Overview
The TL431CDBZTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 family, known for its high precision and adjustable output voltage. This device is designed to provide thermal stability over a wide range of temperatures, making it suitable for various applications including automotive, commercial, and military environments. The TL431CDBZTG4 offers a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many scenarios.
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 Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
Key Features
- Adjustable output voltage set by two external resistors between Vref (approximately 2.5V) and 36V.
- Reference voltage tolerance at 25°C: 2% for the Standard Grade.
- Operation from -40°C to 125°C.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability: 1mA to 100mA.
- Active output circuitry with a sharp turn-on characteristic, suitable for replacing Zener diodes.
Applications
The TL431CDBZTG4 is versatile and can be used in various applications, including:
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive, commercial, and military temperature ranges.
Q & A
- What is the operating temperature range of the TL431CDBZTG4?
The operating temperature range is -40°C to 125°C. - What is the adjustable output voltage range of the TL431CDBZTG4?
The output voltage can be set between Vref (approximately 2.5V) and 36V using two external resistors. - What are the reference voltage tolerances available for the TL431 family?
The TL431 family is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C. - What is the typical output impedance of the TL431CDBZTG4?
The typical output impedance is 0.2Ω. - What is the sink-current capability of the TL431CDBZTG4?
The sink-current capability ranges from 1mA to 100mA. - Can the TL431CDBZTG4 replace Zener diodes in some applications?
Yes, the TL431CDBZTG4 has active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications. - What package type is the TL431CDBZTG4 available in?
The TL431CDBZTG4 is available in the SOT-23 (DBZ) package with 3 pins. - What are some common applications of the TL431CDBZTG4?
Common applications include on-board regulation, adjustable power supplies, and switching power supplies. - Does the TL431CDBZTG4 have low output noise?
Yes, the TL431CDBZTG4 has low output noise. - How does the temperature drift affect the TL431CDBZTG4?
The TL431CDBZTG4 has a typical temperature drift of 6mV (C temp) and 14mV (I temp, Q temp), ensuring good stability over the entire temperature range.
