Overview
The TL431BCDR2G is a three-terminal programmable shunt regulator diode produced by onsemi. This device operates as a low temperature coefficient zener that can be programmed from a reference voltage (approximately 2.5 V) to 36 V using two external resistors. It is part of the TL431 series, known for its wide operating current range and low dynamic output impedance, making it an excellent replacement for zener diodes in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Programmable Output Voltage | 2.5 V to 36 V | V |
| Voltage Reference Tolerance (Typ @ 25°C) | ±0.4% | % |
| Dynamic Output Impedance (Typical) | 0.22 Ω | Ω |
| Sink Current Capability | 1.0 mA to 100 mA | mA |
| Equivalent Full-Range Temperature Coefficient (Typical) | 50 ppm/°C | ppm/°C |
| Operating Junction Temperature Range | -40°C to 85°C | °C |
| Package Type | SOIC-8 | - |
| Thermal Resistance, Junction-to-Ambient | 114 °C/W | °C/W |
| Cathode to Anode Voltage | 37 V | V |
Key Features
- Programmable output voltage from 2.5 V to 36 V using 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.
- Rack server power.
- Industrial AC/DC.
- AC inverter & VF drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
Q & A
- What is the programmable output voltage range of the TL431BCDR2G?
The TL431BCDR2G can be programmed to output voltages from 2.5 V to 36 V using two external resistors.
- What is the typical voltage reference tolerance at 25°C for the TL431BCDR2G?
The typical voltage reference tolerance at 25°C is ±0.4%.
- What is the dynamic output impedance of the TL431BCDR2G?
The dynamic output impedance is typically 0.22 Ω.
- What is the sink current capability of the TL431BCDR2G?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the operating junction temperature range for the TL431BCDR2G?
The operating junction temperature range is from -40°C to 85°C.
- What package type is the TL431BCDR2G available in?
The TL431BCDR2G is available in an SOIC-8 package.
- What are some common applications for the TL431BCDR2G?
Common applications include digital voltmeters, power supplies, op amp circuitry, rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter designs.
- Is the TL431BCDR2G Pb-free?
- What is the thermal resistance, junction-to-ambient, for the TL431BCDR2G in an SOIC-8 package?
The thermal resistance, junction-to-ambient, is 114 °C/W for the SOIC-8 package.
- What is the maximum cathode to anode voltage for the TL431BCDR2G?
The maximum cathode to anode voltage is 37 V.
