Overview
The TL431IDG, produced by onsemi, is a three-terminal programmable shunt regulator diode. It operates as a low temperature coefficient zener diode that can be programmed to output voltages from the internal reference voltage (approximately 2.5V) up to 36V using two external resistors. This device is known for its thermal stability over a wide range of operating temperatures, making it versatile for various applications.
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, Continuous | IK | -100 | 150 | mA | |
| Reference Input Current Range, Continuous | Iref | -0.05 | 10 | mA | |
| Operating Junction Temperature | TJ | 150 | °C | ||
| Operating Ambient Temperature Range | TA | -40 | 85 | °C | |
| Dynamic Impedance | |ZKA| | 0.22 | 0.5 | Ω | |
| Off-State Cathode Current | Ioff | 20 | 1000 | nA |
Key Features
- Programmable output voltage up to 36V with two external resistors.
- Voltage reference tolerance: ±0.4% typical at 25°C (TL431B).
- Low dynamic output impedance: 0.22 Ω typical.
- Sink current capability: 1.0 mA to 100 mA.
- Equivalent full-range temperature coefficient: 50 ppm/°C typical.
- Temperature compensated for operation over full rated operating temperature range.
- Low output noise voltage.
- AEC-Q100 qualified and PPAP capable for automotive and other critical applications.
- Pb-free, halogen-free/BFR-free, and RoHS compliant).
Applications
The TL431IDG is versatile and can be used in a variety of applications, including:
- Shunt regulators and series regulators.
- Switching regulators and voltage references).
- Feedback control for driving optocouplers in power supplies).
- Digital voltmeters and op-amp circuitry).
- Power supplies where a stable and adjustable reference voltage is required).
Q & A
- What is the TL431IDG?
The TL431IDG is a three-terminal programmable shunt regulator diode produced by onsemi.
- What is the programmable output voltage range of the TL431IDG?
The output voltage can be set to any value between the internal reference voltage (approximately 2.5V) and 36V using two external resistors.
- What is the typical dynamic impedance of the TL431IDG?
The typical dynamic impedance is 0.22 Ω.
- What is the sink current capability of the TL431IDG?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the operating ambient temperature range for the TL431IDG?
The operating ambient temperature range is -40°C to 85°C.
- Is the TL431IDG RoHS compliant?
- What are some common applications of the TL431IDG?
- What is the maximum cathode to anode voltage for the TL431IDG?
- What is the typical reference input voltage tolerance at 25°C for the TL431B series?
- Is the TL431IDG suitable for automotive applications?
