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.
|Part number||Order||Reference voltage||VO (V)||VO adj (Min) (V)||VO adj (Max) (V)||Initial accuracy (Max) (%)||Temp coeff (Max) (ppm/ degree C)||Rating||Operating temperature range (C)||Iz for regulation (Min) (uA)||Iout/Iz (Max) (mA)||Package Group||Iref (uA)||I I(dev) (uA)|
-40 to 85
0 to 70
SOT-23 | 3
SOT-23 | 5
TO-92 | 3