Overview
The TL431BCDR2, manufactured by onsemi, is a three-terminal adjustable shunt regulator. This device is part of the voltage references category and is known for its high thermal stability over a wide range of temperatures. Introduced in 1999, it has been widely used in various applications requiring precise voltage regulation. The TL431BCDR2 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package and is RoHS compliant, ensuring environmental sustainability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | 2.495V to 36V | V |
| Output Current | 1mA to 100mA | mA |
| Operating Temperature Range | 0°C to 70°C (TA) | °C |
| Package Type | 8-Pin SOIC (Small Outline Integrated Circuit) | |
| Typical Output Impedance | 0.2Ω | Ω |
| Temperature Coefficient | 50ppm/°C Typical | ppm/°C |
| RoHS Compliance | Yes |
Key Features
- Programmable 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 exhibits low output noise, making it suitable for applications requiring high precision.
- Low Dynamic Output Impedance: A typical dynamic impedance of 0.22Ω ensures stable voltage regulation.
- Wide Operating Current Range: The device operates over a wide current range of 1.0 mA to 100 mA.
- High Thermal Stability: The TL431BCDR2 has low output drift versus temperature, ensuring good stability over the entire temperature range.
Applications
- On-Board Regulation: The device is excellent for on-board voltage regulation due to its adjustable output voltage and low output impedance.
- Adjustable Power Supplies: It is widely used in adjustable power supplies and switching power supplies.
- Digital Voltmeters and Op-Amp Circuitry: The TL431BCDR2 is suitable for use in digital voltmeters and op-amp circuitry due to its stable reference voltage.
- Zener Diode Replacement: It can replace Zener diodes in many applications due to its sharp turn-on characteristic and low output noise.
Q & A
- What is the adjustable output voltage range of the TL431BCDR2?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the different grades of the TL431BCDR2 based on initial 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 typical output impedance of the TL431BCDR2?
The typical output impedance is 0.2Ω.
- What is the operating temperature range of the TL431BCDR2?
The operating temperature range is from 0°C to 70°C (TA).
- Is the TL431BCDR2 RoHS compliant?
Yes, the TL431BCDR2 is RoHS compliant.
- What is the package type of the TL431BCDR2?
The device is packaged in an 8-pin SOIC (Small Outline Integrated Circuit).
- What are some common applications of the TL431BCDR2?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, digital voltmeters, and op-amp circuitry.
- Can the TL431BCDR2 replace Zener diodes in some applications?
Yes, it can replace Zener diodes due to its sharp turn-on characteristic and low output noise.
- What is the typical temperature drift of the TL431BCDR2?
The typical temperature drift is 6mV for C temp and 14mV for I and Q temps.
- What is the maximum cathode current of the TL431BCDR2?
The maximum cathode current is 100 mA.
