Overview
The TL431BVD is a three-terminal programmable shunt regulator diode produced by onsemi. This monolithic IC voltage reference operates as a low temperature coefficient zener that can be programmed from the reference voltage (Vref) to 36 V using two external resistors. It is designed to provide a stable voltage reference and can be used in various applications such as digital voltmeters, power supplies, and op-amp circuitry. The device is particularly useful for obtaining a stable reference from 5.0 V logic supplies and can function as either a positive or negative voltage reference.
Key Specifications
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Cathode to Anode Voltage | VKA | 37 | V |
| Cathode Current Range, Continuous | IK | -100 to +150 | mA |
| Reference Input Current Range, Continuous | Iref | -0.05 to +10 | mA |
| Operating Junction Temperature | TJ | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 to +125 | °C |
| Reference Input Voltage (Typ @ 25°C) | Vref | 2.5 | V |
| Voltage Reference Tolerance (Typ @ 25°C) | ±0.4% | ||
| Dynamic Output Impedance (Typ) | |ZKA| | 0.22 | Ω |
| Sink Current Capability | 1.0 mA to 100 mA | ||
| Temperature Coefficient (Typ) | 50 ppm/°C |
Key Features
- Programmable Output Voltage to 36 V using two external resistors.
- Voltage Reference Tolerance: ±0.4% typical at 25°C.
- Low Dynamic Output Impedance of 0.22 Ω typical.
- Sink Current Capability of 1.0 mA to 100 mA.
- Equivalent Full-Range Temperature Coefficient of 50 ppm/°C typical.
- Temperature Compensated for Operation over Full Rated Operating Temperature Range.
- Low Output Noise Voltage.
- Pb-Free Packages are Available.
Applications
The TL431BVD is versatile and can be used in a variety of applications, including:
- Digital Voltmeters: Providing a stable reference voltage for measurement.
- Power Supplies: Used in feedback control and as a voltage monitor.
- Op-Amp Circuitry: Serving as a stable reference voltage source.
- Constant Current Source/Sink: Utilized in circuits requiring stable current regulation.
- Series Pass Regulator: Employed in linear voltage regulation circuits.
Q & A
- What is the TL431BVD?
The TL431BVD is a three-terminal programmable shunt regulator diode produced by onsemi.
- What is the programmable output voltage range of the TL431BVD?
The output voltage can be programmed from the reference voltage (Vref) to 36 V using two external resistors.
- What is the typical voltage reference tolerance of the TL431BVD at 25°C?
The voltage reference tolerance is ±0.4% typical at 25°C.
- What is the dynamic output impedance of the TL431BVD?
The dynamic output impedance is 0.22 Ω typical.
- What is the sink current capability of the TL431BVD?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the temperature coefficient of the TL431BVD?
The equivalent full-range temperature coefficient is 50 ppm/°C typical.
- What are the operating temperature ranges for the TL431BVD?
The operating ambient temperature range is -40°C to +125°C.
- Can the TL431BVD be used as a positive or negative voltage reference?
Yes, it can be used as either a positive or negative voltage reference.
- In what types of applications is the TL431BVD commonly used?
It is commonly used in digital voltmeters, power supplies, op-amp circuitry, and as a constant current source/sink.
- Is the TL431BVD available in Pb-Free packages?
Yes, Pb-Free packages are available for the TL431BVD.
