TLV431A

The TLV431A series are precision low voltage shunt regulators that are programmable over a wide voltage range of 1.24 V to 16 V. These series feature a guaranteed reference accuracy of ±1.0% at 25°C and ±2.0% over the entire industrial temperature range of 40°C to 85°C. These devices exhibit a sharp low current turnon characteristic with a low dynamic impedance of 0.20 over an operating current range of 100 A to 20 mA. This combination of features of the TLV431A makes this series an excellent replacement for zener diodes in numerous applications circuits that require a precise reference voltage. When combined with an optocoupler, the TLV431A can be used as an error amplifier for controlling the feedback loop in isolated low output voltage (3.0 V to 3.3 V) switching power supplies. These devices are available in economical TSOP5 and TO92 packages.