Overview
The LM431BIM3X is an adjustable precision Zener shunt regulator produced by Texas Instruments (formerly National Semiconductor). This device is known for its high temperature stability and programmable output voltage, making it a versatile component for various applications. The LM431BIM3X is available in a space-saving SOT-23 package, which is ideal for space-critical designs.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Cathode Voltage | - | - | 37 | V |
| Continuous Cathode Current | -10 | - | 150 | mA |
| Reference Input Current | 10 | - | - | mA |
| Operating Temperature (Industrial) | -40 | - | 85 | °C |
| Storage Temperature | -65 | - | 150 | °C |
| Internal Power Dissipation (SOT-23 package) | - | - | 0.28 | W |
Key Features
- Average Temperature Coefficient: 50 ppm/°C
- Temperature Compensated for Operation Over the Full Temperature Range
- Programmable Output Voltage: 2.5 V to 36 V
- Fast Turn-on 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 LM431BIM3X used for?
The LM431BIM3X is used as an adjustable precision Zener shunt regulator, providing a stable voltage reference in various applications.
- What is the output voltage range of the LM431BIM3X?
The output voltage can be set between 2.5 V and 36 V using external resistors.
- What are the available packages for the LM431BIM3X?
The LM431BIM3X is available in the SOT-23 package, among others like SOIC-8 and TO-92.
- What is the minimum and maximum operating current for the LM431BIM3X?
The minimum operating current is 1 mA, and the maximum operating current is 100 mA.
- How is the output voltage of the LM431BIM3X adjusted?
The output voltage is adjusted by selecting two external resistors that act as a voltage divider network.
- What is the average temperature coefficient of the LM431BIM3X?
The average temperature coefficient is 50 ppm/°C.
- Is the LM431BIM3X suitable for high-temperature applications?
Yes, it is temperature compensated for operation over the full temperature range.
- What are some common applications of the LM431BIM3X?
Common applications include adjustable voltage or current power supplies, voltage monitoring, current source and sink circuits, and precision reference circuits.
- Does the LM431BIM3X require any external components for operation?
Yes, it requires at least one external resistor between the cathode and the input voltage to set the input current.
- Is the LM431BIM3X still in production?
No, the LM431 has been discontinued by Texas Instruments, but existing stock may still be available from distributors.
