Overview
The NCP431AVLPRAG is a three-terminal programmable shunt regulator diode produced by onsemi. It is designed as a direct upgrade to the industry standard TL431A and operates as a low temperature coefficient zener. This device can be programmed to output voltages from the reference voltage (Vref) up to 36 V using two external resistors. The NCP431AVLPRAG is characterized by its wide operating current range of 40 µA to 100 mA and a typical dynamic impedance of 0.22 Ω. Its low minimum operating current makes it ideal for secondary regulators in SMPS adapters with extremely low no-load consumption. The 2.5 V reference voltage is convenient for obtaining a stable reference from 5.0 V logic supplies, and it can be used as either a positive or negative voltage reference due to its shunt regulator operation.
Key Specifications
| Characteristic | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Input Voltage (Vref) | V | 2.475 | 2.500 | 2.525 |
| Reference Input Voltage Deviation Over Temperature Range | mV | - | - | 15 |
| Operating Current Range | mA | 0.04 | - | 100 |
| Dynamic Impedance (ZKA) | Ω | - | 0.22 | - |
| Temperature Range | °C | -40 | - | 125 |
| Package Type | - | - | TO-92 (TO-226) | - |
| Tolerance | % | - | 1 | - |
Key Features
- Programmable output voltage up to 36 V using two external resistors.
- Low minimum operating current of 40 µA, making it suitable for low no-load consumption applications.
- Wide operating current range of 40 µA to 100 mA.
- Low dynamic impedance of 0.22 Ω typical.
- Temperature compensated for operation over the full rated operating temperature range.
- Equivalent full-range temperature coefficient of 50 ppm/°C typical.
- Pin compatible with TL431A and TL432 for the NCP431 and NCP432 respectively.
Applications
- Switchmode Power Supplies.
- Instrumentation.
- Adapters.
- Flat TVs.
- Digital Voltmeters.
- Op Amp Circuitry.
Q & A
- What is the NCP431AVLPRAG used for?
The NCP431AVLPRAG is used as a programmable shunt regulator diode, suitable for applications requiring a stable voltage reference, such as in switchmode power supplies, instrumentation, and op amp circuitry.
- What is the operating current range of the NCP431AVLPRAG?
The operating current range of the NCP431AVLPRAG is from 40 µA to 100 mA.
- What is the typical dynamic impedance of the NCP431AVLPRAG?
The typical dynamic impedance of the NCP431AVLPRAG is 0.22 Ω.
- What is the temperature range for the NCP431AVLPRAG?
The NCP431AVLPRAG operates over a temperature range of -40°C to 125°C.
- Can the NCP431AVLPRAG be used as a positive or negative voltage reference?
Yes, the NCP431AVLPRAG can be used as either a positive or negative voltage reference due to its shunt regulator operation.
- What is the reference voltage tolerance of the NCP431AVLPRAG?
The reference voltage tolerance of the NCP431AVLPRAG is typically 1%).
- What package types are available for the NCP431AVLPRAG?
The NCP431AVLPRAG is available in the TO-92 (TO-226) package type).
- Is the NCP431AVLPRAG pin compatible with other devices?
Yes, the NCP431AVLPRAG is pin compatible with the TL431A and TL432).
- What are the key applications of the NCP431AVLPRAG?
The key applications include switchmode power supplies, instrumentation, adapters, flat TVs, digital voltmeters, and op amp circuitry).
- How is the output voltage of the NCP431AVLPRAG programmed?
The output voltage of the NCP431AVLPRAG can be programmed using two external resistors).
