STMicroelectronics TL431AIYDT Precision Shunt Voltage Reference

The TL431AIYDT is a versatile, precision voltage reference from STMicroelectronics, renowned for its high stability and reliability across a wide range of applications. This three-terminal adjustable shunt regulator operates as a temperature-compensated zener diode, but with a low output impedance and better stability over temperature and time. It is an essential component for power supply and voltage regulation solutions, providing a reference voltage that can be set to any value between Vref (approximately 2.5V) and 36 volts with the use of two external resistors.

With its adjustable output voltage and sharp turn-on characteristics, the TL431AIYDT is an excellent choice for voltage monitoring and control in switching power supplies, linear regulators, and charge controllers. It is also widely used in battery chargers, motor drivers, and adjustable voltage references for instrumentation and data acquisition systems.

Key features of the TL431AIYDT include:

• Output Voltage Range: Adjustable from 2.495 to 36 volts, providing flexibility for various design requirements.
• Reference Voltage Tolerance: ±0.5% at 25°C, and ±1% over the full temperature range, ensuring precise voltage regulation for critical applications.
• Low Operational Current: With an operational current range from 1 mA to 100 mA, this device is suitable for low-power applications and helps to maintain energy efficiency.
• Temperature Stability: Excellent thermal stability over a full operating temperature range of -40°C to +105°C, making it reliable in a variety of environmental conditions.
• Dynamic Impedance: Low dynamic output impedance of 0.22 ohms, providing stable voltage under load variations.

The TL431AIYDT is available in a small outline package (SOT-89) which is ideal for space-constrained applications. Its robust design includes protection features such as overcurrent limiting, making it a durable choice for demanding settings. With its ability to act as a replacement for zener diodes in many applications, the TL431AIYDT offers designers a high degree of versatility and performance assurance.

Whether you're designing a power supply or looking to build a precise voltage regulation system, the TL431AIYDT from STMicroelectronics provides a reliable and flexible solution that can meet a wide array of technical requirements.