onsemi SC431AVSNT1G: High-Accuracy Adjustable Shunt Regulator

The onsemi SC431AVSNT1G is a highly precise, three-terminal adjustable shunt regulator designed to deliver exceptional voltage reference performance across a wide range of applications. This device is engineered to provide a stable and reliable voltage reference, which is critical for ensuring the accuracy and efficiency of power supplies, voltage monitoring circuits, and error amplifiers.

A key feature of the SC431AVSNT1G is its high initial accuracy of ±0.5% at 25°C, making it suitable for precision-critical applications where tight voltage tolerances are required. The device offers an adjustable output voltage range from Vref (approximately 2.5V) to 36V, providing designers with significant flexibility in setting the desired regulation point using two external resistors.

The SC431AVSNT1G operates with a low dynamic impedance, typically 0.15Ω, which ensures stable performance even under varying load conditions. This characteristic, combined with a wide operating cathode current range of 1.0 mA to 100 mA, allows the device to maintain consistent regulation across diverse operational scenarios. Additionally, its low output noise performance makes it ideal for sensitive analog and digital circuits where signal integrity is paramount.

This shunt regulator is designed for robustness and reliability, with a operational temperature range of -40°C to +125°C, ensuring consistent performance in harsh environments. It is commonly used in switch-mode power supplies (SMPS), linear regulators, battery chargers, and over-voltage protection circuits. Its ability to function as a high-accuracy voltage reference also makes it valuable in analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).

The SC431AVSNT1G is available in a space-saving SOT-23-3 package, making it suitable for compact PCB designs. Its combination of precision, flexibility, and durability positions it as a go-to component for engineers seeking to enhance the performance and reliability of their electronic systems.

ICGOODFIND

The onsemi SC431AVSNT1G stands out as a versatile and high-accuracy shunt regulator, offering precision voltage referencing, broad adjustability, and stable performance for advanced power management and regulation tasks.

Keywords:

Shunt Regulator

Voltage Reference

High Accuracy

Adjustable Output

Low Dynamic Impedance