Overview
The TL431AILPR, produced by Texas Instruments, is a three-terminal adjustable shunt regulator. This device is part of the TL431 family, known for its thermal stability across various temperature ranges, including automotive, commercial, and military environments. The TL431AILPR allows for adjustable output voltage settings between approximately 2.5V and 36V using two external resistors. It features active output circuitry, providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in numerous applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
| Typical Output Impedance | 0.2Ω | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Package | TO-92 (LP) | |
| Pins | 3 |
Key Features
- Adjustable output voltage from approximately 2.5V to 36V using two external resistors.
- Specified thermal stability over automotive, commercial, and military temperature ranges.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Secondary side regulation in flyback SMPSs.
- Zener replacement.
- Voltage monitoring.
- Comparator with integrated reference.
Q & A
- What is the TL431AILPR?
The TL431AILPR is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431AILPR?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the operating temperature ranges for the TL431AILPR?
The device operates from −40°C to 125°C.
- What are the typical temperature drift values for the TL431AILPR?
The typical temperature drift is 6mV for C temp and 14mV for I temp and Q temp.
- What is the typical output impedance of the TL431AILPR?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431AILPR?
The sink-current capability ranges from 1mA to 100mA.
- In what packages is the TL431AILPR available?
The TL431AILPR is available in the TO-92 (LP) package.
- What are some common applications of the TL431AILPR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and Zener replacement.
- How does the TL431AILPR compare to Zener diodes?
The TL431AILPR provides a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the different grades of the TL431AILPR based on reference voltage tolerance?
The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
