Overview
The TL431BIDR2 is a three-terminal programmable shunt regulator diode produced by onsemi. This device operates as a low temperature coefficient zener diode that can be programmed to output voltages from 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 of 1.0 mA to 100 mA and a typical dynamic impedance of 0.22 Ω. The TL431BIDR2 is suitable for various applications, including digital voltmeters, power supplies, and op-amp circuitry, due to its stable reference voltage and low output noise.
Key Specifications
| Characteristic | Value | Unit |
|---|---|---|
| Reference Input Voltage (Typical at 25°C) | 2.495 | V |
| Adjustable Output Voltage Range | 2.5 V to 36 V | V |
| Reference Voltage Tolerance (TL431B at 25°C) | ±0.5% | % |
| Dynamic Output Impedance (Typical) | 0.22 Ω | Ω |
| Sink Current Capability | 1.0 mA to 100 mA | mA |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | SOIC-8 | |
| Thermal Resistance, Junction-to-Ambient | 114 °C/W | °C/W |
Key Features
- Programmable output voltage from approximately 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.
- Low output noise voltage.
- Temperature compensated for operation over the full rated operating temperature range.
- Equivalent full-range temperature coefficient of 50 ppm/°C typical.
- Available in Pb-free packages.
Applications
- Digital voltmeters.
- Power supplies, including on-board regulation and adjustable power supplies.
- Op-amp circuitry.
- Switching power supplies.
- Replacement for zener diodes in various applications.
Q & A
- What is the adjustable output voltage range of the TL431BIDR2?
The TL431BIDR2 can be programmed to output voltages from approximately 2.5 V to 36 V using two external resistors.
- What is the typical dynamic output impedance of the TL431BIDR2?
The typical dynamic output impedance is 0.22 Ω.
- What is the sink current capability of the TL431BIDR2?
The sink current capability ranges from 1.0 mA to 100 mA.
- What is the operating temperature range of the TL431BIDR2?
The operating temperature range is from -40°C to 85°C.
- What package type is the TL431BIDR2 available in?
The TL431BIDR2 is available in an SOIC-8 package.
- What is the reference voltage tolerance of the TL431B at 25°C?
The reference voltage tolerance is ±0.5% for the TL431B grade.
- Is the TL431BIDR2 suitable for automotive applications?
- What is the thermal resistance, junction-to-ambient, for the SOIC-8 package?
The thermal resistance, junction-to-ambient, is 114 °C/W for the SOIC-8 package.
- Does the TL431BIDR2 have low output noise?
- Can the TL431BIDR2 be used as a replacement for zener diodes?
