Overview
The TL431BILP is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high precision and thermal stability across various temperature ranges. The TL431BILP is designed to operate in a wide range of applications, including on-board regulation, adjustable power supplies, and switching power supplies. It offers a stable reference voltage and can be adjusted to output any value between approximately 2.5V and 36V using two external resistors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
| Output Impedance | 0.2Ω Typical | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Package Type | TO-92 (LP) | - |
| Pins | 3 | - |
| Thermal Resistance, Junction-to-Ambient | 178 °C/W (LP package) | °C/W |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- High precision with reference voltage tolerance of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- Low output noise and dynamic impedance of 0.22Ω typical.
- Sink-current capability from 1mA to 100mA.
- Operation over a wide temperature range from -40°C to 125°C.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- On-board regulation and adjustable power supplies.
- Switching power supplies.
- Digital voltmeters and other measurement equipment.
- Op-amp circuitry and other analog circuits requiring stable voltage references.
- Replacement for Zener diodes in various applications.
Q & A
- What is the TL431BILP?
The TL431BILP is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431BILP?
The output voltage can be adjusted from Vref (approximately 2.5V) to 36V using two external resistors.
- What are the reference voltage tolerances for the TL431BILP?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the operating temperature range of the TL431BILP?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431BILP?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431BILP?
The sink-current capability ranges from 1mA to 100mA.
- What package type is the TL431BILP available in?
The TL431BILP is available in the TO-92 (LP) package.
- What are some common applications of the TL431BILP?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, digital voltmeters, and op-amp circuitry.
- Can the TL431BILP replace Zener diodes in some applications?
Yes, the TL431BILP can replace Zener diodes due to its sharp turn-on characteristic and stable voltage reference.
- How does the TL431BILP handle temperature drift?
The device exhibits low output drift versus temperature, with typical temperature drifts of 6mV (C temp) and 14mV (I temp, Q temp).
