Overview
The TL431CPG, produced by onsemi, is a three-terminal programmable shunt regulator diode. It operates as a low temperature coefficient zener diode that can be programmed from 2.5 V to 36 V using two external resistors. This device is highly versatile and is used in various applications where a stable and non-standard reference voltage is required. The TL431CPG is known for its wide operating current range of 1.0 mA to 100 mA and its low dynamic output impedance of 0.22 Ω typical, making it an excellent replacement for traditional zener diodes in many circuits.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Reference Input Voltage | Vref | 2.44 | 2.495 | 2.55 | V |
| Cathode to Anode Voltage | VKA | - | - | 37 | V |
| Cathode Current Range | IK | -100 | - | 150 | mA |
| Reference Input Current Range | Iref | -0.05 | - | 10 | mA |
| Operating Junction Temperature | TJ | - | - | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 85 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
| Total Power Dissipation @ TA = 25°C | PD | - | - | 0.70 | W |
| Thermal Resistance, Junction-to-Ambient | RθJA | - | - | 178 | °C/W |
| Temperature Coefficient | - | - | - | 50 ppm/°C | - |
Key Features
- Programmable output voltage from 2.5 V to 36 V using two external resistors.
- 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
- Reference voltage in circuits where a non-standard reference voltage is needed).
- Feedback control for driving an optocoupler in power supplies).
- Voltage monitor, constant current source, constant current sink, and series pass regulator).
- Digital voltmeters, power supplies, and op-amp circuitry).
Q & A
- What is the TL431CPG and how does it operate?
The TL431CPG is a three-terminal programmable shunt regulator diode that operates as a low temperature coefficient zener diode. It can be programmed from 2.5 V to 36 V using two external resistors.
- What is the operating current range of the TL431CPG?
The TL431CPG has an operating current range of 1.0 mA to 100 mA.
- What is the typical dynamic output impedance of the TL431CPG?
The typical dynamic output impedance is 0.22 Ω.
- What is the temperature coefficient of the TL431CPG?
The temperature coefficient is 50 ppm/°C typical).
- What are the typical applications of the TL431CPG?
Typical applications include reference voltage in non-standard circuits, feedback control in power supplies, voltage monitoring, constant current sources and sinks, and series pass regulators).
- What is the maximum cathode to anode voltage for the TL431CPG?
The maximum cathode to anode voltage is 37 V).
- What is the operating junction temperature range for the TL431CPG?
The operating junction temperature range is up to 150 °C).
- Is the TL431CPG available in Pb-free packages?
- How does the TL431CPG handle temperature variations?
The TL431CPG is temperature compensated for operation over its full rated operating temperature range).
- What is the significance of the low output noise voltage in the TL431CPG?
The low output noise voltage ensures stable and reliable operation in various applications).
