Overview
The TL431AQDBZTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431AQDBZTG4 offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various power supply and regulation applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBZ) | - |
| Pins | 3 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Reference Voltage Tolerance at 25°C | 1% | - |
| Adjustable Output Voltage | Vref to 36V | V |
| Typical Output Impedance | 0.2Ω | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Typical Temperature Drift | 9mV (0°C to 70°C), 14mV (−40°C to 125°C) | mV |
Key Features
- Programmable output voltage up to 36V with two external resistors.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Three different reference voltage tolerances: 0.5%, 1%, and 2%.
- Operation from −40°C to 125°C, making it suitable for various environmental conditions.
- Active output circuitry with a sharp turn-on characteristic, ideal for replacing Zener diodes.
- Qualified according to AEC-Q100 (grade 1) for automotive applications.
Applications
- On-board regulation and voltage monitoring.
- Adjustable power supplies and switching power supplies.
- Precision current limiter and precision constant current sink.
- Isolated feedback loop for Switch Mode Power Supplies (SMPS).
- Automotive, commercial, and military applications due to its wide temperature range and stability.
Q & A
- What is the TL431AQDBZTG4 used for? The TL431AQDBZTG4 is used as an adjustable precision shunt regulator, often replacing Zener diodes in various power supply and regulation applications.
- What is the adjustable output voltage range of the TL431AQDBZTG4? The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the reference voltage tolerances available for the TL431AQDBZTG4? The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the operating temperature range of the TL431AQDBZTG4? The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431AQDBZTG4? The typical output impedance is 0.2Ω.
- What are the sink-current capabilities of the TL431AQDBZTG4? The device can sink currents from 1mA to 100mA.
- Is the TL431AQDBZTG4 suitable for automotive applications? Yes, it is qualified according to AEC-Q100 (grade 1) and recommended for use in automotive applications.
- What package type is the TL431AQDBZTG4 available in? The device is available in the SOT-23 (DBZ) package.
- What are some common applications of the TL431AQDBZTG4? Common applications include on-board regulation, adjustable power supplies, switching power supplies, and precision current limiting.
- How does the TL431AQDBZTG4 handle temperature drift? The device has a typical temperature drift of 9mV (0°C to 70°C) and 14mV (−40°C to 125°C).
