ON Semiconductor TLV431ALPRA Adjustable Precision Shunt Regulator

The TLV431ALPRA from ON Semiconductor is a three-terminal, adjustable shunt regulator with specified thermal stability over a full operation range. This product features a low output voltage, which can be set to any value between V<sub>REF (approximately 1.24 volts) and 6 volts with two external resistors. These regulators have a typical dynamic output impedance of 0.22 ohms. The active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications such as onboard regulation, adjustable power supplies, and switching power supplies.

The TLV431ALPRA is offered in a three-pin SOT-89 surface-mount package, which ensures compactness and minimal footprint on circuit boards. This package is ideal for automated assembly processes, and its lead-free design is compliant with current environmental standards, promoting sustainability.

Key features of the TLV431ALPRA include a low reference voltage of 1.24V, low operational cathode current between 0.4 mA to 100 mA, and a typical temperature stability of ±0.5%. These characteristics make the device highly versatile, suitable for precision voltage regulation and well-suited for battery-powered applications where energy efficiency is paramount.

The device also boasts excellent thermal stability and a wide operating temperature range, ensuring reliable performance under varying environmental conditions. Its fast turn-on response and sharp regulation capabilities make it an excellent choice for use in feedback control loops within power supply systems.

In summary, the ON Semiconductor TLV431ALPRA adjustable precision shunt regulator is a robust, versatile component designed for applications requiring a high level of precision and stability. Its ease of use, combined with its small form factor, makes it an excellent choice for engineers and designers looking to create compact, efficient, and reliable power management solutions.