A system and chip for configuring the output current of a low-dropout linear regulator

Abstract

The invention is suitable for the field of electronic circuit design and provides a system for configuring the output current of a low-drop-out regulator and a chip. The system is used for detecting the output voltage of the low-drop-out regulator or the bypass current of a core circuit in real time, automatically regulating the size of a second configuration code if detection results do not meet the conditions and associatively storing a current first configuration code and a current second configuration code if the detection results meet the conditions; a corresponding relation between a plurality of groups of first configuration codes and a plurality of groups of second configuration codes can be obtained through changing the sizes of the first configuration codes. The system for configuring the output current of the low-drop-out regulator and the chip have the benefits that when the system is in use, under different second configuration codes, the corresponding first configuration code is searched by utilizing the stored corresponding relation to realize the regulation of the working speed of the core circuit, so that the core circuit can make full use of the output current of the low-drop-out regulator; the output current of the low-drop-out regulator can be more accurately applied; the corresponding relation between the plurality of groups of first configuration codes and the plurality of groups of second configuration codes can be established at one time, so that the test cost is reduced.

Description

technical field [0001] The invention belongs to the field of electronic circuit design, and in particular relates to a system and a chip for configuring the output current of a low-dropout linear regulator. Background technique [0002] In a chip using wireless power supply, the chip obtains energy from the external electromagnetic field through the antenna, and then outputs it to the core circuit in the chip after being converted by a low dropout regulator (Low Dropout Regulator, LDO). The operating frequency of the core circuit is related to the output power of the low dropout linear regulator. If the output power of the low dropout linear regulator is larger, the operating current of the core circuit is larger and the operating frequency is higher. Therefore, it is necessary to know the The relationship between the output power of the voltage regulator and the operating current of the core circuit. [0003] In the low dropout linear voltage regulator adopting the constan...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a system for configuring the output current of the low-dropout linear voltage regulator, aiming at solving the problem of configuring the low-dropout linear voltage regulator according to the worst process angle during each mid-test of the chip in the existing configuration method Output current, there will be waste of output current in other process corners, and the problem of high test cost

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