Overview
The TL431CDBVRG4 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 TL431CDBVRG4 can be used to set an output voltage between approximately 2.5V (Vref) and 36V using two external resistors, providing a high degree of flexibility in voltage regulation.
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 (Q grade) | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω (typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-23-5 | - |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- Low Output Noise: The device features low output noise, making it suitable for applications requiring stable voltage regulation.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- Thermal Stability: Specified thermal stability over a wide temperature range, ensuring good stability over the entire temperature range.
- High Accuracy: Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
Applications
- Rack Server Power: Used in power supply designs for rack servers due to its high accuracy and thermal stability.
- Industrial AC/DC: Suitable for industrial AC/DC power supplies and converters.
- AC Inverter & VF Drives: Applied in AC inverter and variable frequency drive systems.
- Servo Drive Control Module: Used in servo drive control modules for precise voltage regulation.
- Notebook PC Power Adapter Design: Utilized in power adapter designs for notebook PCs.
Q & A
- What is the TL431CDBVRG4?
The TL431CDBVRG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments, part of the TL431 family.
- What is the adjustable output voltage range of the TL431CDBVRG4?
The output voltage can be set to any value between approximately 2.5V (Vref) and 36V using two external resistors.
- What are the temperature ranges for the TL431 devices?
The devices are characterized for operation from −40°C to 125°C (Q grade), 0°C to 70°C (C grade), and −40°C to 85°C (I grade).
- What is the typical output impedance of the TL431CDBVRG4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431CDBVRG4?
The sink-current capability ranges from 1 mA to 100 mA.
- What are the common applications of the TL431CDBVRG4?
Common applications include rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431CDBVRG4 compare to Zener diodes?
The TL431CDBVRG4 provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the different grades of the TL431 devices?
The devices are available in three grades with initial tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the package type of the TL431CDBVRG4?
The package type is SOT-23-5.
- How does the TL431CDBVRG4 ensure thermal stability?
The device has specified thermal stability over a wide temperature range, ensuring good stability over the entire temperature range.
