Overview
The TL431CDT is an adjustable shunt voltage reference produced by STMicroelectronics. It is part of the TL431 and TL432 series, known for their guaranteed temperature stability over a wide operating temperature range. The TL431CDT is particularly suited for applications requiring high precision and reliability, especially in automotive and industrial environments. The device allows for adjustable output voltage between 2.5 and 36 V using two external resistors, making it highly versatile for various voltage regulation needs.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Reference Input Voltage (Vref) | 2.44 | 2.495 | 2.55 | V |
| Sink Current Capability (Ik) | 1 | - | 100 | mA |
| Typical Output Impedance (ZKA) | - | 0.22 | 0.5 | Ω |
| Minimum Cathode Current for Regulation (Imin) | 0.5 | - | 1 | mA |
| Off-State Cathode Current (Ioff) | - | - | 500 | nA |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- AEC-Q100 qualified, ensuring high reliability for automotive applications.
- Adjustable output voltage: 2.5 to 36 V using two external resistors.
- Sink current capability: 1 to 100 mA.
- Typical output impedance: 0.22 Ω.
- Voltage precision options: 0.5% (TL431B version), 1%, and 2%.
- Extended automotive temperature range: -40 °C to +125 °C.
Applications
- Power supply systems requiring adjustable voltage references.
- Industrial control systems and equipment.
- Automotive systems, including those requiring AEC-Q100 qualification.
Q & A
- What is the adjustable output voltage range of the TL431CDT?
The TL431CDT can be set to any output voltage between 2.5 and 36 V using two external resistors.
- What is the sink current capability of the TL431CDT?
The sink current capability ranges from 1 to 100 mA.
- What is the typical output impedance of the TL431CDT?
The typical output impedance is 0.22 Ω.
- What are the voltage precision options for the TL431 series?
Voltage precision options include 0.5% (TL431B version), 1%, and 2%.
- What is the operating temperature range for the TL431CDT?
The operating temperature range is -40 °C to +125 °C.
- Is the TL431CDT AEC-Q100 qualified?
- What types of applications is the TL431CDT commonly used in?
The TL431CDT is commonly used in power supply systems, industrial control systems, and automotive systems.
- How do you set the output voltage of the TL431CDT?
The output voltage can be set using two external resistors.
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is 0.5 mA.
- What is the off-state cathode current of the TL431CDT?
The off-state cathode current is typically up to 500 nA.
