The TL431 and TL432 are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors (see Figure 17). These devices h***e a typical output impedance of 0.2 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices
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