This standard device has proven ubiquity and versatility across a wide range of applications, ranging from power to signal path. This is due to its key components containing an accurate voltage reference and op amp, which are very fundamental analog building blocks. TL43xLI is used in conjunction with it's key components to behave as a single voltage reference, error amplifier, voltage clamp or comparator with integrated reference.
TL43xLI can be operated and adjusted to cathode voltages from 2.495V to 36V, making this part optimum for a wide range of end equipments in industrial, auto, telecom and computing. In order for this device to behave as a shunt regulator or error amplifier, >1mA (Imin(max)) must be supplied in to the cathode pin. Under this condition, feedback can be applied from the Cathode and Ref pins to create a replica of the internal reference voltage.
Various reference voltage options can be purchased with initial tolerances (at 25°C) of 0.5%, and 1%. These reference options are denoted by B (0.5%) and A (1.0%) after the TL431LI or TL432LI. TL431LI and TL432LI are both functionally the same, but have separate pinout options.
The TL43xLIxC devices are characterized for operation from 0°C to 70°C, the TL43xLIxI devices are characterized for operation from –40°C to 85°C, and the TL43xLIxQ devices are characterized for operation from –40°C to 125°C.