Overview
The TL431QDCKT is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 family, known for its precision and adjustability. This device offers specified thermal stability over a wide range of temperatures, making it suitable for various applications including automotive, commercial, and military environments. The TL431QDCKT allows for adjustable output voltage between Vref (approximately 2.5V) and 36V using two external resistors, and it features a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many scenarios.
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 36V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
| Typical Output Impedance | 0.2Ω | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Package Type | SOT-SC70 (DCK) | - |
| Pins | 6 | - |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade)
- Adjustable output voltage: Vref to 36V
- Operation from −40°C to 125°C
- Low output noise and typical output impedance of 0.2Ω
- Sink-current capability: 1mA to 100mA
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes
Applications
- Rack server power
- Industrial AC/DC power supplies
- AC inverter and VF drives
- Servo drive control modules
- Notebook PC power adapter designs
- On-board regulation, adjustable power supplies, and switching power supplies
Q & A
- What is the TL431QDCKT?
The TL431QDCKT is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431QDCKT?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the temperature ranges for the TL431QDCKT?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431QDCKT?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431QDCKT?
The sink-current capability ranges from 1mA to 100mA.
- What are some common applications of the TL431QDCKT?
Common applications include rack server power, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- Can the TL431QDCKT replace Zener diodes in some applications?
- What are the different grades of the TL431QDCKT based on reference voltage tolerance?
The device is offered 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 TL431QDCKT?
The TL431QDCKT is packaged in SOT-SC70 (DCK) with 6 pins.
- What is the typical temperature drift of the TL431QDCKT?
The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
