Overview
The TL431BCPG is a three-terminal programmable shunt regulator diode produced by onsemi. This monolithic IC voltage reference operates as a low temperature coefficient zener, which can be programmed from 2.5 V to 36 V using two external resistors. It is designed to replace zener diodes in various applications, offering a wide operating current range of 1.0 mA to 100 mA and a typical dynamic impedance of 0.22 Ω. The TL431BCPG is particularly useful in digital voltmeters, power supplies, and op-amp circuitry due to its stable reference voltage and low output noise.
Key Specifications
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Reference Input Voltage | Vref | 2.44 - 2.495 | V |
| Voltage Reference Tolerance | ±0.4% (Typ @ 25°C) | % | |
| Dynamic Output Impedance | 0.22 Ω (Typical) | Ω | |
| Sink Current Capability | 1.0 mA to 100 mA | mA | |
| Temperature Coefficient | 50 ppm/°C (Typical) | ppm/°C | |
| Cathode to Anode Voltage | VKA | 37 V | V |
| Operating Junction Temperature | TJ | -40°C to +125°C | °C |
| Operating Ambient Temperature Range | TA | -40°C to +85°C (TL431C) | °C |
Key Features
- Programmable Output Voltage to 36 V
- Voltage Reference Tolerance: ±0.4% (Typ @ 25°C)
- Low Dynamic Output Impedance: 0.22 Ω (Typical)
- Sink Current Capability: 1.0 mA to 100 mA
- Equivalent Full-Range Temperature Coefficient: 50 ppm/°C (Typical)
- Temperature Compensated for Operation over Full Rated Operating Temperature Range
- Low Output Noise Voltage
- Pb-Free Packages are Available
- AEC-Q100 Qualified and PPAP Capable for Automotive Applications
Applications
- Digital Voltmeters
- Power Supplies
- Op-Amp Circuitry
- Automotive Systems
- Industrial Equipment
Q & A
- What is the TL431BCPG used for?
The TL431BCPG is used as a programmable shunt regulator diode, replacing zener diodes in applications such as digital voltmeters, power supplies, and op-amp circuitry.
- What is the programmable output voltage range of the TL431BCPG?
The output voltage can be programmed from 2.5 V to 36 V using two external resistors.
- What is the typical dynamic impedance of the TL431BCPG?
The typical dynamic impedance is 0.22 Ω.
- What is the sink current capability of the TL431BCPG?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the temperature coefficient of the TL431BCPG?
The equivalent full-range temperature coefficient is 50 ppm/°C (Typical).
- Is the TL431BCPG suitable for automotive applications?
- What is the operating ambient temperature range for the TL431BCPG?
The operating ambient temperature range is -40°C to +85°C for the TL431C version and up to +125°C for some automotive versions.
- Is the TL431BCPG Pb-Free and RoHS compliant?
- What is the maximum cathode to anode voltage for the TL431BCPG?
The maximum cathode to anode voltage is 37 V.
- What is the typical reference input voltage for the TL431BCPG?
The typical reference input voltage is 2.495 V.
