Overview
The TL431ACDBZT is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 and TL432 series, known for their thermal stability and versatility in various applications. The TL431ACDBZT is particularly useful in scenarios requiring precise voltage regulation, such as on-board regulation, adjustable power supplies, and switching power supplies. It offers 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 |
| Package Quantity | Carrier 250 (Small T&R), Carrier 3,000 (Large T&R) |
Key Features
- Adjustable output voltage: Can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- Low Output Noise: Ensures stable voltage regulation.
- Typical output impedance of 0.2Ω: Provides minimal resistance in the output circuit.
- Sink-current capability: Ranges from 1mA to 100mA.
- Sharp turn-on characteristic: Makes it an excellent replacement for Zener diodes.
- Thermal stability: Operates over a wide temperature range from -40°C to 125°C.
Applications
- On-board regulation: Used for local voltage regulation within a circuit.
- Adjustable power supplies: Allows for flexible voltage settings in power supply designs.
- Switching power supplies: Enhances stability and precision in switching power supply circuits.
- Replacement for Zener diodes: Offers better thermal stability and sharper turn-on characteristics compared to traditional Zener diodes.
Q & A
- What is the TL431ACDBZT used for? The TL431ACDBZT is used as a three-terminal adjustable shunt regulator for precise voltage regulation in various applications.
- What is the operating temperature range of the TL431ACDBZT? The operating temperature range is from -40°C to 125°C.
- How is the output voltage of the TL431ACDBZT adjusted? The output voltage can be adjusted to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the typical applications of the TL431ACDBZT? Typical applications include on-board regulation, adjustable power supplies, and switching power supplies.
- What is the typical output impedance of the TL431ACDBZT? The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431ACDBZT? The sink-current capability ranges from 1mA to 100mA.
- What are the different grades of the TL431ACDBZT based on initial tolerance? The TL431ACDBZT is available in three grades with initial tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- How does the TL431ACDBZT compare to Zener diodes? The TL431ACDBZT offers better thermal stability and a sharper turn-on characteristic compared to traditional Zener diodes.
- What is the package type of the TL431ACDBZT? The package type is SOT-23 (DBZ).
- What is the typical temperature drift of the TL431ACDBZT? The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
