Overview
The TL431QDBVR is a precision adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its specified thermal stability and wide range of applications. The TL431QDBVR allows for adjustable output voltage between approximately 2.5V (Vref) and 36V, set using two external resistors. It features active output circuitry that provides a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various power management scenarios, including onboard regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBV), SC-74A, SOT-753 |
| Pins | 5 |
| Operating Temperature Range (°C) | -40 to 125 |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | 2.495V 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 from approximately 2.5V to 36V using two external resistors.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability ranging from 1mA to 100mA.
- Active output circuitry providing a sharp turn-on characteristic, making it suitable for replacing Zener diodes.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Operation from -40°C to 125°C, making it suitable for automotive, commercial, and military applications.
Applications
- Power Management: Onboard regulation, adjustable power supplies, and switching power supplies.
- Automotive: Suitable for various automotive applications due to its wide temperature range and stability.
- Aerospace and Defence: Used in military and defence applications requiring high reliability and thermal stability.
- Commercial: Applicable in commercial electronics requiring adjustable voltage regulation.
Q & A
- What is the TL431QDBVR used for? The TL431QDBVR is used as a precision adjustable shunt regulator, often replacing Zener diodes in various power management applications.
- What is the adjustable output voltage range of the TL431QDBVR? The output voltage can be set between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431QDBVR? The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431QDBVR? The typical output impedance is 0.2Ω.
- What are the sink-current capabilities of the TL431QDBVR? The device can handle sink currents from 1mA to 100mA.
- What are the common applications of the TL431QDBVR? Common applications include onboard regulation, adjustable power supplies, switching power supplies, automotive, aerospace, and defence.
- What are the different grades of the TL431QDBVR based on reference voltage tolerance? The device is available in B, A, and standard grades with tolerances of 0.5%, 1%, and 2% respectively at 25°C.
- What is the typical temperature drift of the TL431QDBVR? The typical temperature drift is 6mV for C temp and 14mV for I and Q temps.
- Is the TL431QDBVR suitable for high-temperature applications? Yes, it is suitable for high-temperature applications with an operating range from -40°C to 125°C.
- What package types are available for the TL431QDBVR? The device is available in SOT-23 (DBV), SC-74A, and SOT-753 packages.
