Overview
The TL431CLPR is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 family, known for their specified thermal stability over a wide range of temperatures, including automotive, commercial, and military applications. The device allows for adjustable output voltage between approximately 2.5V (Vref) and 36V using two external resistors. It features active output circuitry that provides a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref to 36V |
| Operating Temperature Range | −40°C to 125°C (TL43xxQ), −40°C to 85°C (TL43xxI), 0°C to 70°C (TL43xxC) |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
| Output Impedance | 0.2Ω (typical) |
| Sink-Current Capability | 1mA to 100mA |
| Package Type | TO-92 (LP) |
| Number of Pins | 3 |
Key Features
- 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
- Sharp turn-on characteristic due to active output circuitry, making it suitable as a replacement for Zener diodes
- Available in three grades with different initial tolerances at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade)
Applications
- On-board regulation
- Adjustable power supplies
- Switching power supplies
- Replacement for Zener diodes in various applications
Q & A
- What is the TL431CLPR?
The TL431CLPR is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431CLPR?
The output voltage can be adjusted between approximately 2.5V (Vref) and 36V using two external resistors.
- What are the operating temperature ranges for the TL431CLPR?
The device operates from −40°C to 125°C (TL43xxQ), −40°C to 85°C (TL43xxI), and 0°C to 70°C (TL43xxC).
- What is the typical output impedance of the TL431CLPR?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CLPR?
The sink-current capability ranges from 1mA to 100mA.
- What are the key applications of the TL431CLPR?
Key applications include on-board regulation, adjustable power supplies, switching power supplies, and as a replacement for Zener diodes.
- What are the different grades of the TL431CLPR based on initial tolerance?
The device is available in three grades with initial tolerances at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- What is the package type of the TL431CLPR?
The device is packaged in a TO-92 (LP) package with 3 pins.
- Does the TL431CLPR have low output noise?
Yes, the TL431CLPR has low output noise.
- Can the TL431CLPR be used in military applications?
Yes, the TL431CLPR is specified for thermal stability over military temperature ranges.
