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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMV431l;LMV431Al;LMV431B Low-Voltage (1.24V) Adj Precision Shunt Regs datasheet (Rev. G) | 22 Sep 2014 | |
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28 Jun 2019 |
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| Package | Pins | Download |
|---|---|---|
| SOT-23 (DBV) | 5 | View options |
| SOT-23 (DBZ) | 3 | View options |
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