Overview
The LMV431AIMFX/NOPB is a low-voltage, adjustable precision shunt regulator produced by Texas Instruments. This device is part of the LMV431 family, which includes the LMV431, LMV431A, and LMV431B. It is designed to operate at a low voltage of 1.24 V and can be adjusted up to 30 V, making it versatile for various applications requiring precision voltage regulation.
The LMV431AIMFX/NOPB is particularly notable for its low operation current, fast turn-on response, and low output impedance. It is suitable for a wide range of applications, including shunt regulators, series regulators, current sources or sinks, and voltage monitors.
Although the LMV431 series has been discontinued by Texas Instruments, it remains relevant for existing designs and legacy systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature (Industrial) | -40 | 85 | °C | |
| Operating Temperature (Commercial) | 0 | 70 | °C | |
| Lead Temperature (Soldering, 10 sec.) | 265 | °C | ||
| Internal Power Dissipation (TO-92 Package) | 0.78 | W | ||
| Internal Power Dissipation (SOT-23 Package) | 0.28 | W | ||
| Cathode Voltage | 35 | V | ||
| Continuous Cathode Current | -30 | 30 | mA | |
| Reference Input Current | -0.05 | 3 | mA | |
| Initial Tolerance (LMV431B) | 0.5% | |||
| Minimum Cathode Current for Regulation | 55 | 80 | µA | |
| Off-State Current | 0.001 | 0.1 | µA | |
| Dynamic Output Impedance | 0.25 | 0.4 | Ω |
Key Features
- Low-voltage operation with a reference voltage of 1.24 V and adjustable up to 30 V.
- Low operation current of 55 µA.
- Fast turn-on response.
- Low output impedance of 0.25 Ω to 0.4 Ω.
- Temperature compensated for industrial temperature range with a temperature coefficient of 39 PPM/°C for the LMV431AI.
- Stable with capacitive loads greater than 10 nF and less than 50 pF.
- Available in SOT-23 and TO-92 packages.
- Low cost and competitive pricing.
Applications
- Shunt Regulator: Used in applications requiring precision voltage regulation.
- Series Regulator: Can be used in series regulator configurations.
- Current Source or Sink: Suitable for applications needing precise current control.
- Voltage Monitor: Can be used as a voltage detector.
- Error Amplifier: Used in 3 V off-line switching regulators.
- Low Dropout N-Channel Series Regulator: Useful in low dropout regulator designs.
- 3-V Off-Line Switching Regulator: Part of the circuitry in off-line switching regulators.
Q & A
- What is the reference voltage of the LMV431AIMFX/NOPB?
The reference voltage is 1.24 V.
- What is the adjustable voltage range of the LMV431AIMFX/NOPB?
The voltage can be adjusted up to 30 V.
- What is the typical operation current of the LMV431AIMFX/NOPB?
The typical operation current is 55 µA.
- What is the dynamic output impedance of the LMV431AIMFX/NOPB?
The dynamic output impedance ranges from 0.25 Ω to 0.4 Ω.
- What are the available packages for the LMV431AIMFX/NOPB?
The device is available in SOT-23 and TO-92 packages.
- Is the LMV431AIMFX/NOPB temperature compensated?
Yes, it is temperature compensated with a temperature coefficient of 39 PPM/°C for the LMV431AI.
- What are some common applications of the LMV431AIMFX/NOPB?
Common applications include shunt regulators, series regulators, current sources or sinks, and voltage monitors.
- Why has the LMV431 series been discontinued by Texas Instruments?
The LMV431 series has been discontinued, but it remains relevant for existing designs and legacy systems.
- What is the storage temperature range for the LMV431AIMFX/NOPB?
The storage temperature range is from -65°C to 150°C.
- What is the electrostatic discharge (ESD) rating for the LMV431AIMFX/NOPB?
The ESD rating is 2000 V (HBM) for all pins.
