Overview
The TL431ACLPRE3 is a 3-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its specified thermal stability over a wide range of temperature conditions, including automotive, commercial, and military environments. This device is characterized by its ability to set the output voltage to any value between the reference voltage (Vref, approximately 2.5V) and 36V using two external resistors. The TL431ACLPRE3 features active output circuitry, providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various 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 36 V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | TSSOP (PW) | |
| Pins | 8 |
Key Features
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Available in various packages, including SOIC, SOP, SOT-23, and more.
Applications
- On-board voltage regulation.
- Adjustable power supplies.
- Switching power supplies.
- Voltage and current referencing.
- Replacement for Zener diodes in various circuits.
Q & A
- What is the TL431ACLPRE3?
The TL431ACLPRE3 is a 3-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431ACLPRE3?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the operating temperature ranges for the TL431ACLPRE3?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431ACLPRE3?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431ACLPRE3?
The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431ACLPRE3?
Common applications include on-board voltage regulation, adjustable power supplies, switching power supplies, and voltage and current referencing.
- Why is the TL431ACLPRE3 a good replacement for Zener diodes?
The TL431ACLPRE3 features active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- What are the different grades of the TL431 series?
The TL431 series is available in three grades: B Grade (0.5% tolerance), A Grade (1% tolerance), and Standard Grade (2% tolerance) at 25°C.
- What is the package type of the TL431ACLPRE3?
The TL431ACLPRE3 is available in a TSSOP (PW) package.
- How many pins does the TL431ACLPRE3 have?
The TL431ACLPRE3 has 8 pins.
