8.1 Overview

TLVH431B-EP is a low power counterpart to TL431, having lower reference voltage (1.24 V versus 2.5 V) for lower voltage adjustability and lower minimum cathode current (I_k(min) = 200 µA versus 1 mA). Like TL431, TLVH431B-EP is used in conjunction with its key components to behave as a single voltage reference, error amplifier, voltage clamp or comparator with integrated reference.

TLVH431B-EP is also a higher voltage counterpart to TLV431, with cathode voltage adjustability from 1.24 V to 18 V, 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, > 200 µA (I_min(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.

The reference voltage initial tolerance (at 25°C) is 0.5% and these devices are characterized for operation from –55°C to 125°C.