voltage terminal V1, and the second voltage terminal V2 is grounded. The second transistor M2 to the fourth transistor M4 are P-type transistors. The fifth transistor M5 and the sixth transistor M6 are N-type transistors.

[0038] The control electrode of the second transistor M2 is coupled to the second electrode of the second transistor M2, the control electrode of the third transistor M3, the control electrode of the fourth transistor M4, and the second electrode of the fifth transistor M5. The first electrode of the second transistor M2 is coupled to the first voltage terminal V1. The first electrode of the third transistor M3 is coupled to the first voltage terminal V1. The second electrode of the third transistor M3 is coupled to the control electrode and second electrode of the sixth transistor M6. The first electrode of the fourth transistor M4 is coupled to the first voltage terminal V1. The second electrode of the fourth transistor M4 is coupled to the first node N1. The control electrode of the fifth transistor M5 is coupled to the control electrode of the sixth transistor M6. The first electrode of the fifth transistor M5 is coupled to the first end of the first resistor R1. The first electrode of the sixth transistor M6 is coupled to the second voltage terminal V2. The second end of the first resistor R1 is coupled to the second voltage terminal V2.

[0039] In some embodiments of the present disclosure, the fifth transistor M5 and the sixth transistor M6 are MOS transistors. In other embodiments of the present disclosure, the fifth transistor M5 and the sixth transistor M6 are bipolar transistors.

[0040] exist Figure 4 In the example of , the internal load circuit 412 includes: a second resistor R2 , wherein a first end of the second resistor R2 is coupled to the first node N1 , and a second end of the second resistor R2 is coupled to the second voltage terminal V2 .

[0041] The voltage difference across the first resistor R1 is equal to (VGS_M6-VGS_M5). According to process characteristics, (VGS_M6-VGS_M5) has a positive temperature coefficient, and its temperature coefficient is assumed to be K1. VGS_M6 represents the voltage difference between the control electrode and the first electrode of the sixth transistor M6. When the sixth transistor M6 is a MOS transistor, VGS_M6 represents the gate-source voltage of the sixth transistor M6. When the sixth transistor M6 is a bipolar transistor, VGS_M6 represents the base-emitter voltage of the sixth transistor M6. VGS_M5 represents the voltage difference between the control electrode and the first electrode of the fifth transistor M5. When the fifth transistor M5 is a MOS transistor, VGS_M5 represents the gate-source voltage of the fifth transistor M5. When the fifth transistor M5 is a bipolar transistor, VGS_M5 represents the base-emitter voltage of the fifth transistor M5.

[0042] The current flowing through the first resistor R1 is equal to (VGS_M6 - VGS_M5) / R1, where R1 represents the resistance value of the first resistor R1. The current flowing through the second transistor M2 is equal to the current flowing through the first resistor R1. The current flowing through the second transistor M2 is mirrored to the fourth transistor M4, so that the current output by the positive temperature coefficient current source 411 is equal to (VGS_M6 - VGS_M5) / R1. Therefore, the temperature coefficient of the current output by the positive temperature coefficient current source 411 is K1 / R1.

[0043] The current output by the positive temperature coefficient current source 411 is applied to the second resistor R2, so that the positive temperature coefficient voltage VA = (VGS_M6-VGS_M5) × R2 / R1, where R2 represents the resistance value of the second resistor R2. Therefore, the temperature coefficient of the positive temperature coefficient voltage VA is Kp = K1 × R2 / R1.

[0044] In some embodiments of the present disclosure, the temperature coefficient value Kp of the positive temperature coefficient voltage VA can be set to be equal to the absolute value of the negative temperature coefficient K2 by adjusting the ratio R2 / R1 of the resistance value of the second resistor R2 to the resistance value of the first resistor R1.

[0045] In some embodiments of the present disclosure, the second transistor M2, the third transistor M3, the fifth transistor M5, the sixth transistor M6, and the first resistor R1 can be reused with circuits external to the linear voltage regulator circuit 200. Therefore, the resistance value of the first resistor R1 can be fixed. Thus, within the linear voltage regulator circuit 200, by adjusting the resistance value of the second resistor R2 such that R2 = R1 × Kp / K1 = R1 × |K2| / K1, the output voltage VREG can have a zero temperature coefficient.

[0046] Those skilled in the art should understand that based on the above invention concept Figure 4 The variation of the circuit shown should also fall within the scope of protection of the present disclosure. In this variation, the above-mentioned transistor and voltage terminal may also have the same Figure 4 Examples of different setups are shown.

[0047] Figure 5 FIG. 5 shows an exemplary circuit diagram of a negative feedback circuit 520. The negative feedback circuit 520 includes: a seventh transistor M7 to an eleventh transistor M11, and a first constant current source I1. Figure 5 In the example of FIG, a high voltage signal is input from the first voltage terminal V1, and the second voltage terminal V2 is grounded. The seventh transistor M7 and the eighth transistor M8 are N-type transistors. The ninth transistor M9 to the eleventh transistor M11 are P-type transistors.

[0048] The control electrode of the seventh transistor M7 is coupled to the second electrode of the seventh transistor M7, the control electrode of the eighth transistor M8, and the second electrode of the first transistor M1. The first electrode of the seventh transistor M7 is coupled to the second voltage terminal V2. The first electrode of the eighth transistor M8 is coupled to the second voltage terminal V2. The second electrode of the eighth transistor M8 is coupled to the control electrode and the second electrode of the ninth transistor M9. The first electrode of the ninth transistor M9 is coupled to the first voltage terminal V1. The control electrode of the tenth transistor M10 is coupled to the control electrode of the ninth transistor M9. The first electrode of the tenth transistor M10 is coupled to the first voltage terminal V1. The second electrode of the tenth transistor M10 is coupled to the first constant current source I1 and the control electrode of the eleventh transistor M11. The first electrode of the eleventh transistor M11 is coupled to the first voltage terminal V1. The second electrode of the eleventh transistor M11 is coupled to the first electrode of the first transistor M1.

[0049] In circuit applications, the output voltage VREG of the linear voltage regulator circuit 200 may be affected by load or power supply interference. If the output voltage VREG transiently increases, the current flowing through the first transistor M1 increases. The seventh transistor M7 and the eighth transistor M8 form a current mirror. The ninth transistor M9 and the tenth transistor M10 also form a current mirror. As a result, the current flowing through the tenth transistor M10 increases, thereby raising the voltage at the control electrode of the eleventh transistor M11. As a result, the output voltage VREG is correspondingly reduced, maintaining a stable output voltage VREG.

[0050] If the output voltage VREG decreases transiently, the current flowing through the first transistor M1 decreases. Consequently, the current flowing through the tenth transistor M10 decreases, thereby lowering the voltage at the control electrode of the eleventh transistor M11. Therefore, the output voltage VREG is correspondingly raised, thereby maintaining the output voltage VREG stable.

[0051] In this way, even if the output voltage VREG is affected by the load, the linear voltage regulator circuit according to the embodiment of the present disclosure can output a stable output voltage VREG with a good power supply rejection ratio. Figure 1 The linear voltage regulator circuit shown in the figure is simpler according to the embodiment of the present disclosure, and thus has lower power consumption and a smaller area.

[0052] Those skilled in the art should understand that based on the above invention concept Figure 5 The variation of the circuit shown should also fall within the scope of protection of the present disclosure. In this variation, the above-mentioned transistor and voltage terminal may also have the same Figure 5 Examples of different setups are shown.

[0053] The embodiments of the present disclosure further provide a chip. The chip includes a linear voltage regulator circuit according to the embodiments of the present disclosure. The chip is, for example, a power management chip.

[0054] An embodiment of the present disclosure further provides an electronic device. The electronic device includes a chip according to an embodiment of the present disclosure. The electronic device is, for example, a smart terminal device such as a tablet computer, a smart phone, etc.

[0055] In summary, the linear voltage regulator circuit according to the embodiment of the present disclosure has a low-temperature drift characteristic. The linear voltage regulator circuit according to the embodiment of the present disclosure has a stable output and a good power supply rejection ratio. The linear voltage regulator circuit according to the embodiment of the present disclosure has a simple circuit structure, low power consumption, and a small area.

[0056] Unless the context clearly indicates otherwise, as used herein and in the appended claims, the singular includes the plural, and vice versa. Thus, when referring to the singular, the plural of the corresponding term is generally included. Similarly, the words "include" and "comprising" are to be interpreted as inclusive rather than exclusive. Likewise, the terms "include" and "or" should be interpreted as inclusive unless such interpretation is expressly prohibited herein. Where the term "example" is used herein, particularly when it follows a group of terms, the "example" is merely exemplary and illustrative and should not be considered exclusive or comprehensive.

[0057] Further aspects and scope of adaptability become apparent from the description provided herein. It should be understood that various aspects of the present application can be implemented individually or in combination with one or more other aspects. It should also be understood that the description and specific embodiments herein are intended to be illustrative only and are not intended to limit the scope of the present application.

[0058] Several embodiments of the present disclosure have been described in detail above, but it is obvious that those skilled in the art can make various modifications and variations to the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. The scope of protection of the present disclosure is defined by the appended claims.

Claims

1. A linear voltage stabilization circuit comprising: a positive temperature coefficient voltage generating circuit, a first transistor, and a negative feedback circuit, The positive temperature coefficient voltage generating circuit is configured to: generate a positive temperature coefficient voltage and provide the positive temperature coefficient voltage to the control electrode of the first transistor; A first electrode of the first transistor is coupled to the output end of the linear voltage regulator circuit and the output end of the negative feedback circuit, and a second electrode of the first transistor is coupled to the input end of the negative feedback circuit; The negative feedback circuit is configured to: form a negative feedback loop with the first transistor to stabilize the output voltage of the linear voltage regulator circuit; wherein the voltage difference between the control electrode and the first electrode of the first transistor has a negative temperature coefficient, and the absolute value of the negative temperature coefficient is equal to the temperature coefficient value of the positive temperature coefficient voltage; The positive temperature coefficient voltage generating circuit is coupled to the control electrode of the first transistor via a first node, and the positive temperature coefficient voltage generating circuit includes: a positive temperature coefficient current source and an internal load circuit. The positive temperature coefficient current source is configured to: generate a positive temperature coefficient current and provide the positive temperature coefficient current to the internal load circuit via the first node; The internal load circuit is configured to generate the positive temperature coefficient voltage according to the positive temperature coefficient current.

2. The linear voltage stabilizing circuit according to claim 1, wherein: The positive temperature coefficient current source includes: second to sixth transistors and a first resistor. The control electrode of the second transistor is coupled to the second electrode of the second transistor, the control electrode of the third transistor, the control electrode of the fourth transistor and the second electrode of the fifth transistor, and the first electrode of the second transistor is coupled to the first voltage terminal; A first electrode of the third transistor is coupled to the first voltage terminal, and a second electrode of the third transistor is coupled to the control electrode and the second electrode of the sixth transistor; A first electrode of the fourth transistor is coupled to the first voltage terminal, and a second electrode of the fourth transistor is coupled to the first node; The control electrode of the fifth transistor is coupled to the control electrode of the sixth transistor, and the first electrode of the fifth transistor is coupled to the first end of the first resistor; The first electrode of the sixth transistor is coupled to the second voltage terminal; The second end of the first resistor is coupled to the second voltage end.

3. The linear voltage stabilizing circuit according to claim 2, wherein: The internal load circuit includes: a second resistor, The first end of the second resistor is coupled to the first node, and the second end of the second resistor is coupled to the second voltage end.

4. The linear voltage stabilizing circuit according to claim 3, wherein: R2=R1×|K2| / K1, Wherein, R2 represents the resistance value of the second resistor, R1 represents the resistance value of the first resistor, K2 represents the negative temperature coefficient, and K1 represents the temperature coefficient of the voltage difference across the first resistor.

5. The linear voltage stabilizing circuit according to claim 1, wherein: The negative feedback circuit includes: a seventh transistor to an eleventh transistor, and a first constant current source. wherein the control electrode of the seventh transistor is coupled to the second electrode of the seventh transistor, the control electrode of the eighth transistor and the second electrode of the first transistor, and the first electrode of the seventh transistor is coupled to the second voltage terminal; A first electrode of the eighth transistor is coupled to the second voltage terminal, and a second electrode of the eighth transistor is coupled to the control electrode and the second electrode of the ninth transistor; The first electrode of the ninth transistor is coupled to the first voltage terminal; a control electrode of a tenth transistor coupled to the control electrode of the ninth transistor, a first electrode of the tenth transistor coupled to the first voltage terminal, and a second electrode of the tenth transistor coupled to the first constant current source and the control electrode of the eleventh transistor; A first electrode of the eleventh transistor is coupled to the first voltage terminal, and a second electrode of the eleventh transistor is coupled to the first electrode of the first transistor.

6. The linear voltage stabilizing circuit according to claim 1, wherein: The first transistor is a MOS transistor or a bipolar transistor.

7. A linear voltage stabilization circuit comprising: first to eleventh transistors, a first resistor, a second resistor, and a first constant current source, The control electrode of the first transistor is coupled to the second electrode of the fourth transistor and the first end of the second resistor, the first electrode of the first transistor is coupled to the second electrode of the eleventh transistor, and the second electrode of the first transistor is coupled to the control electrode and the second electrode of the seventh transistor; The control electrode of the second transistor is coupled to the second electrode of the second transistor, the control electrode of the third transistor, the control electrode of the fourth transistor and the second electrode of the fifth transistor, and the first electrode of the second transistor is coupled to the first voltage terminal; A first electrode of the third transistor is coupled to the first voltage terminal, and a second electrode of the third transistor is coupled to the control electrode and the second electrode of the sixth transistor; A first electrode of the fourth transistor is coupled to the first voltage terminal; The control electrode of the fifth transistor is coupled to the control electrode of the sixth transistor, and the first electrode of the fifth transistor is coupled to the first end of the first resistor; The first electrode of the sixth transistor is coupled to the second voltage terminal; The second end of the first resistor is coupled to the second voltage end; The second end of the second resistor is coupled to the second voltage end; The control electrode of the seventh transistor is coupled to the control electrode of the eighth transistor, and the first electrode of the seventh transistor is coupled to the second voltage end; A first electrode of the eighth transistor is coupled to the second voltage terminal, and a second electrode of the eighth transistor is coupled to the control electrode and the second electrode of the ninth transistor; The first electrode of the ninth transistor is coupled to the first voltage terminal; a control electrode of a tenth transistor coupled to the control electrode of the ninth transistor, a first electrode of the tenth transistor coupled to the first voltage terminal, and a second electrode of the tenth transistor coupled to the first constant current source and the control electrode of the eleventh transistor; The first electrode of the eleventh transistor is coupled to the first voltage terminal; The output voltage of the linear voltage stabilization circuit is set to have a zero temperature coefficient by adjusting the ratio of the resistance value of the second resistor to the resistance value of the first resistor.

8. A chip comprising: The linear voltage stabilizing circuit according to any one of claims 1 to 7.

9. An electronic device comprising: The chip according to claim 8.

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