The AZ431BR-A is a three-terminal adjustable shunt regulator offering excellent temperature stability and sharp turn-on characteristics. This device functions as a precision voltage reference combined with a high-gain operational amplifier, making it suitable for various applications requiring a stable and adjustable voltage reference.

Applications:

• Power Supplies: Used as a voltage reference in linear and switching-mode power supplies.
• Voltage Monitoring: Implemented in circuits for over-voltage and under-voltage protection.
• Instrumentation: Employed in precision measurement and control applications.
• Battery Chargers: Provides stable voltage regulation in battery charging systems.
• LED Drivers: Used in constant current LED driver circuits.

Features:

• Adjustable Output Voltage: The output voltage can be adjusted between Vref (2.5V) and 36V using two external resistors.
• Low Temperature Coefficient: Provides stable operation over a broad temperature range.
• Sharp Turn-On Characteristics: Ensures a well-defined and consistent output voltage.
• Low Dynamic Output Impedance: Maintains stable operation under varying load conditions.
• Sink Current Capability: Typically capable of sinking current ranging from 1mA to 100mA.

Benefits:

• Stable Voltage Reference: Provides a highly stable voltage reference, essential for accurate and reliable circuit performance.
• Flexibility: The adjustable output voltage enables its use in a variety of applications.
• Cost-Effective: Offers a budget-friendly solution for voltage regulation and monitoring.
• Reliable Performance: Designed for stable performance in diverse operating environments.
• Simplified Design: Requires minimal external components, which simplifies circuit design and reduces board space.

Additional Details:

The AZ431BR-A features a reference voltage of 2.5V. Operating temperature ranges depend on the grade. Common packages include through-hole (TO-92) and surface-mount (SOT-23, SOT-89). The device's low output noise and excellent stability make it ideal for sensitive analog applications. It is often used in error amplifier configurations in SMPS.