Overview
The TL431CLPX is a three-terminal adjustable shunt regulator produced by Fairchild Semiconductor. This device is part of the TL431 series, known for its programmable output voltage and thermal stability over a wide temperature range. The TL431CLPX is designed to offer a high degree of precision and reliability, making it suitable for various applications requiring voltage regulation.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Cathode Voltage | VKA | 37 | V |
| Cathode Current Range | IKA | 1.0 to 100 | mA |
| Reference Input Voltage | VREF | 2.44 to 2.495 | V |
| Dynamic Output Impedance | ZKA | 0.2 | Ω (Typical) |
| Operating Temperature Range | TOPR | -25 to +85 | °C |
| Storage Temperature Range | TSTG | -65 to +150 | °C |
| Power Dissipation (TO-92 Package) | PD | 770 | mW |
Key Features
- Programmable Output Voltage: The output voltage can be set to any value between VREF (approximately 2.5 volts) and 36 volts using two external resistors.
- Low Dynamic Output Impedance: Typical dynamic output impedance of 0.2Ω, ensuring stable voltage regulation.
- Sink Current Capability: The device can sink current in the range of 1.0 to 100 mA.
- Temperature Stability: Guaranteed thermal stability over the full rated operating temperature range.
- Low Output Noise Voltage: The TL431CLPX features low output noise, making it suitable for noise-sensitive applications.
- Fast Turn-on Response: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for zener diodes in many applications.
Applications
- Shunt Regulation: The TL431CLPX can be used as a shunt regulator to regulate voltage in various circuits.
- Current Limiting and Current Sourcing: It can be configured to act as a current limiter or current source.
- Output Control for Fixed Regulators: The device can be used to control the output of three-terminal fixed regulators.
- High Current Shunt Regulators: Suitable for applications requiring high current shunt regulation.
Q & A
- What is the typical dynamic output impedance of the TL431CLPX?
The typical dynamic output impedance is 0.2Ω.
- What is the range of the cathode current for the TL431CLPX?
The cathode current range is from 1.0 to 100 mA.
- What is the operating temperature range for the TL431CLPX?
The operating temperature range is -25°C to +85°C.
- How is the output voltage of the TL431CLPX programmed?
The output voltage can be set using two external resistors to any value between VREF (approximately 2.5 volts) and 36 volts.
- What is the storage temperature range for the TL431CLPX?
The storage temperature range is -65°C to +150°C.
- What is the power dissipation for the TO-92 package of the TL431CLPX?
The power dissipation for the TO-92 package is 770 mW.
- Can the TL431CLPX be used as a replacement for zener diodes?
Yes, the TL431CLPX can be used as an excellent replacement for zener diodes in many applications due to its sharp turn-on characteristic.
- What are some common applications of the TL431CLPX?
Common applications include shunt regulation, current limiting, current sourcing, and output control for fixed regulators.
- What is the reference input voltage range for the TL431CLPX?
The reference input voltage range is approximately 2.44 to 2.495 volts.
- Does the TL431CLPX have low output noise?
Yes, the TL431CLPX features low output noise voltage, making it suitable for noise-sensitive applications.
