Overview
The LMV431AIM5X/NOPB from Texas Instruments is a precision 1.24V adjustable shunt regulator. This component is part of the LMV431 series, which includes the LMV431, LMV431A, and LMV431B, each offering different initial tolerances. The LMV431AIM5X/NOPB is specifically designed for industrial temperature ranges and is packaged in a 5-pin SOT-23 format. It is known for its low-voltage operation, wide adjust range, and temperature compensation, making it suitable for various applications requiring zener diode type performance at low voltages.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Reference Voltage (VREF) | VZ = VREF, IZ = 10mA | 1.222 | 1.24 | 1.258 | V |
| Operating Temperature Range | -40°C | 85°C | °C | ||
| Cathode Voltage Range | VREF to 30V | 1.24V | 30V | V | |
| Cathode Current Range | 0.1mA | 15mA | mA | ||
| Maximum Input Voltage | 35V | V | |||
| Dynamic Output Impedance (rZ) | VZ = VREF, IZ = 0.1mA to 15mA | 0.25Ω | 0.4Ω | Ω | |
| Minimum Cathode Current for Regulation (IZ(MIN)) | VZ = VREF | 55µA | 80µA | µA | |
| Off-State Current (IZ(OFF)) | VZ = 6V, VREF = 0V | 0.001µA | 0.1µA | µA | |
| Lead Temperature (Soldering, 10 sec.) | 265°C | °C | |||
| Internal Power Dissipation (TO92/SOT23-5 Package) | 0.78W / 0.28W | W |
Key Features
- Low-Voltage Operation/Wide Adjust Range: The LMV431AIM5X/NOPB operates from 1.24V to 30V, making it versatile for various applications.
- Temperature Compensation: It is temperature compensated for industrial temperature ranges, with a temperature coefficient of 39 PPM/°C for the LMV431AI.
- Low Operation Current: The device has a low operation current of 55 µA, which is beneficial for power-sensitive designs.
- Low Output Impedance: The dynamic output impedance is as low as 0.25 Ω, ensuring stable voltage regulation.
- Fast Turn-On Response: It features a fast turn-on response, which is crucial for applications requiring quick voltage stabilization.
- Low Cost: The LMV431AIM5X/NOPB offers competitive pricing while maintaining high performance standards.
Applications
- Shunt Regulator: It can be used as a precision shunt regulator in various voltage regulation circuits.
- Series Regulator: The device can be part of a series regulator configuration to provide stable output voltages.
- Current Source or Sink: It can function as a current source or sink due to its adjustable nature and low output impedance.
- Voltage Monitor: The LMV431AIM5X/NOPB can be used as a voltage detector in monitoring circuits.
- Error Amplifier: It is suitable for use as an error amplifier in switching regulators and other feedback control systems.
- Low Drop-Out Regulator: It can be used to create a 3V to 2.7V low drop-out regulator.
Q & A
- What is the reference voltage of the LMV431AIM5X/NOPB?
The reference voltage (VREF) is 1.24V, with a tolerance range of 1.222V to 1.258V at 25°C.
- What is the operating temperature range of the LMV431AIM5X/NOPB?
The operating temperature range is from -40°C to +85°C for the industrial version.
- What is the maximum cathode voltage for the LMV431AIM5X/NOPB?
The maximum cathode voltage is 30V.
- What is the dynamic output impedance of the LMV431AIM5X/NOPB?
The dynamic output impedance (rZ) is between 0.25Ω and 0.4Ω.
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation (IZ(MIN)) is between 55µA and 80µA.
- What is the off-state current of the LMV431AIM5X/NOPB?
The off-state current (IZ(OFF)) is between 0.001µA and 0.1µA.
- Can the LMV431AIM5X/NOPB be used in high-temperature environments?
Yes, it is designed to operate in industrial temperature ranges up to 85°C.
- Is the LMV431AIM5X/NOPB RoHS compliant?
Yes, the LMV431AIM5X/NOPB is RoHS compliant, adhering to EU regulations.
- What are some common applications of the LMV431AIM5X/NOPB?
Common applications include shunt regulators, series regulators, current sources or sinks, voltage monitors, and error amplifiers in switching regulators.
- How does the LMV431AIM5X/NOPB handle capacitive loads?
The device is typically stable with capacitive loads greater than 10nF and less than 50pF.
