Overview
The LMV431BIMFX, produced by Texas Instruments, is a precision shunt regulator designed for applications requiring adjustable voltage regulation up to 30 V. This component is part of the LMV431 series, which includes LMV431A and LMV431B variants, each offering different initial tolerances. The LMV431BIMFX is particularly noted for its 0.5% initial tolerance, making it suitable for precision applications. It operates similarly to a non-inverting operational amplifier configuration, where negative feedback from the cathode to the adjust pin controls the cathode voltage. This device is widely used in low-dropout regulators, error amplifiers in switch-mode power supplies, and as voltage detectors.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Voltage | 1.24 | V | Adjustable up to 30 V |
| Initial Tolerance | 0.5 | % | LMV431B |
| Operating Current | 55 | μA | |
| Output Impedance | 0.25 | Ω | |
| Temperature Coefficient | 39 | ppm/°C | |
| Package | SOT-23 |
Key Features
- Low voltage operation with a wide adjustment range from 1.24 V to 30 V.
- High initial accuracy of 0.5% for precise voltage regulation.
- Low operating current of 55 μA enhances power efficiency.
- Low output impedance of 0.25 Ω ensures stable performance.
- Temperature compensated for industrial temperature ranges.
Applications
The LMV431BIMFX is versatile in its applications, primarily used in low-dropout regulators for 3 V to 27 V systems, error amplifiers in 3 V offline switch-mode power supplies, and as voltage detectors. Its stability with capacitive loads ranging from 10 nF to 50 pF makes it ideal for precision voltage regulation in various electronic devices.
Q & A
What is the output voltage range of the LMV431BIMFX?
The output voltage can be adjusted from 1.24 V up to 30 V.
What is the initial tolerance of the LMV431BIMFX?
It has an initial tolerance of 0.5%.
Can the LMV431BIMFX operate in industrial temperature ranges?
Yes, it is temperature compensated for industrial temperature ranges.
What is the typical operating current of the LMV431BIMFX?
The typical operating current is 55 μA.
What type of package does the LMV431BIMFX come in?
It comes in an SOT-23 package.
Is the LMV431BIMFX suitable for use in low-dropout regulators?
Yes, it is widely used in low-dropout regulators for systems from 3 V to 27 V.
What is the output impedance of the LMV431BIMFX?
The output impedance is 0.25 Ω.
Can the LMV431BIMFX be used as a voltage detector?
Yes, it can function as a voltage detector in various applications.
What is the temperature coefficient of the LMV431BIMFX?
The temperature coefficient is 39 ppm/°C.
Is the LMV431BIMFX stable with capacitive loads?
Yes, it remains stable with capacitive loads between 10 nF and 50 pF.
