Overview
The TL431BQDBZT is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 and TL432 family, known for their specified thermal stability over a wide range of temperatures. The TL431BQDBZT is particularly characterized for operation from -40°C to 125°C, making it suitable for various automotive, commercial, and military applications. The output voltage can be set to any value between the reference voltage (approximately 2.5V) and 36V using two external resistors, providing high flexibility in voltage regulation.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TL431BQDBZT |
| Package | SOT-23 (DBZ) |
| Pins | 3 |
| Operating Temperature Range (°C) | -40 to 125 |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade) |
| Adjustable Output Voltage | Vref 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 over 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 an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation and adjustable power supplies.
- Switching power supplies where precise voltage regulation is required.
- Automotive, commercial, and military applications due to its wide operating temperature range.
- Replacement for Zener diodes in various circuits requiring adjustable voltage regulation.
Q & A
- What is the operating temperature range of the TL431BQDBZT?
The TL431BQDBZT operates from -40°C to 125°C.
- How is the output voltage of the TL431BQDBZT adjusted?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the different grades of the TL431BQDBZT based on reference voltage tolerance?
The TL431BQDBZT is available in three grades with initial tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the typical output impedance of the TL431BQDBZT?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431BQDBZT?
The sink-current capability ranges from 1mA to 100mA.
- Can the TL431BQDBZT replace Zener diodes in some applications?
Yes, the TL431BQDBZT can replace Zener diodes due to its active output circuitry and sharp turn-on characteristic.
- What package type is the TL431BQDBZT available in?
The TL431BQDBZT is available in the SOT-23 (DBZ) package.
- What are some common applications of the TL431BQDBZT?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and automotive, commercial, and military applications.
- Is the TL431BQDBZT RoHS compliant?
Yes, the TL431BQDBZT is RoHS compliant.
- What is the typical temperature drift of the TL431BQDBZT?
The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
