Overview
The LM431AIM3X is a 3-terminal adjustable shunt regulator produced by Texas Instruments. Despite the confusion, it is not a product of National Semiconductor. This device is known for its high precision and temperature stability, making it an excellent replacement for many Zener diode applications. The LM431 can be programmed to output any voltage between 2.5 V and 36 V using two external resistors, which act as a voltage divider network. It is available in space-saving packages such as SOIC-8, SOT-23, and TO-92.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Range | 2.495 V to 37 V | V |
| Output Current | 100 mA | mA |
| Temperature Coefficient | ±50 ppm/°C | ppm/°C |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Types | SOIC-8, SOT-23, TO-92 | - |
| Mounting Type | Surface Mount | - |
| RoHS Compliance | Yes | - |
| Initial Accuracy | 0.5%, 1%, or 2% | % |
Key Features
- Average Temperature Coefficient of 50 ppm/°C
- Temperature Compensated for Operation Over the Full Temperature Range
- Programmable Output Voltage
- Fast Turnon Response
- Low-Output Noise
- Low-Dynamic Output Impedance
- Available in Space-Saving SOIC-8, SOT-23, and TO-92 Packages
Applications
- Adjustable Voltage or Current Linear and Switching Power Supplies
- Voltage Monitoring
- Current Source and Sink Circuits
- Circuits Requiring Precision References
- Zener Diode Replacements
Q & A
- What is the LM431AIM3X used for?
The LM431AIM3X is used as an adjustable precision Zener shunt regulator, often replacing traditional Zener diodes in various applications.
- What is the output voltage range of the LM431AIM3X?
The output voltage can be set between 2.495 V and 37 V using external resistors.
- What are the available package types for the LM431AIM3X?
The device is available in SOIC-8, SOT-23, and TO-92 packages.
- What is the operating temperature range of the LM431AIM3X?
The operating temperature range is from -40°C to 85°C.
- Is the LM431AIM3X RoHS compliant?
Yes, the LM431AIM3X is RoHS compliant.
- What is the typical temperature coefficient of the LM431AIM3X?
The typical temperature coefficient is ±50 ppm/°C.
- How is the output voltage of the LM431AIM3X adjusted?
The output voltage is adjusted using two external resistors that act as a voltage divider network.
- What are some common applications of the LM431AIM3X?
Common applications include adjustable voltage or current power supplies, voltage monitoring, current source and sink circuits, and circuits requiring precision references.
- What is the maximum output current of the LM431AIM3X?
The maximum output current is 100 mA.
- Is the LM431AIM3X suitable for high-precision applications?
Yes, the LM431AIM3X is suitable for high-precision applications due to its low output noise and low dynamic output impedance.
