Overview
The TL431ILPR is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 family, known for its specified thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The device features active output circuitry, providing a sharp turn-on characteristic, which makes it an excellent replacement for Zener diodes in various power supply and regulation applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TO-92 (LP), 3 pins |
| Operating Temperature Range | -40°C to 85°C |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref (approximately 2.5V) to 36V |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
Key Features
- Active output circuitry with a sharp turn-on characteristic
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors
- Low output noise and typical output impedance of 0.2Ω
- Sink-current capability from 1mA to 100mA
- Low output drift versus temperature, ensuring good stability over the entire temperature range
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C
Applications
The TL431ILPR is versatile and can be used in a variety of applications, including:
- On-board regulation
- Adjustable power supplies
- Switching power supplies
- Replacing Zener diodes in many circuits
Q & A
- What is the TL431ILPR?
The TL431ILPR is a three-terminal adjustable shunt regulator produced by Texas Instruments. - What are the operating temperature ranges for the TL431ILPR?
The operating temperature range is from -40°C to 85°C. - What are the reference voltage tolerances for the TL431ILPR?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C. - What is the adjustable output voltage range for the TL431ILPR?
The adjustable output voltage range is from Vref (approximately 2.5V) to 36V. - What is the typical output impedance of the TL431ILPR?
The typical output impedance is 0.2Ω. - What is the sink-current capability of the TL431ILPR?
The sink-current capability is from 1mA to 100mA. - What are some common applications for the TL431ILPR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and replacing Zener diodes. - How does the TL431ILPR compare to Zener diodes?
The TL431ILPR has active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications. - What are the thermal stability characteristics of the TL431ILPR?
The device has specified thermal stability over a wide range of temperatures, ensuring low output drift versus temperature. - What are the different grades of the TL431ILPR?
The TL431ILPR is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
