Overview
The TL431IL5T is an adjustable micropower shunt voltage reference produced by STMicroelectronics. This device is part of the TL431 series, known for its guaranteed temperature stability over the entire operating temperature range. The TL431IL5T is particularly suited for applications requiring high precision and reliability, including industrial, automotive, and power supply systems. It operates with a wide current range and offers adjustable output voltage, making it versatile for various use cases.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Adjustable Output Voltage | 2.5 to 36 | V |
| Sink Current Capability | 1 to 100 | mA |
| Typical Output Impedance | 0.22 | Ω |
| Voltage Precision | 0.5% (B Grade), 1% (A Grade), 2% | |
| Operating Temperature Range | -40 to +125 | °C |
| Cathode to Anode Voltage | 37 | V |
| Reference Input Current | -0.05 to +10 | mA |
| Thermal Resistance Junction to Ambient | 200 (TO-92), 85 (SO-8), 248 (SOT23-3L) | °C/W |
| Storage Temperature Range | -65 to +150 | °C |
Key Features
- AEC-Q100 qualified for automotive applications
- Adjustable output voltage between 2.5 and 36 V using two external resistors
- Sink current capability from 1 to 100 mA
- Typical output impedance of 0.22 Ω
- Voltage precision options: 0.5% (B Grade), 1% (A Grade), and 2%
- Extended operating temperature range for automotive versions: -40 °C to +125 °C
Applications
- Power supply systems
- Industrial control systems
- Automotive systems requiring high temperature stability
- Secondary side regulation in flyback SMPS
- Zener diode replacement
- Voltage monitoring and precision constant current sink/source
- Comparator with integrated reference
Q & A
- What is the adjustable output voltage range of the TL431IL5T?
The output voltage can be set to any value between 2.5 and 36 V using two external resistors.
- What is the sink current capability of the TL431IL5T?
The device can sink current in the range of 1 to 100 mA.
- What is the typical output impedance of the TL431IL5T?
The typical output impedance is 0.22 Ω.
- What are the voltage precision options for the TL431IL5T?
The voltage precision options are 0.5% (B Grade), 1% (A Grade), and 2%.
- What is the operating temperature range for the automotive version of the TL431IL5T?
The operating temperature range for the automotive version is -40 °C to +125 °C.
- Is the TL431IL5T AEC-Q100 qualified?
Yes, the TL431IL5T is AEC-Q100 qualified for automotive applications.
- What are some common applications of the TL431IL5T?
Common applications include power supply systems, industrial control systems, automotive systems, and Zener diode replacement.
- What is the storage temperature range for the TL431IL5T?
The storage temperature range is -65 to +150 °C.
- What is the thermal resistance junction to ambient for the TL431IL5T in different packages?
The thermal resistance varies by package, e.g., 200 °C/W for TO-92, 85 °C/W for SO-8, and 248 °C/W for SOT23-3L.
- Can the TL431IL5T be used as a comparator with an integrated reference?
Yes, the TL431IL5T can be used as a comparator with an integrated reference.
