Overview
The TL431BQDR is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high precision and thermal stability over a wide range of temperatures. The TL431BQDR is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) and is suitable for various applications, including automotive, commercial, and industrial environments. It offers adjustable output voltage from approximately 2.5V to 36V, making it versatile for different power supply and voltage regulation needs.
Key Specifications
| Specification | Value |
|---|---|
| Package | 8-Pin SOIC |
| Number of Pins | 8 |
| Mount | Surface Mount |
| Max Output Current | 100mA |
| Min Input Voltage | 2.495V |
| Max Input Voltage | 37V |
| Max Output Voltage | 36V |
| Tolerance | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Temperature Coefficient | 34ppm/°C |
| Cathode Current | 700µA |
| Lifecycle Status | Production |
| Min Operating Temperature | -40°C |
| Max Operating Temperature | 125°C |
| Output Impedance | 0.2Ω (Typical) |
| RoHS Compliance | Yes |
Key Features
- Adjustable output voltage from approximately 2.5V to 36V using two external resistors.
- High precision with initial tolerances of 0.5%, 1%, and 2% for B, A, and standard grades, respectively.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- Operation from -40°C to 125°C, suitable for automotive, commercial, and industrial environments.
Applications
The TL431BQDR is versatile and can be used in various applications, including:
- On-board voltage regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive systems requiring stable voltage references.
- Industrial and commercial power management systems.
Q & A
- What is the package type of the TL431BQDR?
The TL431BQDR is packaged in an 8-pin SOIC (Small Outline Integrated Circuit). - What is the adjustable output voltage range of the TL431BQDR?
The output voltage can be adjusted from approximately 2.5V to 36V. - What are the temperature ranges for the TL431BQDR?
The device operates from -40°C to 125°C. - What is the maximum output current of the TL431BQDR?
The maximum output current is 100mA. - Is the TL431BQDR RoHS compliant?
Yes, the TL431BQDR is RoHS compliant. - What are the typical applications of the TL431BQDR?
It is used in on-board voltage regulation, adjustable power supplies, switching power supplies, and in automotive and industrial systems. - How does the TL431BQDR compare to Zener diodes?
The TL431BQDR has active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications. - What are the different grades of the TL431BQDR based on tolerance?
The device is available in B, A, and standard grades with initial tolerances of 0.5%, 1%, and 2%, respectively. - What is the typical output impedance of the TL431BQDR?
The typical output impedance is 0.2Ω. - Is the TL431BQDR suitable for automotive applications?
Yes, it is suitable for automotive applications due to its temperature range and stability.
