Overview
The TL431AW5-7 is an adjustable precision shunt regulator produced by Diodes Incorporated. It is part of the TL431 series, which offers excellent temperature stability and high output current handling capability. This device is designed to replace zener diodes in many applications, providing improved performance and reliability. The TL431AW5-7 is available in the SOT25 package and is fully RoHS compliant, making it suitable for a wide range of electronic systems.
Key Specifications
| Parameter | Min | Typ. | Max | Unit |
|---|---|---|---|---|
| Cathode Voltage (VKA) | - | - | 40 | V |
| Continuous Cathode Current (IKA) | - | - | 150 | mA |
| Reference Input Current (IREF) | -0.050 | - | 10 | mA |
| Operating Junction Temperature (TJ) | - | - | 150 | °C |
| Storage Temperature (TST) | -55 | - | 150 | °C |
| Power Dissipation (PD) at 25°C | - | - | 500 | mW |
| Reference Voltage (VREF) at 25°C | 2.482 | 2.495 | 2.507 | V |
| Output Impedance | - | 0.2 | - | Ω |
| Sink Current Capability | 1 | - | 100 | mA |
| Adjustable Output Voltage | VREF | - | 36 | V |
Key Features
- Adjustable output voltage from VREF to 36V using external divider resistors.
- Temperature range: -40°C to +125°C.
- Low output noise.
- Typical output impedance of 0.2Ω.
- Sink current capability from 1mA to 100mA.
- Reference voltage tolerance at 25°C: ±0.5% for TL431B grade.
- Totally lead-free and fully RoHS compliant.
- Halogen and antimony free, making it a “green” device.
Applications
- Opto-coupler linearizers.
- Shunt regulators.
- Improved zener diode replacements.
- Variable reference voltage applications.
Q & A
- What is the TL431AW5-7 used for?
The TL431AW5-7 is used as an adjustable precision shunt regulator, often replacing zener diodes in various applications.
- What is the temperature range of the TL431AW5-7?
The device operates over a temperature range of -40°C to +125°C.
- What is the maximum cathode voltage for the TL431AW5-7?
The maximum cathode voltage is 40V.
- How is the output voltage of the TL431AW5-7 adjusted?
The output voltage can be adjusted using two external divider resistors, allowing it to be set between VREF and 36V.
- What is the typical output impedance of the TL431AW5-7?
The typical output impedance is 0.2Ω.
- Is the TL431AW5-7 RoHS compliant?
Yes, the TL431AW5-7 is totally lead-free and fully RoHS compliant.
- What are the key applications of the TL431AW5-7?
Key applications include opto-coupler linearizers, shunt regulators, and improved zener diode replacements.
- What is the maximum sink current capability of the TL431AW5-7?
The maximum sink current capability is 100mA.
- What is the reference voltage tolerance at 25°C for the TL431B grade?
The reference voltage tolerance at 25°C for the TL431B grade is ±0.5%.
- Is the TL431AW5-7 halogen and antimony free?
Yes, the TL431AW5-7 is halogen and antimony free, making it a “green” device.
