DLDO control circuit
A control circuit and controller technology, applied in the direction of electric controllers, control/regulation systems, controllers with specific characteristics, etc., can solve the problems of imperfect control process, lack of digitization, low voltage control accuracy and low speed, etc. Achieve the effect of improving voltage control speed and control accuracy
Pending Publication Date: 2021-04-13
CHENGDU HAIGUANG MICROELECTRONICS TECH CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, in some existing DLDO structures, the core algorithm of the control circuit is the dichotomy method, and the external comparator and load matching are controlled through the dichotomy control method to control the voltage change, but the response speed is slow
Or in other DLDO structures, the core of the control circuit is a three-loop DLDO circuit built with a shift register. The control method is mainly to control the result of the voltage comparator of the analog circuit, and adjust it through the three loops built by itself. , but its control process is not perfect, it has not achieved complete digitalization, and the voltage control accuracy and speed are low
Method used
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Embodiment Construction
[0025] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0026] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0027] figure 1 is a schematic diagram of a DLDO control circuit shown according to one or more embodiments of the present invention, such as figure 1 As shown, the circuit includes:
[0028] DLDO controller, input voltage unit and analog circuit voltage control unit;
[0029] The DLDO controller is used to obtain a target voltage value, and the target voltage value is provided to a PID control unit provided in the DLDO controller, and the PID control unit is used to adjust the output voltage of the DLDO controller...
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One or more embodiments of the invention disclose a DLDO control circuit. The DLDO control circuit comprises a DLDO controller, an input voltage unit and an analog circuit voltage control unit; the DLDO controller is used for obtaining a target voltage value and providing the target voltage value for a PID control unit arranged in the DLDO controller, and the PID control unit is used for adjusting the output voltage of the DLDO controller according to the target voltage value to obtain an adjusted first voltage; the DLDO controller supplies the first voltage to the analog circuit voltage control unit; the input voltage unit is used for providing a reference voltage for the analog circuit voltage control unit; and the analog circuit voltage control unit is used for adjusting the reference voltage according to the first voltage to obtain an adjusted voltage, and the circuit improves the voltage control precision and speed in the DLDO control circuit.
Description
technical field [0001] The invention relates to the technical field of integrated circuit power management, in particular to a DLDO (Digitial Lowdropout Regulator, digital low-voltage linear regulator) control circuit. Background technique [0002] In the application of low-power SOC (System-on-a-Chip, system-on-a-chip), due to the relatively poor performance of the traditional LDO (Low Dropout Regulator, low-voltage linear regulator) in the loop gain, DLDO is used in digital circuits. With the continuous development of technology, it supports low-voltage working scenarios, and at the same time, the control is more comprehensive, which is more suitable for the power management solution in SOC. At present, in some existing DLDO structures, the core algorithm of the control circuit is the dichotomy method, which controls the external comparator and load matching to control the voltage change, but the response speed is slow. Or in other DLDO structures, the core of the control...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G05F1/46G05B11/42
CPCG05F1/46G05B11/42
Inventor 徐飞
Owner CHENGDU HAIGUANG MICROELECTRONICS TECH CO LTD