Low dropout linear regulators and control methods, battery management systems, electronic equipment

CN117492503BActive Publication Date: 2026-05-26海光信息技术(成都)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
海光信息技术(成都)有限公司
Filing Date
2023-11-09
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The control circuit of a low-dropout linear regulator exhibits voltage undershoot, leading to unstable output voltage and affecting the normal operation of the power supply circuit.

Method used

By introducing a switch array, analog-to-digital converter circuit, undershoot detector, and controller, the undershoot detector detects voltage undershoot, and the controller generates control signals based on preset standard voltage, digital voltage, and preset compensation voltage to control the number of switches in the switch array to achieve voltage stability compensation.

Benefits of technology

This improves the stability of the output voltage of the low-dropout linear regulator, prevents excessive voltage fluctuations, and ensures the normal operation of the power supply circuit.

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    Figure CN117492503B_ABST
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Abstract

This application provides a low-dropout linear regulator and its control method, a battery management system, and an electronic device, relating to the technical field of electronic circuits. The low-dropout linear regulator includes: a switching array, an analog-to-digital converter (ADC), an undershoot detector, and a controller. The input terminal of the ADC is connected to the output terminal of the switching array, and the ADC is configured to convert the output voltage of the switching array into a digital voltage. The first input terminal of the undershoot detector is connected to the output terminal of the switching array, and the undershoot detector is configured to detect undershoot of the output voltage of the switching array and obtain a detection result. The first input terminal of the controller is configured to receive a preset standard voltage. The second input terminal of the controller is connected to the output terminal of the ADC, the third input terminal of the controller is connected to the output terminal of the undershoot detector, and the fourth input terminal of the controller is configured to receive a preset compensation voltage. The output terminal of the controller is connected to the control terminal of the switching array.
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