Overview
The TL431IYDT, produced by STMicroelectronics, is an adjustable shunt voltage reference with guaranteed temperature stability over its entire operating temperature range. This device is part of the TL431 family, which includes various grades and packages tailored for different applications. The TL431IYDT is specifically designed for automotive and industrial use, offering high precision and reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Input Voltage (Vref) | 2.44 | 2.495 | 2.55 | V |
| Adjustable Output Voltage | 2.5 | - | 36 | V |
| Sink Current Capability | 1 | - | 100 | mA |
| Typical Output Impedance | - | 0.22 | - | Ω |
| Reference Voltage Tolerance at 25°C | - | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | - | % |
| Operating Temperature Range | -40 | - | 125 | °C |
| Thermal Resistance Junction to Ambient | - | 200 (TO-92), 85 (SO-8 batwing) | - | °C/W |
| Storage Temperature Range | -65 | - | 150 | °C |
Key Features
- AEC-Q100 qualified for automotive applications
- Adjustable output voltage from 2.5 V to 36 V using two external resistors
- Sink current capability from 1 mA to 100 mA
- Typical output impedance of 0.22 Ω
- High precision voltage reference with tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C
- Low output noise and sharp turn-on characteristic, making it an excellent replacement for Zener diodes
- Extended temperature range for automotive versions: -40°C to +125°C
Applications
- Power supply regulation
- Industrial control systems
- Automotive systems requiring high reliability and temperature stability
- On-board voltage regulation
- Adjustable power supplies and switching power supplies
Q & A
- What is the adjustable output voltage range of the TL431IYDT?
The output voltage can be set to any value between 2.5 V and 36 V using two external resistors.
- What are the different grades of the TL431 and their respective voltage tolerances?
The TL431 comes in B, A, and Standard grades with voltage tolerances of 0.5%, 1%, and 2% at 25°C, respectively.
- What is the operating temperature range of the TL431IYDT?
The TL431IYDT operates from -40°C to +125°C, making it suitable for automotive and industrial applications.
- What is the typical output impedance of the TL431IYDT?
The typical output impedance is 0.22 Ω.
- What is the sink current capability of the TL431IYDT?
The device can sink current from 1 mA to 100 mA.
- Is the TL431IYDT AEC-Q100 qualified?
Yes, the TL431IYDT is AEC-Q100 qualified, making it suitable for automotive applications.
- What are some common applications of the TL431IYDT?
Common applications include power supply regulation, industrial control systems, automotive systems, on-board voltage regulation, and adjustable power supplies.
- How does the TL431IYDT compare to Zener diodes?
The TL431IYDT has active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications).
- What is the storage temperature range for the TL431IYDT?
The storage temperature range is from -65°C to +150°C).
- What is the thermal resistance junction to ambient for the TL431IYDT?
The thermal resistance junction to ambient varies by package, but for the SO-8 batwing package, it is approximately 85°C/W).
