Overview
The TL431BIDCKR is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TL431 family, known for its high accuracy and stability. The TL431BIDCKR is characterized by its ability to set the output voltage to any value between the reference voltage (approximately 2.495 V) and 36 V using two external resistors. This makes it highly versatile for various applications requiring precise voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (Vref) | 2.495 | V |
| Reference Voltage Tolerance at 25°C | ±0.5% | % |
| Adjustable Output Voltage Range | Vref to 36 V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Typical Temperature Drift | 14 mV (I temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SC70-6 | - |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between the reference voltage (approximately 2.495 V) and 36 V using two external resistors.
- High Accuracy: Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- Low Output Noise: Ensures stable operation in noise-sensitive applications.
- Low Output Impedance: Typical output impedance of 0.2 Ω.
- Sink-Current Capability: Can sink currents from 1 mA to 100 mA.
- Wide Operating Temperature Range: Operates from -40°C to 85°C.
Applications
- On-Board Regulation: Ideal for regulating voltage on printed circuit boards.
- Adjustable Power Supplies: Used in power supplies where the output voltage needs to be adjustable.
- Switching Power Supplies: Can replace Zener diodes in switching power supply designs.
- Automotive and Industrial Systems: Suitable for use in automotive and industrial applications due to its wide operating temperature range and high stability.
Q & A
- What is the reference voltage of the TL431BIDCKR?
The reference voltage (Vref) is approximately 2.495 V.
- What is the adjustable output voltage range of the TL431BIDCKR?
The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V.
- What are the different grades of the TL431 family based on reference voltage tolerance?
The TL431 family is available in three grades: B grade (0.5% tolerance), A grade (1% tolerance), and standard grade (2% tolerance).
- What is the typical output impedance of the TL431BIDCKR?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BIDCKR?
The device can sink currents from 1 mA to 100 mA.
- What is the operating temperature range of the TL431BIDCKR?
The device operates from -40°C to 85°C.
- How is the output voltage of the TL431BIDCKR adjusted?
The output voltage is adjusted using two external resistors.
- What are some common applications of the TL431BIDCKR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and automotive and industrial systems.
- What package type is the TL431BIDCKR available in?
The TL431BIDCKR is available in the SC70-6 package.
- Why is the TL431BIDCKR preferred over Zener diodes in some applications?
The TL431BIDCKR is preferred due to its high accuracy, low output noise, and sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
