Overview
The TL431ACLPREG, produced by onsemi, is a three-terminal programmable shunt regulator diode. This monolithic IC operates as a low temperature coefficient zener diode, which can be programmed to output voltages from 2.5 V to 36 V using two external resistors. It is part of the TL431A and B series, known for their precision and versatility in various electronic applications.
The device is characterized by its wide operating current range of 1.0 mA to 100 mA and a typical dynamic impedance of 0.22 Ω, making it an excellent replacement for traditional zener diodes in many circuits.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Cathode to Anode Voltage | VKA | V | - | - | 37 |
| Cathode Current Range, Continuous | IK | mA | -100 | - | 150 |
| Reference Input Current Range, Continuous | Iref | mA | -0.05 | - | 10 |
| Operating Junction Temperature | TJ | °C | - | - | 150 |
| Operating Ambient Temperature Range | TA | °C | 0 | - | 70 |
| Reference Input Voltage | Vref | V | 2.44 | 2.495 | 2.55 |
| Dynamic Impedance | |ZKA| | Ω | 0.22 | - | 0.5 |
| Thermal Resistance, Junction-to-Ambient | RθJA | °C/W | 178 | - | - |
Key Features
- Programmable output voltage from 2.5 V to 36 V using two external resistors.
- Wide operating current range of 1.0 mA to 100 mA.
- 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 the full rated operating temperature range.
- Low output noise voltage.
- Pb-free packages available.
Applications
- Digital voltmeters.
- Power supplies.
- Op-amp circuitry.
- Any application requiring a stable and adjustable voltage reference.
Q & A
- What is the TL431ACLPREG used for?
The TL431ACLPREG is used as a programmable precision voltage reference and shunt regulator in various electronic circuits.
- What is the programmable voltage range of the TL431ACLPREG?
The TL431ACLPREG can be programmed to output voltages from 2.5 V to 36 V using two external resistors.
- What is the operating current range of the TL431ACLPREG?
The operating current range is from 1.0 mA to 100 mA.
- What is the typical dynamic impedance of the TL431ACLPREG?
The typical dynamic impedance is 0.22 Ω.
- What is the maximum junction temperature for the TL431ACLPREG?
The maximum junction temperature is 150 °C.
- What is the operating ambient temperature range for the TL431ACLPREG?
The operating ambient temperature range is from 0 °C to 70 °C.
- Is the TL431ACLPREG available in Pb-free packages?
- What are some common applications of the TL431ACLPREG?
- How does the TL431ACLPREG compare to traditional zener diodes?
The TL431ACLPREG offers better precision and a wider range of programmable voltages compared to traditional zener diodes.
- What is the thermal resistance of the TL431ACLPREG?
The thermal resistance (junction-to-ambient) is 178 °C/W for the TO-92 package.
