Overview
The TL431CDBVT is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its specified thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431CDBVT allows for adjustable output voltage settings between the reference voltage (approximately 2.5V) and 36V using two external resistors. It features active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBV) | - |
| Pins | 5 | - |
| Operating Temperature Range | 0 to 70 | °C |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Typical Output Impedance | 0.2Ω | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade)
- Adjustable output voltage: Vref to 36V
- Operation from −40°C to 125°C
- Typical temperature drift: 6mV (C temp), 14mV (I temp, Q temp)
- Low output noise
- Typical output impedance: 0.2Ω
- Sink-current capability: 1mA to 100mA
Applications
- Rack server power
- Industrial AC/DC power supplies
- AC inverter and VF drives
- Servo drive control modules
- Notebook PC power adapter designs
- On-board regulation
- Adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431CDBVT?
The TL431CDBVT is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431CDBVT?
The output voltage can be set to any value between the reference voltage (approximately 2.5V) and 36V using two external resistors.
- What are the temperature ranges for the TL431CDBVT?
The device operates from −40°C to 125°C, with different grades characterized for specific temperature ranges (C: 0°C to 70°C, I: −40°C to 85°C, Q: −40°C to 125°C).
- What is the typical output impedance of the TL431CDBVT?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CDBVT?
The sink-current capability ranges from 1mA to 100mA.
- What are some common applications of the TL431CDBVT?
Common applications include rack server power, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431CDBVT compare to Zener diodes?
The TL431CDBVT has active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the different grades of the TL431CDBVT based on reference voltage tolerance?
The device is offered in three grades: B (0.5% tolerance), A (1% tolerance), and Standard (2% tolerance) at 25°C.
- What is the typical temperature drift of the TL431CDBVT?
The typical temperature drift is 6mV for C temperature grade and 14mV for I and Q temperature grades.
- Does the TL431CDBVT have low output noise?
Yes, the TL431CDBVT features low output noise.
