The TL431IDRG4 from Texas Instruments is a three-terminal adjustable shunt regulator with specified thermal stability over applicable automotive, commercial, and military temperature ranges. This versatile device acts as a precision voltage reference and a regulator, providing excellent temperature stability and output current handling capability up to 100 mA. The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V with two external resistors.

Key Features

• Adjustable Output Voltage: Range from 2.495 V to 36 V with two external resistors.
• High Accuracy: 0.5% tolerance on reference voltage at 25°C (Grade A).
• Low Output Noise: It offers excellent stability and low noise, suitable for precision applications.
• Wide Operating Temperature Range: Suitable for automotive, commercial, and military applications.
• Sink Current Capability: Capable of sourcing current up to 100 mA.
• Surface-Mount Package: Supplied in a small outline integrated circuit (SOIC) package for easy PCB mounting.

Applications

The TL431IDRG4 is highly versatile and can be used in a variety of applications, including:

• Adjustable voltage and current regulation
• Precision voltage reference in power supplies
• Switching power supply control
• Analog-to-digital and digital-to-analog converters
• Battery chargers
• Motor control circuits

Reliability and Performance

Designed with reliability in mind, the TL431IDRG4 is a trusted component in critical systems. Its performance is characterized for operation from −40°C to 125°C, ensuring dependable function under a wide range of conditions. The device's low dynamic output impedance, combined with its fast turn-on response, provides excellent transient response characteristics, making it suitable for voltage regulation applications requiring high precision and rapid response to load changes.