ON Semiconductor TL431CDR2 Precision Programmable Reference

The ON Semiconductor TL431CDR2 is a versatile and precision programmable voltage reference device, designed to offer both flexibility and reliability for a wide range of applications. This three-terminal adjustable shunt regulator is commonly utilized in power supplies, battery chargers, and voltage monitoring systems, thanks to its ability to maintain a stable reference voltage over a broad range of operating conditions.

Key Features

• Programmable Output Voltage: The TL431CDR2 can be programmed from the reference voltage of 2.495V up to 36V with two external resistors, providing designers with a high level of customization for their specific circuit requirements.
• High Accuracy: With a typical temperature stability of only 50 ppm/°C over the entire temperature range, and an initial accuracy of 0.5%, this device ensures precise voltage regulation for critical applications.
• Low Output Noise: It features low output noise, which is essential for sensitive electronics where noise can significantly impact performance.
• Low Dynamic Output Impedance: The dynamic output impedance of 0.2 ohms combined with its fast turn-on response provides excellent transient response characteristics.
• Wide Operating Current Range: The TL431CDR2 operates with a current range from 1 mA to 100 mA, catering to a broad spectrum of load conditions.

Applications

• Switching power supplies
• Linear power supplies
• Battery chargers
• Adjustable voltage references
• Current limiters

The device is offered in a compact surface-mount package, specifically the SOT-23-3, which is suitable for automated assembly processes and helps in minimizing the PCB space required. Its operating temperature range from -40°C to +85°C ensures that it can perform reliably in a variety of environments.

With its combination of features, the ON Semiconductor TL431CDR2 is an excellent choice for designers who require a stable and adjustable voltage reference with high accuracy and low noise. Its ease of use and wide application range make it a go-to solution for maintaining precise voltage levels in a variety of electronic systems.