Overview
The TL431AIDBZR is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This component is designed to provide a precise DC voltage output, adjustable from approximately 2.5V to 36V, using two external resistors. It is particularly useful in applications requiring stable voltage references, such as on-board regulation, adjustable power supplies, and switching power supplies. The TL431AIDBZR is available in a SOT-23-3 package and is suitable for industrial and automotive applications due to its wide operating temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage Tolerance (A Grade) | - | 1% | - | - |
| Output Voltage Range | 2.495V | - | 36V | V |
| Operating Temperature Range | -40°C | - | 85°C | °C |
| Sink Current Capability | 1mA | - | 100mA | mA |
| Typical Output Impedance | - | 0.2Ω | - | Ω |
| Typical Temperature Drift | - | 14mV | - | mV |
| Package Type | - | SOT-23-3 (DBZ) | - | - |
Key Features
- Adjustable output voltage from approximately 2.5V to 36V set by two external resistors.
- Reference voltage tolerance of 1% (A Grade), 0.5% (B Grade), and 2% (Standard Grade) at 25°C.
- Low output noise and typical output impedance of 0.2Ω.
- Sink current capability from 1mA to 100mA.
- Operating temperature range of -40°C to 85°C, making it suitable for industrial and automotive applications.
- AEC-Q100 qualified (Grade 1) for automotive use.
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- Shunt regulator.
- Precision current limiter.
- Precision constant current sink.
- Isolated feedback loop for Switch Mode Power Supplies (SMPS).
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431AIDBZR?
The TL431AIDBZR is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. - What is the adjustable output voltage range of the TL431AIDBZR?
The output voltage can be adjusted from approximately 2.5V to 36V using two external resistors. - What are the operating temperature ranges for the TL431AIDBZR?
The operating temperature range is -40°C to 85°C. - What is the typical output impedance of the TL431AIDBZR?
The typical output impedance is 0.2Ω. - What are the sink current capabilities of the TL431AIDBZR?
The sink current capability ranges from 1mA to 100mA. - Is the TL431AIDBZR suitable for automotive applications?
Yes, it is AEC-Q100 qualified (Grade 1) and operates within the temperature range suitable for automotive applications. - What package type is the TL431AIDBZR available in?
The TL431AIDBZR is available in a SOT-23-3 (DBZ) package. - What are some common applications of the TL431AIDBZR?
Common applications include shunt regulators, precision current limiters, precision constant current sinks, and isolated feedback loops for SMPS. - Can the TL431AIDBZR replace Zener diodes in some applications?
Yes, the TL431AIDBZR can replace Zener diodes due to its active output circuitry with a sharp turn-on characteristic. - What is the reference voltage tolerance for the A Grade TL431AIDBZR?
The reference voltage tolerance for the A Grade is 1% at 25°C.
