The LMV431, 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.
● Low-Voltage Operation/Wide Adjust Range
●(1.24 V/30 V)
● 0.5% Initial Tolerance (LMV431B)
● Temperature Compensated for Industrial
●Temperature Range (39 PPM/°C for
●the LMV431AI)
● Low Operation Current (55 µA)
● Low Output Impedance (0.25 Ω)
● Fast Turn-On Response
● Low Cost
