Overview
The LM431BCM3X/NOPB is an adjustable precision shunt voltage regulator produced by Texas Instruments. This device is part of the LM431 series, known for its high precision and temperature stability. The LM431BCM3X/NOPB is specifically packaged in a SOT-23 (DBZ) package, making it suitable for applications where space is limited. It offers a programmable output voltage range from 2.5 V to 36 V, achieved through the use of external resistors. This regulator is designed to provide low-output noise, fast turn-on response, and low dynamic output impedance, making it an excellent replacement for many Zener diode applications.
Key Specifications
| Parameter | Min | Unit | ||
|---|---|---|---|---|
| Cathode Voltage | - | - | 37 | V |
| Reference Voltage (VREF) | 2.485 | 2.5 | 2.51 | 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
- Adjustable Output Voltage: The output voltage can be set to any level greater than 2.5 V up to 36 V using external resistors.
- Temperature Stability: Ensured temperature stability over the entire temperature range with an average temperature coefficient of 50 ppm/°C.
- Fast Turn-On Response: Sharp turn-on characteristics make it an excellent replacement for many Zener diode applications.
- Low-Output Noise: Provides low noise output, enhancing the overall performance of the circuit.
- Low Dynamic Output Impedance: Ensures stable output voltage under varying load conditions.
- Space-Saving Packages: Available in SOIC-8, SOT-23, and TO-92 packages to meet small footprint requirements.
Applications
- Adjustable Voltage or Current Linear and Switching Power Supplies: Suitable for power supply designs requiring adjustable voltage or current regulation.
- Voltage Monitoring: Can be used in circuits that require precise voltage monitoring.
- Current Source and Sink Circuits: Ideal for applications needing precise current sources or sinks.
- Circuits Requiring Precision References: Provides a stable reference voltage essential in various precision circuits.
- Zener Diode Replacements: Offers superior performance compared to traditional Zener diodes.
Q & A
- What is the LM431BCM3X/NOPB used for?
The LM431BCM3X/NOPB is used as an adjustable precision shunt voltage regulator, often replacing Zener diodes in various applications.
- What is the output voltage range of the LM431BCM3X/NOPB?
The output voltage can be set to any level greater than 2.5 V up to 36 V using external resistors.
- What are the key features of the LM431BCM3X/NOPB?
Key features include adjustable output voltage, temperature stability, fast turn-on response, low-output noise, and low dynamic output impedance.
- In what packages is the LM431 available?
The LM431 is available in SOIC-8, SOT-23, and TO-92 packages.
- What is the operating temperature range for the LM431BCM3X/NOPB?
The operating temperature range is from -40°C to 85°C for the industrial grade.
- How is the output voltage adjusted in the LM431BCM3X/NOPB?
The output voltage is adjusted using two external resistors that act as a voltage divider network.
- What are some common applications of the LM431BCM3X/NOPB?
Common applications include adjustable voltage or current power supplies, voltage monitoring, current source and sink circuits, and precision reference circuits.
- What is the internal power dissipation for the SOT-23 package?
The internal power dissipation for the SOT-23 package is 0.28 W.
- Is the LM431BCM3X/NOPB RoHS compliant?
Yes, the LM431BCM3X/NOPB is RoHS compliant and free of Sb/Br.
- What is the storage temperature range for the LM431BCM3X/NOPB?
The storage temperature range is from -65°C to 150°C.
