Overview
The TL431AILPRM, produced by onsemi, is a three-terminal programmable shunt regulator diode. This monolithic IC voltage reference operates as a low temperature coefficient zener that can be programmed from 2.5 V to 36 V using two external resistors. It is designed to offer a wide operating current range of 1.0 mA to 100 mA and features a typical dynamic impedance of 0.22 Ω. The device is temperature compensated for operation over its full rated operating temperature range, ensuring stability and reliability in various applications.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Cathode to Anode Voltage | VKA | - | - | 37 | V |
| Cathode Current Range, Continuous | IK | -100 | - | 150 | mA |
| Reference Input Voltage | VREF | 2.44 | 2.495 | 2.55 | V |
| Dynamic Output Impedance | |ZKA| | - | 0.22 | 0.5 | Ω |
| Operating Junction Temperature | TJ | - | - | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 85 | °C |
| Storage Temperature Range | TSTG | -65 | - | 150 | °C |
Key Features
- Programmable Output Voltage to 36 V
- Voltage Reference Tolerance: ±0.4% Typ @ 25°C (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 Packages are Available
Applications
The TL431AILPRM is versatile and can be used in various applications, including:
- Digital voltmeters
- Power supplies
- Op amp circuitry
- Feedback control for driving an optocoupler in power supplies
- Voltage monitor
- Constant current source
- Constant current sink
- Series pass regulator
Q & A
- What is the programmable output voltage range of the TL431AILPRM?
The TL431AILPRM can be programmed to output voltages from 2.5 V to 36 V using two external resistors.
- What is the typical dynamic output impedance of the TL431AILPRM?
The typical dynamic output impedance is 0.22 Ω.
- What is the operating current range of the TL431AILPRM?
The operating current range is from 1.0 mA to 100 mA.
- What is the temperature coefficient of the TL431AILPRM?
The equivalent full-range temperature coefficient is 50 ppm/°C typical.
- What is the maximum operating junction temperature of the TL431AILPRM?
The maximum operating junction temperature is 150 °C.
- What is the storage temperature range for the TL431AILPRM?
The storage temperature range is from -65 °C to 150 °C.
- Can the TL431AILPRM be used as a positive or negative voltage reference?
Yes, the TL431AILPRM can be used as either a positive or negative voltage reference since it operates as a shunt regulator.
- What are some common applications of the TL431AILPRM?
Common applications include digital voltmeters, power supplies, op amp circuitry, and feedback control in power supplies.
- Is the TL431AILPRM Pb-free?
- What is the reference input voltage of the TL431AILPRM?
The reference input voltage (VREF) is approximately 2.495 V.
