Overview
The TL431IDR2 from onsemi is a three-terminal adjustable shunt regulator, part of the TL431 series. This device operates as a low temperature coefficient zener diode that can be programmed to output voltages between approximately 2.5V and 36V using two external resistors. It is designed for a wide range of applications, including on-board regulation, adjustable power supplies, and switching power supplies. The TL431IDR2 is available in an 8-pin SOIC package and is suitable for automotive, commercial, and industrial environments due to its specified thermal stability over various temperature ranges.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | - |
| Adjustable Output Voltage | Vref to 36V | V |
| Sink Current Capability | 1 mA to 100 mA | mA |
| Typical Output Impedance | 0.2 Ω | Ω |
| Cathode to Anode Voltage | 37 V | V |
| Operating Junction Temperature | 150 °C | °C |
| Storage Temperature Range | -65 to 150 °C | °C |
Key Features
- Programmable output voltage from approximately 2.5V to 36V using two external resistors.
- Voltage reference tolerance at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- Low dynamic output impedance of 0.22 Ω typical.
- Sink current capability from 1 mA to 100 mA.
- Operation from -40°C to 125°C, making it suitable for various environmental conditions.
- Low output noise and typical temperature drift of 6 mV (C temp) and 14 mV (I temp, Q temp).
- Pb-Free packages available.
Applications
- On-board regulation and adjustable power supplies.
- Switching power supplies and servo drive control modules.
- Digital voltmeters and op-amp circuitry).
- Rack server power, industrial AC/DC, AC inverter & VF drives, and notebook PC power adapter designs).
- Feedback control for driving an optocoupler in power supplies, voltage monitoring, constant current sources, and series pass regulators).
Q & A
- What is the TL431IDR2 used for?
The TL431IDR2 is used as a three-terminal adjustable shunt regulator, often replacing Zener diodes in various applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431IDR2?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors).
- What are the temperature ranges for the TL431IDR2?
The device operates from -40°C to 125°C and has a storage temperature range of -65°C to 150°C).
- What is the typical output impedance of the TL431IDR2?
The typical output impedance is 0.2 Ω).
- What are the voltage reference tolerances for the TL431IDR2?
The voltage reference tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C).
- What is the sink current capability of the TL431IDR2?
The sink current capability ranges from 1 mA to 100 mA).
- Is the TL431IDR2 suitable for automotive applications?
- What package type is the TL431IDR2 available in?
The TL431IDR2 is available in an 8-pin SOIC package).
- Does the TL431IDR2 have low output noise?
- Are Pb-Free packages available for the TL431IDR2?
