The TL431CUS is a precision adjustable shunt regulator manufactured by Analog Integrations Corporation (AIC). It is widely used as a voltage reference and error amplifier in various power supply and voltage regulation applications. Its key features include adjustable output voltage, high accuracy, and low temperature coefficient, making it a versatile component for precision voltage control.

Applications:

• Switching power supplies
• Adjustable voltage regulators
• Voltage monitors
• Error amplifiers
• Precision current sources

Features:

• Adjustable output voltage
• High precision
• Low temperature coefficient
• Low output impedance
• Sink current capability
• Small surface mount package (SOT-23 or similar)

Benefits:

• Provides precise and stable voltage regulation
• Simplifies circuit design with adjustable output voltage
• Maintains accuracy over a wide temperature range
• Enhances loop stability in feedback control systems
• Offers flexibility in various circuit configurations
• Reduces board space requirements

Additional Details:

The TL431CUS can be configured to regulate voltages from approximately 2.5V to 36V by using external resistors. It features a low temperature coefficient, ensuring stable performance over a wide temperature range. The low output impedance contributes to loop stability in feedback control systems. The device has a sink current capability, allowing it to regulate the output voltage by sinking current from the load. It is typically available in a small surface mount package, such as SOT-23, which saves board space. The reference voltage is a key parameter to consider, as it determines the minimum output voltage that can be regulated. The operating temperature range is typically from -40°C to +85°C.

This shunt regulator is commonly used in power supplies, battery chargers, and other voltage regulation circuits. It is used as a voltage reference in feedback control systems. Proper selection of external resistors is crucial for setting the desired output voltage. The TL431CUS provides a cost-effective solution for precision voltage regulation in a variety of electronic systems. Its adjustable output voltage and high accuracy make it a versatile component for various voltage control applications.