Overview
The NCP431ACLPRAG is a three-terminal programmable shunt regulator diode manufactured by ON Semiconductor. It is a direct upgrade to the industry standard TL431A and operates as a low temperature coefficient zener. This device is programmable from the reference voltage (Vref) to 36 V using two external resistors. The NCP431ACLPRAG is known for its low minimum operating current, making it an ideal choice for secondary regulators in Switch-Mode Power Supplies (SMPS) adapters with extremely low no-load consumption.
Key Specifications
| Characteristic | Unit | Typical Value | Minimum Value | Maximum Value |
|---|---|---|---|---|
| Reference Input Voltage (Vref) | V | 2.5 | 2.475 | 2.525 |
| Operating Current Range | mA | 0.04 to 100 | 0.04 | 100 |
| Dynamic Output Impedance (ZKA) | Ω | 0.22 | - | 0.5 |
| Temperature Coefficient | ppm/°C | 50 | - | - |
| Operating Temperature Range | °C | -40 to 85 | -40 | 85 |
| Programmable Output Voltage | V | - | Vref | 36 |
| Voltage Reference Tolerance | % | 1 | - | - |
Key Features
- Low Minimum Operating Current: 40 µA, typical at 25°C, making it ideal for low-power applications.
- Programmable Output Voltage: Can be programmed from Vref to 36 V using two external resistors.
- Low Dynamic Output Impedance: 0.22 Ω typical, ensuring stable voltage regulation.
- Temperature Compensated: Operates over the full rated operating temperature range with a temperature coefficient of 50 ppm/°C typical.
- Wide Operating Current Range: From 40 µA to 100 mA.
- Pb-Free and AEC-Q100 Qualified: Suitable for automotive and other applications requiring unique site and control change requirements.
Applications
- Switch-Mode Power Supplies (SMPS): Ideal for secondary regulators with extremely low no-load consumption.
- Instrumentation: Used in digital voltmeters and other precision measurement devices.
- Power Supplies: Provides stable voltage references for various power supply designs.
- Op Amp Circuitry: Used as a stable voltage reference in operational amplifier circuits.
- Voltage Adapters and Chargers: Suitable for voltage regulation in adapters and chargers.
Q & A
- What is the typical operating current of the NCP431ACLPRAG?
The typical minimum operating current is 40 µA at 25°C.
- What is the programmable output voltage range of the NCP431ACLPRAG?
The output voltage can be programmed from Vref (2.5 V) to 36 V using two external resistors.
- What is the dynamic output impedance of the NCP431ACLPRAG?
The typical dynamic output impedance is 0.22 Ω.
- What is the temperature coefficient of the NCP431ACLPRAG?
The temperature coefficient is 50 ppm/°C typical.
- What are the common applications of the NCP431ACLPRAG?
Common applications include switch-mode power supplies, instrumentation, power supplies, op amp circuitry, and voltage adapters and chargers.
- Is the NCP431ACLPRAG Pb-free and AEC-Q100 qualified?
- What is the operating temperature range of the NCP431ACLPRAG?
The operating temperature range is from -40°C to 85°C.
- Can the NCP431ACLPRAG be used as a positive or negative voltage reference?
- What is the voltage reference tolerance of the NCP431ACLPRAG?
The voltage reference tolerance is ±1% typical at 25°C.
- What package types are available for the NCP431ACLPRAG?
The NCP431ACLPRAG is available in TO-92 packages among others.
