Overview
The TL431BCLPRA 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 temperature compensated for operation over its full rated operating temperature range and offers low output noise voltage and low dynamic output impedance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Programmable Output Voltage | Vref to 36 | V |
| Voltage Reference Tolerance (Typ @ 25°C) | ±0.4% | % |
| Dynamic Output Impedance (Typical) | 0.22 | Ω |
| Sink Current Capability | 1.0 mA to 100 mA | mA |
| Equivalent Full-Range Temperature Coefficient (Typical) | 50 ppm/°C | ppm/°C |
| Operating Junction Temperature | -40 to +125 | °C |
| Operating Ambient Temperature Range | -40 to +70 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| Package Type | TO-92 |
Key Features
- Programmable output voltage from Vref to 36 V using two external resistors.
- Voltage reference tolerance of ±0.4% typical at 25°C for the TL431B model.
- Low dynamic output impedance of 0.22 Ω typical.
- Sink current capability ranging from 1.0 mA to 100 mA.
- Equivalent full-range temperature coefficient of 50 ppm/°C typical.
- Temperature compensated for operation over the full rated operating temperature range.
- Low output noise voltage.
- Pb-free packages available.
Applications
The TL431BCLPRA is versatile and can be used in a variety of applications, including:
- Digital voltmeters.
- Power supplies.
- Op-amp circuitry.
- Feedback control for driving an optocoupler in power supplies.
- Voltage monitoring.
- Constant current source and sink.
- Series pass regulator.
Q & A
- What is the programmable output voltage range of the TL431BCLPRA?
The TL431BCLPRA can be programmed to output voltages from Vref to 36 V using two external resistors.
- What is the typical voltage reference tolerance of the TL431B model at 25°C?
The typical voltage reference tolerance is ±0.4% at 25°C for the TL431B model.
- What is the dynamic output impedance of the TL431BCLPRA?
The dynamic output impedance is typically 0.22 Ω.
- What is the sink current capability of the TL431BCLPRA?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the temperature coefficient of the TL431BCLPRA?
The equivalent full-range temperature coefficient is 50 ppm/°C typical.
- What are the operating temperature ranges for the TL431BCLPRA?
The operating junction temperature range is -40 to +125°C, and the operating ambient temperature range is -40 to +70°C.
- What types of packages are available for the TL431BCLPRA?
The TL431BCLPRA is available in TO-92 packages.
- Can the TL431BCLPRA be used as a positive or negative voltage reference?
Yes, the TL431BCLPRA can be used as either a positive or negative voltage reference since it operates as a shunt regulator.
- What are some common applications of the TL431BCLPRA?
Common applications include digital voltmeters, power supplies, op-amp circuitry, and feedback control in power supplies.
- Is the TL431BCLPRA Pb-free?
Yes, Pb-free packages are available for the TL431BCLPRA.
