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LM431ASF

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PROGRAMMABLE PRECISION SHUNT REGULATOR

         FEATURES

        - Programmable Output Voltage to 40V

- Guaranteed 0.5% Reference Voltage Tolerance

- Low (0.2 ohm Typ.) Dynamic Output Impedance

- Cathode Current Range(Continuous) - 100 ~ 150 mA

- Equivalent Full Range Temperature Coefficient of 50ppm/°C

- Temperature Compensated For Operation Over Full Rate Operating Temperature Range

- Low Output Noise Voltage

- Fast Turn-on Response

- SOT-23 3L Package

         DESCRIPTION

        The LM431 is a three-terminal adjustable shunt regulator with specified thermal stability over applicable temperature VREF (Approx. 2.5V) and 40V with two external resistors. This device has a typical dynamic output impedance of 0.2ohm. Active output circuitry provides a very sharp turn-on characteristic, making this device excellent replacement for zener diodes in many applications. The LM431 is characterized for operation from -40°C to +125°C.


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