Overview
The TL431CDBZRG4 is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TL431 family, known for its thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431CDBZRG4 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 configurations.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBZ), 3 pins |
| Operating Temperature Range | -40°C to 125°C |
| Reference Voltage Tolerance at 25°C | 2% (Standard grade) |
| Adjustable Output Voltage | Vref (approximately 2.5V) 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 Vref (approximately 2.5V) to 36V using two external resistors.
- Operation from -40°C to 125°C, ensuring stability across a wide temperature range.
- 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 a suitable replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
Applications
- On-board regulation and voltage monitoring.
- Adjustable power supplies and switching power supplies.
- Replacement for Zener diodes in various power supply configurations.
- Automotive, commercial, and military applications due to its thermal stability.
Q & A
- What is the operating temperature range of the TL431CDBZRG4?
The operating temperature range is from -40°C to 125°C.
- How is the output voltage of the TL431CDBZRG4 adjusted?
The output voltage can be adjusted using two external resistors and can be set to any value between Vref (approximately 2.5V) and 36V.
- What are the different grades of the TL431 device?
The TL431 device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
- What is the typical output impedance of the TL431CDBZRG4?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CDBZRG4?
The sink-current capability ranges from 1mA to 100mA.
- What are some common applications of the TL431CDBZRG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and as a replacement for Zener diodes.
- What is the package type of the TL431CDBZRG4?
The package type is SOT-23 (DBZ) with 3 pins.
- How does the TL431CDBZRG4 compare to Zener diodes?
The TL431CDBZRG4 has active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the reference voltage tolerance of the TL431CDBZRG4 at 25°C?
The reference voltage tolerance is 2% for the standard grade.
- What is the typical temperature drift of the TL431CDBZRG4?
The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
