Method for calibrating low-dropout linear voltage stabilizer

A low dropout linear, voltage regulator technology, applied in instruments, regulating electrical variables, control/regulating systems, etc., can solve problems such as inability to read trimming values ​​correctly, inability to work normally, and improve chip yield and reduce costs. Effect

Active Publication Date: 2016-03-30
CHIPSEA TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present in this technology improves the performance and efficiency of an electronic device's power supply system by reducing variations caused during startup or shutdown conditions that could affect its ability to perform properly with other components on it. This results in improved overall productivity while maintaining high quality standards over time.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the accuracy and speed at which data processing systems use flash devices like flash drives due to variations in their voltages during production or usage. These issues may lead to errors when adjustments made based solely upon incorrect values being provided through trim settings.

Method used

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  • Method for calibrating low-dropout linear voltage stabilizer
  • Method for calibrating low-dropout linear voltage stabilizer
  • Method for calibrating low-dropout linear voltage stabilizer

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] figure 1 Shown is the hardware circuit structure included in the LDO hardware calibration implemented in the present invention. It mainly includes LDO, LDO hardware Trimming module and storage unit flash. The functions of each circuit unit are as follows:

[0034] LDO: When the power supply voltage VDD is connected, the LDO output voltage LDO_VDD for Flash is generated according to the trimming value sent by the LDO hardware trimming module.

[0035] LDO hardware trimming module: read the LDO key and LDOtrimming value stored in Flash, and provide the LDOTrimming value to LDO, thereby changin

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Abstract

The invention discloses a method for calibrating a low-dropout linear voltage stabilizer. According to the method, firstly, when an LDO trimming value is stored in flash, an LDO secret key is stored at the same time; after power-on, the LDO secret key is read from flash, and whether LDO output voltage is adjusted or not is determined according to whether the read LDO secret key is correct or not; when the read LDO secret key is incorrect, the LDO output voltage is adjusted into LDO_VDD through the dichotomy; when the correct LDO secret key is read, it is considered that the LDO output voltage can support normal reading of flash, then the LDO trimming value stored in flash is read, and the LDO output voltage is adjusted into a voltage center value; normal work starts. By means of the method, a chip with initial LDO output voltage beyond the voltage range required by normal work of flash can work normally, the chip yield can also be increased, and cost is reduced.

Description

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Claims

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Application Information

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Owner CHIPSEA TECH SHENZHEN CO LTD
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