Overview
The TL431BILPRA 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 the reference voltage (Vref) 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 particularly useful in applications requiring stable voltage references, such as digital voltmeters, power supplies, and op-amp circuitry.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Reference Input Voltage | Vref | V | 2.44 | 2.495 | 2.55 |
| Voltage Reference Tolerance | - | % | - | ±0.4 | - |
| Dynamic Output Impedance | |ZKA| | Ω | 0.22 | - | 0.5 |
| Sink Current Capability | IK | mA | 1.0 | - | 100 |
| Temperature Coefficient | - | ppm/°C | - | 50 | - |
| Cathode to Anode Voltage | VKA | V | - | - | 37 |
| Operating Junction Temperature | TJ | °C | - | - | 150 |
| Operating Ambient Temperature Range | TA | °C | -40 | - | 85 |
Key Features
- Programmable Output Voltage: The TL431BILPRA can be programmed from the reference voltage (Vref) to 36 V using two external resistors.
- Voltage Reference Tolerance: ±0.4% typical at 25°C for the TL431B series.
- Low Dynamic Output Impedance: 0.22 Ω typical, ensuring stable voltage regulation.
- Sink Current Capability: Operates over a wide current range of 1.0 mA to 100 mA.
- Temperature Compensated: Designed for operation over the full rated operating temperature range with an equivalent full-range temperature coefficient of 50 ppm/°C typical.
- Low Output Noise Voltage: Suitable for applications requiring low noise voltage references.
- Pb-Free Packages Available: Compliant with lead-free packaging requirements.
Applications
- Digital Voltmeters: Provides stable voltage references for accurate measurements.
- Power Supplies: Used in feedback control and as a voltage monitor in power supply circuits.
- Op-Amp Circuitry: Acts as a stable reference voltage in operational amplifier circuits.
- Constant Current Source/Sink: Can be configured to provide constant current in various applications.
- Series Pass Regulator: Functions as a series pass regulator in voltage regulation circuits.
Q & A
- What is the programmable output voltage range of the TL431BILPRA?
The TL431BILPRA can be programmed from the reference voltage (Vref) to 36 V using two external resistors.
- What is the typical voltage reference tolerance of the TL431B series at 25°C?
The typical voltage reference tolerance is ±0.4% at 25°C.
- What is the dynamic output impedance of the TL431BILPRA?
The dynamic output impedance is 0.22 Ω typical.
- What is the operating current range of the TL431BILPRA?
The device operates over a current range of 1.0 mA to 100 mA.
- What is the temperature coefficient of the TL431BILPRA?
The equivalent full-range temperature coefficient is 50 ppm/°C typical.
- What are the typical applications of the TL431BILPRA?
Common applications include digital voltmeters, power supplies, op-amp circuitry, constant current sources/sinks, and series pass regulators.
- What is the maximum cathode to anode voltage for the TL431BILPRA?
The maximum cathode to anode voltage is 37 V.
- What is the operating junction temperature range for the TL431BILPRA?
The operating junction temperature range is up to 150°C.
- Is the TL431BILPRA available in Pb-free packages?
- What is the typical operating ambient temperature range for the TL431BILPRA?
