Overview
The TL431BCLPME3 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 family, known for its precision and adjustability. The TL431BCLPME3 offers specified thermal stability over a wide range of temperatures, making it suitable for various applications including automotive, commercial, and military environments.
The device allows for adjustable output voltage between approximately 2.5V and 36V using two external resistors. It features a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications such as on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2440 | 2495 | 2550 | mV |
| 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 | - | 125°C | °C |
| Typical Temperature Drift | - | 6mV (C temp), 14mV (I temp, Q temp) | - | mV |
| Output Impedance | - | 0.2Ω | - | Ω |
| Sink-Current Capability | 1mA | - | 100mA | mA |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- Thermal Stability: Specified thermal stability over a wide range of temperatures, including automotive, commercial, and military temperature ranges.
- Low Output Noise: Features low output noise, making it suitable for noise-sensitive applications.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Low Output Impedance: Typical output impedance of 0.2Ω.
- Sink-Current Capability: Capable of sinking current from 1mA to 100mA.
Applications
- On-Board Regulation: Used for regulating voltage on circuit boards.
- Adjustable Power Supplies: Suitable for use in adjustable power supply designs.
- Switching Power Supplies: Used in switching power supply applications due to its sharp turn-on characteristic.
- Automotive and Military Applications: Characterized for operation over a wide temperature range, making it suitable for automotive and military applications.
Q & A
- What is the TL431BCLPME3?
The TL431BCLPME3 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431BCLPME3?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431BCLPME3?
The device is characterized for operation from -40°C to 125°C.
- What is the typical output impedance of the TL431BCLPME3?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431BCLPME3?
The device can sink current from 1mA to 100mA.
- Can the TL431BCLPME3 replace Zener diodes?
Yes, it can replace Zener diodes due to its sharp turn-on characteristic and low output noise.
- What are some common applications of the TL431BCLPME3?
Common applications include on-board regulation, adjustable power supplies, and switching power supplies.
- What are the different grades of the TL431BCLPME3 based on reference voltage tolerance?
The device is offered in three grades with initial tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- How does the TL431BCLPME3 ensure thermal stability?
The device ensures good stability over the entire temperature range due to its low output drift versus temperature.
- What is the package type of the TL431BCLPME3?
The TL431BCLPME3 is available in various packages including SOT-23, SOIC, PDIP, and SOP.
