Overview
The TL431CLP is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This device is known for its thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431CLP allows for the output voltage to be set to any value between the reference voltage (approximately 2.5V) 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 |
|---|---|
| Package Type | TO-92 (LP) |
| Pins | 3 |
| Operating Temperature Range | −40°C to 125°C |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref to 36V |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
| Output Impedance | 0.2Ω (typical) |
| Sink-Current Capability | 1mA to 100mA |
Key Features
- Adjustable output voltage: Vref to 36V with two external resistors.
- Operation from −40°C to 125°C.
- Low output noise.
- Typical output impedance of 0.2Ω.
- Sink-current capability: 1mA to 100mA.
- Sharp turn-on characteristic due to active output circuitry.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
The TL431CLP is versatile and can be used in various applications, including:
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Replacing Zener diodes in many circuits.
Q & A
- What is the operating temperature range of the TL431CLP?
The TL431CLP operates from −40°C to 125°C. - How is the output voltage of the TL431CLP adjusted?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors. - What are the initial tolerance grades available for the TL431CLP?
The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C. - What is the typical output impedance of the TL431CLP?
The typical output impedance is 0.2Ω. - What is the sink-current capability of the TL431CLP?
The sink-current capability ranges from 1mA to 100mA. - Can the TL431CLP replace Zener diodes in circuits?
Yes, the TL431CLP is an excellent replacement for Zener diodes due to its sharp turn-on characteristic and active output circuitry. - What package type is the TL431CLP available in?
The TL431CLP is available in the TO-92 (LP) package type. - How many pins does the TL431CLP have?
The TL431CLP has 3 pins. - What are some common applications of the TL431CLP?
Common applications include on-board regulation, adjustable power supplies, and switching power supplies. - Does the TL431CLP have low output noise?
Yes, the TL431CLP features low output noise.
