The TL431CSF is a precision adjustable shunt regulator manufactured by TAEJIN / HTC Korea. Similar to other TL431 variants, this three-terminal adjustable regulator provides excellent temperature stability. It's commonly used as a precise voltage reference and is a versatile alternative to zener diodes in a variety of circuit designs. The output voltage of the TL431CSF can be adjusted within a range of Vref (typically 2.5V) to 36V by selecting appropriate external resistor values.

Applications

• Precision Voltage Reference in Power Supplies
• Adjustable Linear Regulators
• Switching Mode Power Supply Feedback Control
• Overvoltage and Undervoltage Protection Circuits
• Current Limiting Circuits
• Voltage Monitoring
• Battery Charging Circuits

Features

• Programmable Output Voltage: 2.5V to 36V
• Low Dynamic Output Impedance
• Sink Current Capability: 1mA to 100mA
• Temperature Compensated for a Stable Operating Range
• Typical Equivalent Full Range Temperature Coefficient: 14 ppm/°C
• Low Output Noise

Benefits

• High Precision Voltage Regulation: Provides a highly accurate and stable voltage reference for critical applications.
• Adjustable Output Voltage: Enables flexibility in circuit design by allowing the user to set the desired output voltage using external resistors.
• Wide Operating Voltage Range: Compatible with a wide range of input voltages, making it suitable for diverse power supply designs.
• Excellent Temperature Stability: Maintains stable performance even under varying temperature conditions, ensuring consistent operation.
• Cost-Effective Solution: Offers a cost-effective and reliable solution for precise voltage regulation.

Additional Details

The TL431CSF is typically available in a surface-mount package (such as SOT-23 or similar). Its functionality depends on external resistors to define the output voltage. The formula for calculating the output voltage is: Vout = Vref * (1 + R1/R2), where Vref is the internal reference voltage (approximately 2.5V), and R1 and R2 are the external resistors. Selecting appropriate tolerance resistors is important for optimal performance.

The low dynamic output impedance characteristic contributes to excellent load regulation, ensuring a stable output voltage even when the load current changes. For detailed specifications, application guidelines, and recommended operating conditions, consult the manufacturer's datasheet provided by TAEJIN / HTC Korea.