Overview
The TL431ILPR5, produced by Texas Instruments, is a three-terminal adjustable precision shunt regulator. This device is part of the TL431 series, known for its high accuracy and thermal stability over a wide range of temperatures. The TL431ILPR5 is designed to provide a programmable output voltage that can be set between the reference voltage (approximately 2.5V) and 36V using two external resistors. This versatility makes it suitable for various applications, including shunt regulation, series regulation, switching regulators, and voltage references.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | - | % | 0.5 (B grade) | - | 2 (Standard grade) |
| Adjustable Output Voltage | - | V | Vref (2.5V) | - | 36V |
| Operating Temperature Range | - | °C | -40 | - | 125 |
| Typical Temperature Drift | - | mV | 6 (C temp) | - | 14 (I temp, Q temp) |
| Output Impedance | - | Ω | - | 0.2 | - |
| Sink-Current Capability | - | mA | 1 | - | 100 |
| Thermal Resistance, Junction-to-Ambient | RJA | °C/W | - | - | 178 (TO-92 package) |
Key Features
- Programmable output voltage to 36V with two external resistors.
- Low dynamic output impedance of 0.2Ω.
- Sink-current capability of 1.0 to 100mA.
- Equivalent full-range temperature coefficient of 50ppm/°C typical.
- Low output noise.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Guaranteed thermal stability over applicable temperature ranges.
Applications
- Shunt regulators.
- Series regulators.
- Switching regulators.
- Voltage references.
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431ILPR5 used for?
The TL431ILPR5 is used as a three-terminal adjustable precision shunt regulator, suitable for various applications including shunt regulation, series regulation, switching regulators, and voltage references.
- What is the adjustable output voltage range of the TL431ILPR5?
The output voltage can be set to any value between the reference voltage (approximately 2.5V) and 36V using two external resistors.
- What are the temperature tolerance grades for the TL431ILPR5?
The device is available in three grades with initial tolerances (at 25°C) of 0.5%, 1%, and 2% for the B, A, and standard grades, respectively.
- What is the operating temperature range of the TL431ILPR5?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431ILPR5?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431ILPR5?
The sink-current capability ranges from 1mA to 100mA.
- How does the TL431ILPR5 compare to Zener diodes?
The TL431ILPR5 has active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are some common applications of the TL431ILPR5?
Common applications include on-board regulation, adjustable power supplies, and switching power supplies.
- Is the TL431ILPR5 RoHS compliant?
- What is the package type for the TL431ILPR5?
The device is available in a TO-92 package.
