The TLV431A series low-voltage adjustable Voltage Reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24V) and 6V with two external resistors. This device operates from a lower voltage (1.24V) than the widely used TL431 and TL1431 shunt-regulator reference. When used with an optocoupler, the TLV431 device is an ideal voltage reference in isolated feedback circuits for 3 to 3.3V switching-mode power supplies. This device has a typical output impedance of 0.25R. Active output circuitry provides a very sharp turn-ON characteristic, making them excellent replacements for low-voltage zener diodes in many applications, including on-board regulation and adjustable power supplies.

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