Overview
The TL431ILPRAG is a three-terminal programmable shunt regulator diode produced by onsemi. This monolithic IC operates as a low temperature coefficient zener that can be programmed from the reference voltage (Vref) to 36 V using two external resistors. It is designed to provide a stable voltage reference and can be used as either a positive or negative voltage reference. The device is suitable for a wide range of applications due to its adjustable output voltage, low dynamic output impedance, and temperature-compensated operation over its full rated operating temperature range.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Cathode to Anode Voltage | VKA | 37 | V | ||
| Cathode Current Range, Continuous | IK | -100 | 150 | mA | |
| Reference Input Current Range, Continuous | Iref | -0.05 | 10 | mA | |
| Operating Junction Temperature | TJ | 150 | °C | ||
| Operating Ambient Temperature Range | TA | -40 | 85 | °C | |
| Reference Input Voltage | Vref | 2.44 | 2.495 | 2.55 | V |
| Dynamic Impedance | |ZKA| | 0.22 | 0.5 | Ω | |
| Off-State Cathode Current | Ioff | 20 | 1000 | nA |
Key Features
- Programmable Output Voltage to 36 V
- Voltage Reference Tolerance: ±0.4% (Typ @ 25°C for TL431B)
- Low Dynamic Output Impedance, 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 Full Rated Operating Temperature Range
- Low Output Noise Voltage
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant
Applications
- Rack server power
- Industrial AC/DC power supplies
- AC inverter & VF drives
- Servo drive control modules
- Notebook PC power adapter designs
- Digital voltmeters
- Op amp circuitry
Q & A
- What is the TL431ILPRAG used for?
The TL431ILPRAG is used as a programmable shunt regulator diode, providing a stable voltage reference that can be adjusted from the reference voltage to 36 V using external resistors.
- What is the operating current range of the TL431ILPRAG?
The operating current range is from 1.0 mA to 100 mA.
- What is the typical dynamic impedance of the TL431ILPRAG?
The typical dynamic impedance is 0.22 Ω.
- What is the temperature range for the TL431ILPRAG?
The operating ambient temperature range is from -40°C to 85°C.
- Is the TL431ILPRAG RoHS compliant?
- What are some common applications of the TL431ILPRAG?
Common applications include rack server power, industrial AC/DC power supplies, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431ILPRAG compare to traditional zener diodes?
The TL431ILPRAG offers better temperature stability and a wider range of programmable output voltages compared to traditional zener diodes.
- What is the reference input voltage tolerance of the TL431ILPRAG?
The reference input voltage tolerance is ±0.4% (Typ @ 25°C for TL431B grade).
- Can the TL431ILPRAG be used as a negative voltage reference?
- What is the off-state cathode current of the TL431ILPRAG?
The off-state cathode current is between 20 nA and 1000 nA.
