The TA76L431FT(TE85L) is a precision adjustable shunt regulator manufactured by Toshiba Semiconductor and Storage. It is designed to provide a stable and accurate reference voltage, making it suitable for a wide range of applications requiring precise voltage regulation.

Applications:

• Voltage regulators: Used in linear and switching voltage regulators to provide a stable reference voltage.
• Adjustable power supplies: Employed in adjustable power supplies to control the output voltage precisely.
• Overvoltage protection circuits: Incorporated in overvoltage protection circuits to trigger protection mechanisms when the voltage exceeds a predetermined level.
• Current source circuits: Used to create stable and precise current sources.
• Instrumentation and measurement equipment: Applied in precision measurement instruments where a stable reference voltage is crucial for accuracy.

Features:

• Adjustable Output Voltage: The output voltage can be adjusted to any value between Vref (approximately 2.5V) and 36V using two external resistors.
• Low Temperature Coefficient: Offers excellent stability over a wide temperature range.
• Low Dynamic Output Impedance: Provides stable operation with varying load currents.
• Sink Current Capability: Capable of sinking current up to 100mA.
• Wide Operating Temperature Range: Suitable for use in various industrial and commercial environments.
• Small Surface Mount Package: Available in a small surface mount package (SOT-23), saving board space.

Benefits:

• High Precision: Ensures accurate voltage regulation, improving the performance and reliability of the system.
• Flexibility: Adjustable output voltage allows for customization to meet specific application requirements.
• Stable Performance: Low temperature coefficient and dynamic output impedance ensure stable operation under varying conditions.
• Simplified Design: Requires only a few external components, simplifying the design process.
• Space Saving: Small surface mount package saves valuable board space.

Additional Details:

The TA76L431FT(TE85L) operates by comparing a fraction of its output voltage with an internal voltage reference. The error amplifier then adjusts the shunt current through the device to maintain a constant output voltage. The output voltage is determined by the following equation: Vout = Vref * (1 + R1/R2), where R1 and R2 are external resistors, and Vref is approximately 2.5V.

This shunt regulator is commonly used in applications where precise voltage regulation and stability are critical, offering a cost-effective and reliable solution for various electronic systems.