Overview
The TL431ACDT is an adjustable micropower shunt voltage reference produced by STMicroelectronics. This device is part of the TL431 series, known for its high temperature stability and adjustable output voltage. The TL431ACDT is particularly suited for applications requiring precise voltage regulation over a wide temperature range.
The device operates with a wide current range from 1 to 100 mA and features a typical dynamic impedance of 0.22 Ω. It is AEC-Q100 qualified, making it suitable for automotive applications. The output voltage can be set to any value between 2.5 and 36 V using two external resistors, providing flexibility in various circuit designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Cathode to Anode Voltage (VKA) | 37 | V |
| Continuous Cathode Current Range (Ik) | -100 to +150 | mA |
| Reference Input Current Range (Iref) | -0.05 to +10 | mA |
| Operating Junction Temperature (TJ) | 150 | °C |
| Operating Ambient Temperature Range (TA) | -40 to +125 | °C |
| Reference Input Voltage (Vref) | 2.44 to 2.495 | V |
| Typical Dynamic Impedance | 0.22 | Ω |
| Voltage Precision | 1% and 2% (depending on version) | |
| Thermal Resistance Junction to Ambient (Rthja) | 85 (SO-8 batwing package) | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications
- Adjustable output voltage: 2.5 to 36 V with two external resistors
- Sink current capability: 1 to 100 mA
- Typical output impedance: 0.22 Ω
- Voltage precision: 0.5% (TL431B version), 1%, and 2% (depending on the version)
- Extended operating temperature range for automotive versions: -40 °C to +125 °C
Applications
- Power supply systems requiring precise voltage regulation
- Industrial control systems
- Automotive electronics, including battery management and voltage regulation
- General-purpose voltage reference in various electronic circuits
Q & A
- What is the adjustable output voltage range of the TL431ACDT?
The output voltage can be set to any value between 2.5 and 36 V using two external resistors.
- What is the current range that the TL431ACDT can operate with?
The device operates with a current range from 1 to 100 mA.
- What is the typical dynamic impedance of the TL431ACDT?
The typical dynamic impedance is 0.22 Ω.
- Is the TL431ACDT suitable for automotive applications?
Yes, it is AEC-Q100 qualified and has an extended operating temperature range from -40 °C to +125 °C.
- What are the common packages available for the TL431ACDT?
The device is available in packages such as SO-8, TO-92, SOT23, and others.
- What is the reference input voltage (Vref) of the TL431ACDT?
The reference input voltage (Vref) is typically between 2.44 and 2.495 V.
- How does the voltage precision vary among different versions of the TL431?
The voltage precision can be 0.5% (TL431B version), 1%, or 2%, depending on the specific version.
- What is the thermal resistance junction to ambient (Rthja) for the SO-8 batwing package?
The thermal resistance junction to ambient (Rthja) for the SO-8 batwing package is 85 °C/W.
- What are some common applications of the TL431ACDT?
Common applications include power supply systems, industrial control systems, automotive electronics, and general-purpose voltage reference in various electronic circuits.
- What is the maximum junction temperature (TJ) for the TL431ACDT?
The maximum junction temperature (TJ) is 150 °C.
