SC431AVSNT1G Integrated Circuits (ICs)

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PMIC (Power Management ICs) are essential for modern electronics, providing accurate and efficient control of all aspects of power in a device, from start-up and reset to power sequencing, power management and voltage regulation, to name just a few. A key component within these PMICs is the voltage reference, which is used to set the operating/reference voltage value for a number of voltage regulation functions within the integrated circuit.The SC431AVSNT1G is an ultra-precise bandgap voltage reference, designed for high accuracy applications. The device offers an industry leading accuracy specification of ±0.25mV, ideal for a range of demanding applications such as the design of analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).

1. Application Field of SC431AVSNT1G

The SC431AVSNT1G provides an extremely stable output voltage for use in a range of high accuracy applications. The device offers 30ppm/°C temperature coefficient over an extended temperature range, allowing high-accuracy designs that can withstand extreme temperatures. Having an industry leading output voltage accuracy of ±0.25mV, the device is well suited for use in high resolution ADCs and DACs and other similar devices, where the output voltage accuracy and temperature stability are important factors. The device is also ideal for use in buck converters, providing a stable reference voltage that maintains its accuracy over time and temperature.

2. Working Principle of SC431AVSNT1G

The SC431AVSNT1G uses a unique combination of circuitry and output reference architecture to provide its high accuracy and excellent temperature stability. The device utilizes a bandgap topology, where a reference voltage is generated from the relationship between the PNP and NPN transistors. The output voltage is then compared to the reference voltage, and a circuit generates an error signal which is used to correct or adjust the output voltage. This closed-loop system ensures that the output voltage remains very stable, unaffected by circuit noise or other local variations in power supply voltage. The SC431AVSNT1G also incorporates a low output impedance of 14kΩ, allowing it to drive loads up to 84mA, while maintaining its output voltage accuracy over a wide range of temperatures. The device also utilizes a delay circuit protection feature, which pulls the output low if it detects an inrush current over a certain threshold.

Conclusion

The SC431AVSNT1G is an ideal solution for high accuracy applications, providing an industry leading output voltage accuracy of ±0.25mV, along with excellent temperature stability. The device’s low output impedance of 14kΩ ensures that the output voltage remains stable when driving loads up to 84mA, making it suitable for use in various types of converters and other high accuracy applications.

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