Overview
The TL431ACDRE4, produced by Texas Instruments, is a 3-terminal adjustable precision shunt regulator. This device is part of the TL431 series, known for its high thermal stability and versatility in various applications. The TL431ACDRE4 is characterized for operation from 0°C to 70°C, making it suitable for commercial and industrial use cases. It features an adjustable output voltage that can be set between approximately 2.5 V and 36 V using two external resistors, making it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2.44 | 2.495 | 2.55 | V |
| Output Voltage Range | 2.5 | - | 36 | V |
| Sink Current Capability | 1 | - | 100 | mA |
| Typical Output Impedance | - | 0.2 | - | Ω |
| Operating Temperature Range | 0 | - | 70 | °C |
| Reference Voltage Tolerance at 25°C | - | 1% | - | - |
| Dynamic Impedance | - | 0.2 | 0.5 | Ω |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between approximately 2.5 V and 36 V using two external resistors.
- High Thermal Stability: Guaranteed thermal stability over the entire operating temperature range.
- Low Output Impedance: Typical output impedance of 0.2 Ω.
- Sink Current Capability: Can sink current from 1 mA to 100 mA.
- Low Output Noise: Features low output noise, making it suitable for noise-sensitive applications.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Multiple Packaging Options: Available in various high-density packaging options such as SOT-89, TO-226AA, and more.
Applications
- On-Board Regulation: Used for voltage regulation within electronic boards.
- Adjustable Power Supplies: Ideal for applications requiring adjustable output voltages.
- Switching Power Supplies: Suitable for use in switching power supply circuits.
- Industrial and Automotive Systems: Used in industrial and automotive applications due to its robust thermal stability and reliability.
- Rack Server Power and AC/DC Converters: Utilized in server power systems and AC/DC converters for their precision and stability.
Q & A
- What is the adjustable output voltage range of the TL431ACDRE4?
The output voltage can be set to any value between approximately 2.5 V and 36 V using two external resistors.
- What is the typical output impedance of the TL431ACDRE4?
The typical output impedance is 0.2 Ω.
- What is the sink current capability of the TL431ACDRE4?
The device can sink current from 1 mA to 100 mA.
- What is the operating temperature range of the TL431ACDRE4?
The device operates from 0°C to 70°C.
- What are the packaging options available for the TL431ACDRE4?
The device is available in various high-density packaging options such as SOT-89, TO-226AA, and more.
- Is the TL431ACDRE4 suitable for automotive applications?
No, the TL431ACDRE4 is characterized for commercial and industrial use, not specifically for automotive applications which require a wider temperature range.
- What is the reference voltage tolerance at 25°C for the TL431ACDRE4?
The reference voltage tolerance at 25°C is 1% for the A grade.
- Can the TL431ACDRE4 replace Zener diodes in many applications?
Yes, the TL431ACDRE4 is an excellent replacement for Zener diodes due to its sharp turn-on characteristic and adjustable output voltage.
- What are some common applications of the TL431ACDRE4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and industrial systems.
- Does the TL431ACDRE4 have low output noise?
Yes, the device features low output noise, making it suitable for noise-sensitive applications.
