Overview
The TL431AQDBZR is a three-terminal adjustable shunt regulator manufactured by Texas Instruments. It is designed to provide a precise reference voltage and is widely used in various applications requiring stable voltage regulation. The device operates over a wide temperature range from -40°C to 125°C, making it suitable for automotive, commercial, and military environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBZ) | |
| Operating Temperature Range | -40 to 125 | °C |
| Reference Voltage | 2.495 to 2.55 | V |
| Output Voltage Range | 2.52 to 36 | V |
| Output Impedance | 0.2Ω (Typical) | Ω |
| Sink-Current Capability | 1 to 100 | mA |
| Cathode Current | 0.6 mA | mA |
| Power Dissipation | 950 mW | mW |
| Mounting Method | Surface Mount |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V, set by two external resistors.
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- Operation from -40°C to 125°C.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Low operating current, making it ideal for battery-powered applications.
- Internal current limiting for protection.
- Under-voltage lockout for minimum component count.
Applications
- Shunt regulator.
- Precision current limiter.
- Precision constant current sink.
- Isolated feedback loop for Switch Mode Power Supply (SMPS).
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
Q & A
- What is the operating temperature range of the TL431AQDBZR?
The operating temperature range is from -40°C to 125°C.
- What is the reference voltage of the TL431AQDBZR?
The reference voltage is approximately 2.495 to 2.55 V.
- How is the output voltage of the TL431AQDBZR adjusted?
The output voltage can be adjusted using two external resistors.
- What is the maximum output current of the TL431AQDBZR?
The maximum output current is 100 mA.
- What are the typical applications of the TL431AQDBZR?
Typical applications include shunt regulators, precision current limiters, precision constant current sinks, and isolated feedback loops for SMPS.
- What is the package type of the TL431AQDBZR?
The package type is SOT-23 (DBZ).
- What is the output impedance of the TL431AQDBZR?
The typical output impedance is 0.2Ω.
- Does the TL431AQDBZR have internal current limiting?
Yes, it has internal current limiting for protection.
- Is the TL431AQDBZR suitable for battery-powered applications?
Yes, it is suitable due to its low operating current.
- What is the power dissipation of the TL431AQDBZR?
The power dissipation is 950 mW.
