Overview
The TL431AIDT is an adjustable shunt voltage reference produced by STMicroelectronics. It is part of the TL431 and TL432 series, known for their guaranteed temperature stability across the entire operating temperature range. This device is particularly suited for applications requiring a high degree of voltage precision and stability. The TL431AIDT can be adjusted to output any voltage between 2.5 and 36 V using two external resistors, making it highly versatile for various power supply and industrial applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Cathode to Anode Voltage (VKA) | - | - | 37 | V |
| Continuous Cathode Current (IK) | -100 | - | 150 | mA |
| Reference Input Current (Iref) | -0.05 | - | 10 | mA |
| Operating Junction Temperature (TJ) | - | - | 150 | °C |
| Operating Ambient Temperature Range | -40 | - | 125 | °C |
| Reference Input Voltage (Vref) | 2.44 | 2.41 | 2.495 | V |
| Dynamic Impedance (|ZKA|) | - | 0.22 | 0.5 | Ω |
| Thermal Resistance, Junction to Ambient (Rthja) | - | - | 200 | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications
- Adjustable output voltage: 2.5 to 36 V
- Sink current capability: 1 to 100 mA
- Typical output impedance: 0.22 Ω
- 0.5% voltage precision (TL431B version), 1% and 2% voltage precision for other versions
- Automotive temperature range: -40 °C to +125 °C
Applications
The TL431AIDT is recommended for various applications, including:
- Power supply systems requiring adjustable and stable voltage references
- Industrial control systems where precise voltage regulation is necessary
- Automotive systems, given its AEC-Q100 qualification and extended temperature range
Q & A
- What is the adjustable output voltage range of the TL431AIDT?
The TL431AIDT can be adjusted to output any voltage between 2.5 and 36 V using two external resistors. - What is the sink current capability of the TL431AIDT?
The device can sink current in the range of 1 to 100 mA. - What is the typical dynamic impedance of the TL431AIDT?
The typical dynamic impedance is 0.22 Ω. - What is the operating temperature range for the TL431AIDT?
The operating temperature range is -40 °C to +125 °C. - Is the TL431AIDT AEC-Q100 qualified?
Yes, the TL431AIDT is AEC-Q100 qualified, making it suitable for automotive applications. - What is the reference input voltage (Vref) of the TL431AIDT?
The reference input voltage (Vref) is typically 2.41 V, with a range of 2.44 to 2.495 V. - What are the thermal resistance values for the TL431AIDT?
The thermal resistance, junction to ambient (Rthja), is typically 200 °C/W. - What are the common applications of the TL431AIDT?
The TL431AIDT is commonly used in power supply systems, industrial control systems, and automotive systems. - How do you adjust the output voltage of the TL431AIDT?
The output voltage can be adjusted using two external resistors connected to the reference and cathode pins. - What is the maximum junction temperature for the TL431AIDT?
The maximum junction temperature is 150 °C.
