The Texas Instruments TL431QPK is a precision programmable reference that is designed to offer a reliable solution for voltage regulation in a wide array of electronic applications. This versatile device can be used as a replacement for zener diodes in many applications due to its higher stability and precision. The TL431QPK is an adjustable shunt regulator with a voltage range of 2.495 V to 36 V and can source up to 100 mA of current, making it a flexible choice for various circuit designs.

Key Features

• Voltage Range: The TL431QPK can be programmed from 2.495 V to 36 V with two external resistors, offering designers flexibility in setting the desired voltage level.
• High Accuracy: With a typical temperature stability of only 50 ppm/°C over the entire temperature range, the device ensures consistent performance and precise voltage control.
• Low Output Noise: It features a low output noise, which is essential for sensitive electronics, ensuring minimal interference with other components.
• Sink Current Capability: The device can source up to 100 mA, which is sufficient for a variety of applications, including power supply regulation and voltage referencing.
• Package Options: The TL431QPK is available in multiple package options, including the small-outline transistor (SOT-89) that is suitable for space-constrained applications.

Applications

The TL431QPK is suitable for a range of applications, including:

• Adjustable voltage and current regulators
• Voltage monitoring in battery chargers, power supplies, and other electronics
• Precision current limiters
• Switching power supplies
• Driver for optocouplers in power supplies

Quality and Reliability

Texas Instruments is known for its commitment to quality and reliability, and the TL431QPK is no exception. It is designed to meet the stringent requirements of industrial and commercial applications, ensuring long-term stability and performance.

Whether you are designing a new power supply or looking to enhance the stability of an existing application, the Texas Instruments TL431QPK provides a dependable and flexible solution that can be tailored to meet your specific needs.