LMV431

1.5%、低电压 1.24V 可调节精密并联稳压器 5-SOT-23 -40 to 85

The , LMV431A and LMV431B are precision 1.24 V shunt regulators capable of adjustment to 30 V. Negative feedback from the cathode to the adjust pin controls the cathode voltage, much like a non-inverting op amp configuration Refer to _Symbol and Functional Diagrams_. A two-resistor voltage divider terminated at the adjust pin controls the gain of a 1.24 V band-gap reference. Shorting the cathode to the adjust pin voltage follower provides a cathode voltage of a 1.24 V.

The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1%, and 0.5%, and functionally lend themselves to several applications that require zener diode type performance at low voltages. Applications include a 3 V to 2.7 V low drop-out regulator, an error amplifier in a 3 V off-line switching regulator and even as a voltage detector. These parts are typically stable with capacitive loads greater than 10 nF and less than 50 pF.

The LMV431, LMV431A and LMV431B provide performance at a competitive price.

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Low-Voltage Operation/Wide Adjust Range

1.24 V/30 V

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0.5% Initial Tolerance LMV431B

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Temperature Compensated for Industrial

Temperature Range 39 PPM/°C for

the LMV431AI

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Low Operation Current 55 µA

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Low Output Impedance 0.25 Ω

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Fast Turn-On Response

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Low Cost