Overview
The TL431ILPRPG, 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 ranging from the reference voltage (approximately 2.5V) to 36V using two external resistors. The device is known for its thermal stability and wide operating current range, making it an excellent replacement for traditional zener diodes in various applications.
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 | -40 | - | 85 |
| Reference Input Voltage | Vref | V | 2.44 | 2.495 | 2.55 |
| Dynamic Impedance | |ZKA| | Ω | 0.22 | - | 0.5 |
| Off-State Cathode Current | Ioff | nA | 20 | - | 1000 |
Key Features
- Programmable Output Voltage: Adjustable from Vref (approximately 2.5V) to 36V using two external resistors.
- Reference Voltage Tolerance: Available in 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- Wide Operating Current Range: From 1.0 mA to 100 mA.
- Low Dynamic Output Impedance: Typical value of 0.22 Ω.
- Low Output Noise: Suitable for applications requiring stable and quiet voltage references.
- Temperature Stability: Operates over a wide temperature range from -40°C to 125°C, with low temperature drift.
- Pb-Free Packages Available: Compliant with lead-free requirements.
Applications
- On-Board Regulation: Used in various board-level voltage regulation applications.
- Adjustable Power Supplies: Ideal for designing adjustable power supplies with stable output voltages.
- Switching Power Supplies: Utilized in switching power supply designs for efficient voltage regulation.
- Digital Voltmeters and Op Amp Circuitry: Used as a stable voltage reference in digital voltmeters and operational amplifier circuits.
Q & A
- What is the TL431ILPRPG used for?
The TL431ILPRPG is used as a three-terminal programmable shunt regulator diode, often replacing traditional zener diodes in various applications.
- What is the adjustable output voltage range of the TL431ILPRPG?
The output voltage can be adjusted from approximately 2.5V to 36V using two external resistors.
- What are the different grades of the TL431ILPRPG based on reference voltage tolerance?
The device is available in 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the operating current range of the TL431ILPRPG?
The device operates over a current range of 1.0 mA to 100 mA.
- What is the typical dynamic impedance of the TL431ILPRPG?
The typical dynamic impedance is 0.22 Ω.
- What is the operating temperature range of the TL431ILPRPG?
The device operates from -40°C to 85°C.
- Is the TL431ILPRPG suitable for high-temperature applications?
Yes, it is suitable for applications requiring operation over a wide temperature range, including high temperatures up to 85°C.
- What are some common applications of the TL431ILPRPG?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, digital voltmeters, and op amp circuitry.
- Does the TL431ILPRPG have low output noise?
Yes, the device is known for its low output noise, making it suitable for applications requiring stable and quiet voltage references.
- Are Pb-free packages available for the TL431ILPRPG?
Yes, Pb-free packages are available, making the device compliant with lead-free requirements.
