Overview
The TL431BIDBVT is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 device family, known for their specified thermal stability over a wide range of temperatures, including automotive, commercial, and military environments. These devices are designed to provide a programmable reference voltage, making them versatile for various applications such as on-board regulation, adjustable power supplies, and switching power supplies. The TL431BIDBVT offers high precision and stability, making it an excellent replacement for Zener diodes in many scenarios.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance (at 25°C) | 0.5% | - |
| Adjustable Output Voltage Range | Vref (approximately 2.5V) to 36V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω (typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-23 (DBV) | - |
| Pins | 3 | - |
Key Features
- High precision reference voltage with tolerances of 0.5%, 1%, and 2% for B, A, and standard grades, respectively.
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Operation over a wide temperature range from -40°C to 125°C.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- AEC-Q100 qualified (grade 1) for automotive applications.
- Active output circuitry providing a sharp turn-on characteristic, making it suitable for replacing Zener diodes.
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 and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431BIDBVT?
The TL431BIDBVT is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431BIDBVT?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the temperature ranges for the TL431BIDBVT?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431BIDBVT?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BIDBVT?
The sink-current capability ranges from 1 mA to 100 mA.
- Is the TL431BIDBVT AEC-Q100 qualified?
Yes, the TL431BIDBVT is AEC-Q100 qualified (grade 1) for automotive applications.
- What are some common applications of the TL431BIDBVT?
Common 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.
- Can the TL431BIDBVT replace Zener diodes in some applications?
Yes, the TL431BIDBVT can replace Zener diodes due to its active output circuitry and sharp turn-on characteristic.
- What is the package type of the TL431BIDBVT?
The TL431BIDBVT is packaged in a SOT-23 (DBV) package.
- How many pins does the TL431BIDBVT have?
The TL431BIDBVT has 3 pins.
