The TL431AZSF is a precision adjustable shunt regulator manufactured by TAEJIN / HTC Korea. It is commonly used as a voltage reference and error amplifier in power supplies, voltage monitoring circuits, and other analog applications. The device provides a stable and accurate voltage reference with a low temperature coefficient.

Applications:

• Switching Power Supplies
• Voltage Monitoring
• Linear Regulators
• Adjustable Power Supplies
• Error Amplifiers

Features:

• Programmable Output Voltage: Adjustable output voltage via external resistors.
• Low Dynamic Output Impedance: Provides stable regulation under varying load conditions.
• Sink Current Capability: 1 mA to 100 mA
• Low Temperature Coefficient: Ensures stable performance over a wide temperature range.
• Precision Reference Voltage: Accurate and reliable voltage reference.
• Available in a variety of packages: including SOT-23 and others.

Benefits:

• Precise Voltage Regulation: Provides stable and accurate output voltage.
• Flexible Design: Adjustable output voltage allows for customization.
• Stable Performance: Low temperature coefficient ensures consistent performance.
• Reduced Component Count: Simplifies circuit design.
• Cost-Effective: Affordable and readily available.

The TL431AZSF operates by comparing a fraction of its output voltage to its internal reference voltage. An external resistor divider network is used to set the desired output voltage. The device then adjusts its internal current to maintain the output voltage at the setpoint. The low dynamic output impedance ensures that the output voltage remains stable even when the load current changes.

This shunt regulator is widely used in switching power supplies to provide a stable and regulated output voltage. It is also used in voltage monitoring circuits to detect over-voltage or under-voltage conditions. Its versatility and ease of use make it a popular choice for a wide range of analog applications.

Technical Specifications (Typical): Reference Voltage: 2.495 V, Output Voltage Range: Vref to 36 V, Sink Current: 1 mA to 100 mA, Operating Temperature: -40°C to +125°C. Consult the manufacturer's datasheet for precise specifications and package options.