Overview
The TL431BCPKG3 is a precision programmable reference voltage regulator produced by Texas Instruments. It is part of the TL431 and TL432 series, which are three-terminal adjustable shunt regulators known for their high thermal stability and versatility in various applications. The TL431BCPKG3 is specifically the B-grade version, offering a reference voltage tolerance of 0.5% at 25°C. This component is widely used in electronic circuits requiring stable and adjustable voltage references.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% | - |
| Adjustable Output Voltage | Vref to 36 V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-89 (PK) | - |
| Body Size | 2.90 mm × 1.30 mm | mm |
Key Features
- Precision Reference Voltage: The TL431BCPKG3 offers a high precision reference voltage with a tolerance of 0.5% at 25°C, making it suitable for applications requiring stable voltage references.
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- Wide Operating Temperature Range: The device operates from −40°C to 125°C, ensuring good stability over a broad temperature range.
- Low Output Noise and Impedance: It features low output noise and a typical output impedance of 0.2 Ω, enhancing its performance in noise-sensitive applications.
- Sink-Current Capability: The device can sink currents from 1 mA to 100 mA, making it versatile for various load conditions.
Applications
- Rack Server Power: Used in power supply designs for rack servers due to its high precision and stability.
- Industrial AC/DC and Inverter Systems: Suitable for industrial power supplies, AC/DC converters, and inverter systems.
- Servo Drive Control Modules: Employed in servo drive control systems where precise voltage references are crucial.
- Notebook PC Power Adapters: Used in the design of power adapters for notebook PCs to ensure stable and efficient power delivery.
- Adjustable Voltage and Current Referencing: General use in any application requiring adjustable and precise voltage or current references.
Q & A
- What is the reference voltage tolerance of the TL431BCPKG3 at 25°C?
The reference voltage tolerance is 0.5% at 25°C for the B-grade version.
- What is the adjustable output voltage range of the TL431BCPKG3?
The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V.
- What is the operating temperature range of the TL431BCPKG3?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431BCPKG3?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BCPKG3?
The device can sink currents from 1 mA to 100 mA.
- In what package type is the TL431BCPKG3 available?
The TL431BCPKG3 is available in the SOT-89 (PK) package.
- What are some common applications of the TL431BCPKG3?
Common applications include rack server power, industrial AC/DC and inverter systems, servo drive control modules, and notebook PC power adapters.
- How does the TL431BCPKG3 compare to Zener diodes in terms of performance?
The TL431BCPKG3 offers a sharper turn-on characteristic and better thermal stability compared to Zener diodes, making it an excellent replacement in many applications.
- Is the TL431BCPKG3 suitable for use in safety-critical applications?
It is important to consult the datasheet and ensure compliance with all safety and regulatory requirements before using the TL431BCPKG3 in safety-critical applications.
- Where can I find detailed specifications and documentation for the TL431BCPKG3?
Detailed specifications and documentation can be found on the Texas Instruments website and through authorized distributors like Digi-Key and Mouser.
