AP431ASRG-7 Integrated Circuits (ICs)

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PMIC - Voltage Reference: AP431ASRG-7 Application Field and Working Principle

Voltage references are an essential part of any power management system and are used to regulate power by providing a stable reference for linear control circuits. With the ongoing development of advanced system solutions, their application fields keep increasing. The AP431ASRG-7 regulator from Diodes Incorporated is a shunt voltage reference that is designed to provide a very accurate, temperature-stable reference voltage for use in wide variety of power management applications.

AP431ASRG-7 Application Field

The AP431ASRG-7 is often used in high accuracy monitoring and control systems, such as automotive applications, which typically require more precise regulation than a typical linear voltage regulator can provide. It can be used in DC/DC converters, low-dropout (LDO) regulators, battery charging solutions, and power management ICs (PMICs) with secondary control loops. Furthermore, it can also be used to provide a stable reference voltage for temperature sensing and power sequencing applications.

Due to its ability to provide very accurate and temperature-stable reference voltages, the AP431ASRG-7 has a wide range of applications, such as:

• Automotive DC/DC converters
• Battery charging solutions
• Power management ICs
• Temperature sensing
• Power sequencing

AP431ASRG-7 Working Principle

The AP431ASRG-7 uses a shunt voltage reference to provide a very accurate and temperature-stable reference voltage. It is based on a PNP bipolar transistor, which is biased by an internal current source. The resulting voltage across the transistor\'s base/emitter junction is compared to a bandgap reference voltage, and the device adjusts its output voltage accordingly to maintain a very consistent and temperature-stable reference voltage. This process allows the AP431ASRG-7 to maintain an accuracy of ±0.2% (max) at an operating temperature of -40°C to +85°C.

The AP431ASRG-7 can also provide over-temperature protection with a thermal shutdown feature. This feature is triggered when the device\'s temperature exceeds its thermal limit, and can be reset when the temperature drops to a safe level.

Conclusion

The AP431ASRG-7 is a high accuracy, temperature-stable voltage reference designed for a variety of power management applications. It uses a shunt voltage reference to provide a very accurate and temperature-stable reference voltage, and can also provide over-temperature protection with a thermal shutdown feature. This makes it ideal for use in a wide range of high accuracy monitoring and control systems, such as automotive applications, DC/DC converters, battery charging solutions, and power management ICs.

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