Overview
The TL431AQDBZR is a precision programmable voltage reference produced by Texas Instruments. This three-terminal adjustable shunt regulator is designed to provide a stable voltage reference with high accuracy and thermal stability. It is available in a SOT-23 package and is suitable for a wide range of applications, including on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Specification | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TL431AQDBZR |
| Package | SOT-23 (DBZ) |
| Operating Temperature Range | -40°C to 125°C |
| Output Voltage Range | 2.495V to 36V |
| Output Current | 1mA to 100mA |
| Reference Voltage Tolerance | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Output Impedance | 0.2Ω (typical) |
| RoHS Compliance | Yes |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Precision voltage reference with thermal stability over automotive, commercial, and military temperature ranges.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- Available in three grades with different initial tolerances: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Industrial power meters.
- General voltage regulation in electronic circuits.
Q & A
- What is the operating temperature range of the TL431AQDBZR?
The operating temperature range is -40°C to 125°C.
- What is the output voltage range of the TL431AQDBZR?
The output voltage can be set between 2.495V and 36V.
- What are the different grades of the TL431AQDBZR based on voltage tolerance?
The device is available in three grades: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- What is the typical output impedance of the TL431AQDBZR?
The typical output impedance is 0.2Ω.
- Is the TL431AQDBZR RoHS compliant?
Yes, the TL431AQDBZR is RoHS compliant.
- What is the package type of the TL431AQDBZR?
The package type is SOT-23 (DBZ).
- What are some common applications of the TL431AQDBZR?
Common applications include on-board regulation, adjustable power supplies, and switching power supplies.
- How does the TL431AQDBZR compare to Zener diodes?
The TL431AQDBZR has a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the maximum output current of the TL431AQDBZR?
The maximum output current is 100mA.
- Is the TL431AQDBZR suitable for automotive applications?
Yes, the device is characterized for operation over automotive temperature ranges.
