Overview
The TL431AILPRP, produced by onsemi, is a three-terminal adjustable shunt regulator. This device operates as a low temperature coefficient zener diode that can be programmed to output voltages ranging from the reference voltage (approximately 2.5V) to 36V using two external resistors. It is part of the TL431 series, known for its thermal stability over a wide range of temperatures, making it suitable for various applications including automotive, commercial, and military environments.
Key Specifications
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Cathode to Anode Voltage | VKA | 37 | V |
| Cathode Current Range, Continuous | IK | −100 to +150 | mA |
| Reference Input Current Range, Continuous | Iref | −0.05 to +10 | mA |
| Operating Junction Temperature | TJ | 150 | °C |
| Operating Ambient Temperature Range | TA | −40 to +85 | °C |
| Reference Voltage | Vref | 2.44 to 2.495 | V |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | ||
| Dynamic Impedance | |ZKA| | 0.22 to 0.5 | Ω |
| Output Impedance | 0.2 Ω (Typical) | ||
| Sink Current Capability | 1.0 mA to 100 mA |
Key Features
- Programmable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Voltage reference tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade).
- Low dynamic output impedance: 0.22 Ω typical.
- Sink current capability: 1.0 mA to 100 mA.
- Low output noise voltage.
- Operation from −40°C to 85°C (or up to 125°C for some packages).
- Pb-free packages available).
Applications
- Digital voltmeters and other precision measurement instruments).
- Power supplies, including adjustable and switching power supplies).
- Op-amp circuitry and feedback control systems).
- Voltage monitoring and regulation in various electronic systems).
- Constant current sources and sinks).
- Series pass regulators).
Q & A
- What is the TL431AILPRP used for?
The TL431AILPRP is a three-terminal adjustable shunt regulator used in applications requiring a stable and programmable voltage reference, such as power supplies, digital voltmeters, and op-amp circuitry).
- What is the operating temperature range of the TL431AILPRP?
The TL431AILPRP operates from −40°C to 85°C).
- What is the typical output impedance of the TL431AILPRP?
The typical output impedance is 0.2 Ω).
- What is the sink current capability of the TL431AILPRP?
The sink current capability ranges from 1.0 mA to 100 mA).
- How is the output voltage of the TL431AILPRP programmed?
The output voltage can be programmed using two external resistors to set the voltage between Vref (approximately 2.5V) and 36V).
- What are the different grades of the TL431AILPRP based on voltage tolerance?
The TL431AILPRP comes in B, A, and standard grades with voltage tolerances of 0.5%, 1%, and 2% respectively at 25°C).
- Is the TL431AILPRP suitable for high-temperature applications?
Yes, it is suitable for high-temperature applications, operating up to 85°C, and some packages can operate up to 125°C).
- What is the typical dynamic impedance of the TL431AILPRP?
The typical dynamic impedance is 0.22 Ω).
- Can the TL431AILPRP be used as a replacement for Zener diodes?
Yes, the TL431AILPRP can be used as a replacement for Zener diodes in many applications due to its sharp turn-on characteristic and low output impedance).
- Are Pb-free packages available for the TL431AILPRP?
Yes, Pb-free packages are available for the TL431AILPRP).
- What is the maximum cathode to anode voltage for the TL431AILPRP?
The maximum cathode to anode voltage is 37V).
