Overview
The TL431BCDG is a three-terminal adjustable shunt regulator produced by onsemi. This monolithic IC voltage reference operates as a low temperature coefficient zener, which can be programmed from the reference voltage (approximately 2.5V) to 36V using two external resistors. It is designed to offer high stability and low output noise, making it an excellent replacement for zener diodes in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.4% | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Sink Current Capability | 1.0 mA to 100 mA | mA |
| Dynamic Output Impedance | 0.22 Ω (Typical) | Ω |
| Temperature Coefficient | 50 ppm/°C (Typical) | ppm/°C |
| Package Type | SOIC-8 |
Key Features
- Programmable output voltage from Vref (approximately 2.5V) to 36V with two external resistors.
- Low dynamic output impedance of 0.22 Ω (typical).
- Sink current capability of 1.0 mA to 100 mA.
- Equivalent full-range temperature coefficient of 50 ppm/°C (typical).
- Temperature compensated for operation over the full rated operating temperature range.
- Low output noise voltage.
- Pb-free packages available.
Applications
- Digital voltmeters.
- Power supplies.
- Op-amp circuitry.
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
Q & A
- What is the adjustable output voltage range of the TL431BCDG?
The TL431BCDG can be programmed to output voltages from Vref (approximately 2.5V) to 36V using two external resistors.
- What is the reference voltage tolerance at 25°C for the TL431BCDG?
The reference voltage tolerance at 25°C is 0.4% for the B grade.
- What is the operating temperature range of the TL431BCDG?
The operating temperature range is from -40°C to 125°C.
- What is the sink current capability of the TL431BCDG?
The sink current capability is from 1.0 mA to 100 mA.
- What is the typical dynamic output impedance of the TL431BCDG?
The typical dynamic output impedance is 0.22 Ω.
- Is the TL431BCDG suitable for replacing zener diodes?
Yes, it is an excellent replacement for zener diodes in many applications due to its low output noise and sharp turn-on characteristic.
- What types of packages are available for the TL431BCDG?
The TL431BCDG is available in SOIC-8 and other package types such as TO-92 and PDIP-8.
- Does the TL431BCDG have Pb-free packages available?
Yes, Pb-free packages are available for the TL431BCDG.
- What are some common applications of the TL431BCDG?
Common applications include digital voltmeters, power supplies, op-amp circuitry, on-board regulation, adjustable power supplies, and switching power supplies.
- How does the TL431BCDG handle temperature variations?
The TL431BCDG is temperature compensated for operation over the full rated operating temperature range, with a temperature coefficient of 50 ppm/°C (typical).
