Overview
The TL431QDBZRG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high precision and thermal stability. It is designed to operate over a wide temperature range, making it suitable for various applications including automotive, commercial, and military environments. The TL431QDBZRG4 offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBZ) |
| Pins | 3 |
| 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 | Vref (approximately 2.5V) to 36V |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
| Output Impedance | 0.2Ω (typical) |
| Sink-Current Capability | 1mA to 100mA |
| Output Noise | Low |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- High precision with reference voltage tolerances of 0.5%, 1%, and 2% at 25°C.
- Low output impedance of 0.2Ω (typical).
- Low output noise.
- Sink-current capability from 1mA to 100mA.
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Qualified according to AEC-Q100 (grade 1) for automotive applications.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Precision current limiter.
- Precision constant current sink.
- Isolated feedback loop for Switch Mode Power Supply (SMPS).
- Automotive, commercial, and military applications due to its wide temperature range and high thermal stability.
Q & A
- What is the TL431QDBZRG4?
The TL431QDBZRG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the operating temperature range of the TL431QDBZRG4?
The operating temperature range is from -40°C to 125°C.
- What are the reference voltage tolerances available for the TL431QDBZRG4?
The reference voltage tolerances are 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
- How is the output voltage of the TL431QDBZRG4 adjusted?
The output voltage can be adjusted using two external resistors to any value between Vref (approximately 2.5V) and 36V.
- What is the typical output impedance of the TL431QDBZRG4?
The typical output impedance is 0.2Ω.
- What are the sink-current capabilities of the TL431QDBZRG4?
The sink-current capability ranges from 1mA to 100mA.
- Is the TL431QDBZRG4 suitable for automotive applications?
- What are some common applications of the TL431QDBZRG4?
- How does the TL431QDBZRG4 compare to Zener diodes?
- What is the package type of the TL431QDBZRG4?
