Overview
The TL431AIPK is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431/TL431A series, known for its high precision and thermal stability over a wide operating temperature range. The TL431AIPK is designed to provide a programmable output voltage, making it versatile for various applications requiring precise voltage regulation.
The device features a shunt topology and can be adjusted to output voltages between 2.495V and 36V using external resistors. It is packaged in a TO-243AA (SOT-89-3) package, which is suitable for surface mount applications. The TL431AIPK is widely used as a replacement for zener diodes in many circuits due to its sharp turn-on characteristic and low dynamic output impedance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Texas Instruments | |
| Package | TO-243AA (SOT-89-3) | |
| Number of Channels | 1 | |
| Output Voltage Range | 2.495V to 36V | V |
| Output Voltage Accuracy | 1% | |
| Maximum Input Voltage | 37V | V |
| Maximum Output Current | 100mA | mA |
| Operating Temperature Range | -40°C to 85°C | °C |
| Dynamic Output Impedance | 0.2Ω (Typical) | Ω |
| Temperature Coefficient | 34ppm/°C (Typical) | ppm/°C |
Key Features
- Programmable Output Voltage: The output voltage can be set to any value between 2.495V and 36V using two external resistors.
- Low Dynamic Output Impedance: Typical dynamic output impedance of 0.2Ω, ensuring stable voltage regulation.
- High Accuracy: Initial accuracy of 1%, making it suitable for precision applications.
- Thermal Stability: Guaranteed thermal stability over the full operating temperature range.
- Low Output Noise Voltage: Minimized noise voltage for cleaner output.
- Fast Turn-on Response: Active output circuitry provides a sharp turn-on characteristic, making it an excellent replacement for zener diodes.
- Surface Mount Package: Packaged in TO-243AA (SOT-89-3) for easy integration into surface mount designs.
Applications
- Voltage Regulation: Used in various voltage regulation circuits where precise and adjustable output voltage is required.
- Replacement for Zener Diodes: Often used as a replacement for zener diodes due to its superior performance and stability.
- Power Supplies: Employed in power supply designs to provide stable and adjustable output voltages.
- Industrial and Automotive Systems: Suitable for use in industrial and automotive systems that require robust and precise voltage regulation.
- Measurement and Control Systems: Used in measurement and control systems where accurate voltage references are essential.
Q & A
- What is the TL431AIPK used for?
The TL431AIPK is used as a three-terminal adjustable shunt regulator for precise voltage regulation in various electronic circuits.
- What is the output voltage range of the TL431AIPK?
The output voltage range of the TL431AIPK is from 2.495V to 36V.
- What is the maximum input voltage for the TL431AIPK?
The maximum input voltage for the TL431AIPK is 37V.
- What is the maximum output current of the TL431AIPK?
The maximum output current of the TL431AIPK is 100mA.
- What is the operating temperature range of the TL431AIPK?
The operating temperature range of the TL431AIPK is from -40°C to 85°C.
- What is the typical dynamic output impedance of the TL431AIPK?
The typical dynamic output impedance of the TL431AIPK is 0.2Ω.
- Can the TL431AIPK replace zener diodes in circuits?
Yes, the TL431AIPK can be used as a replacement for zener diodes due to its sharp turn-on characteristic and low dynamic output impedance.
- What package type is the TL431AIPK available in?
The TL431AIPK is available in a TO-243AA (SOT-89-3) package.
- What is the temperature coefficient of the TL431AIPK?
The temperature coefficient of the TL431AIPK is typically 34ppm/°C.
- Is the TL431AIPK suitable for surface mount applications?
Yes, the TL431AIPK is suitable for surface mount applications.
