Overview
The TL431ACDBVR 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, making them suitable for automotive, commercial, and military applications. The device allows for adjustable output voltage between Vref (approximately 2.5V) and 36V using two external resistors. It features active output circuitry with a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various applications.
Key Specifications
| Specification | Value |
|---|---|
| Package | SOT-23 (DBV), 5 pins |
| Operating Temperature Range | 0°C to 70°C (C grade), –40°C to 85°C (I grade), –40°C to 125°C (Q grade) |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref to 36V |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
Key Features
- Adjustable output voltage: Vref to 36V using two external resistors
- Low output noise
- Typical output impedance of 0.2Ω
- Sink-current capability: 1mA to 100mA
- Operation from –40°C to 125°C depending on the grade
- Low output drift versus temperature for good stability
- Active output circuitry with a very sharp turn-on characteristic
Applications
- On-board regulation
- Adjustable power supplies
- Switching power supplies
- Replacement for Zener diodes in many applications
- Automotive, commercial, and military temperature ranges
Q & A
- What is the TL431ACDBVR?
The TL431ACDBVR is a three-terminal adjustable shunt regulator produced by Texas Instruments. - What is the adjustable output voltage range of the TL431ACDBVR?
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 TL431ACDBVR?
The device operates from 0°C to 70°C (C grade), –40°C to 85°C (I grade), and –40°C to 125°C (Q grade). - What is the typical output impedance of the TL431ACDBVR?
The typical output impedance is 0.2Ω. - What is the sink-current capability of the TL431ACDBVR?
The sink-current capability ranges from 1mA to 100mA. - What are the common applications of the TL431ACDBVR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and as a replacement for Zener diodes. - How does the TL431ACDBVR differ from the TL432?
The TL431 and TL432 devices have the same functionality and electrical specifications but differ in pinouts for the DBV, DBZ, and PK packages. - What are the reference voltage tolerances for the TL431ACDBVR?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C. - Does the TL431ACDBVR have low output noise?
Yes, the TL431ACDBVR features low output noise. - What is the typical temperature drift of the TL431ACDBVR?
The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
