Overview
The TL431BCDBVR is a precision adjustable shunt regulator produced by Texas Instruments. This three-terminal device is part of the TL431 family, known for its thermal stability and wide operating temperature range. It is designed to provide a precise and adjustable output voltage, making it suitable for various power management applications. The TL431BCDBVR operates from -40°C to 125°C, ensuring reliability in diverse environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Case/Package | SOT-23 (DBV) | |
| Number of Pins | 3 | |
| Mount | Surface Mount | |
| Max Output Current | 100 mA | |
| Min Input Voltage | 2.495 V | |
| Max Input Voltage | 37 V | |
| Max Output Voltage | 36 V | |
| Tolerance | 0.5% (B grade) | |
| Temperature Coefficient | 34 ppm/°C (Typ) | |
| Cathode Current | 700 µA | |
| Operating Temperature Range | -40°C to 125°C | |
| Output Impedance | 0.2 Ω (Typ) | |
| RoHS Compliance | Yes |
Key Features
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
Applications
- Rack server power supplies.
- Industrial AC/DC power supplies.
- AC inverter and variable frequency (VF) drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
- On-board regulation, adjustable power supplies, and switching power supplies.
Q & A
- What is the operating temperature range of the TL431BCDBVR?
The TL431BCDBVR operates from -40°C to 125°C.
- What is the maximum output current of the TL431BCDBVR?
The maximum output current is 100 mA.
- How is the output voltage of the TL431BCDBVR adjusted?
The output voltage can be adjusted using two external resistors and can be set to any value between Vref (approximately 2.5 V) and 36 V.
- What is the typical output impedance of the TL431BCDBVR?
The typical output impedance is 0.2 Ω.
- Is the TL431BCDBVR RoHS compliant?
Yes, the TL431BCDBVR is RoHS compliant.
- What are the main applications of the TL431BCDBVR?
The main applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- What is the tolerance of the TL431BCDBVR at 25°C?
The tolerance is 0.5% for the B grade.
- What is the temperature coefficient of the TL431BCDBVR?
The temperature coefficient is 34 ppm/°C (Typ).
- Can the TL431BCDBVR replace Zener diodes in some applications?
Yes, the TL431BCDBVR can replace Zener diodes due to its sharp turn-on characteristic and low output noise.
- What is the packaging type for the TL431BCDBVR?
The TL431BCDBVR is packaged in SOT-23 (DBV) and is shipped in tape and reel packaging.
