Overview
The NCP431ACSNT1G is a three-terminal programmable shunt regulator diode produced by onsemi. 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 NCP431ACSNT1G is known for its low minimum operating current, making it ideal for secondary regulators in SMPS adapters with extremely low no-load consumption.
Key Specifications
| Characteristic | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Input Voltage (Vref) | V | 2.475 | 2.5 | 2.525 |
| Reference Input Voltage Deviation Over Temperature Range | mV | - | - | 10 |
| Minimum Operating Current | µA | - | 40 | - |
| Operating Current Range | mA | 0.04 | - | 100 |
| Dynamic Output Impedance | Ω | - | 0.22 | - |
| Temperature Coefficient | ppm/°C | - | 50 | - |
| Operating Temperature Range | °C | 0 | - | 70 |
| Package Type | - | - | SOT-23-3 (Pb-Free) | - |
Key Features
- Programmable Output Voltage to 36 V using two external resistors.
- Low Minimum Operating Current: 40 µA, Typ @ 25°C.
- Voltage Reference Tolerance: ±1%, Typ @ 25°C.
- Low Dynamic Output Impedance: 0.22 Ω, Typical.
- Sink Current Capability of 40 µA to 100 mA.
- Temperature Compensated for Operation over Full Rated Operating Temperature Range.
- Equivalent Full-Range Temperature Coefficient of 50 ppm/°C, Typical.
- AEC-Q100 Qualified and PPAP Capable for automotive and other applications requiring unique site and control change requirements.
Applications
- Voltage Adapters
- Switching Power Supply
- Precision Voltage Reference
- Chargers
- Instrumentation
- Digital Voltmeters
- Op Amp Circuitry
- Flat TVs
Q & A
- What is the NCP431ACSNT1G?
The NCP431ACSNT1G is a three-terminal programmable shunt regulator diode produced by onsemi.
- What is the reference input voltage of the NCP431ACSNT1G?
The reference input voltage (Vref) is 2.5 V with a tolerance of ±1% at 25°C.
- What is the minimum operating current of the NCP431ACSNT1G?
The minimum operating current is 40 µA, typical at 25°C.
- What is the dynamic output impedance of the NCP431ACSNT1G?
The dynamic output impedance is 0.22 Ω, typical.
- What is the operating temperature range of the NCP431ACSNT1G?
The operating temperature range is from 0°C to 70°C.
- What package type is the NCP431ACSNT1G available in?
The NCP431ACSNT1G is available in the SOT-23-3 (Pb-Free) package.
- Is the NCP431ACSNT1G suitable for automotive applications?
Yes, it is AEC-Q100 Qualified and PPAP Capable, making it suitable for automotive and other applications requiring unique site and control change requirements.
- What are some common applications of the NCP431ACSNT1G?
Common applications include voltage adapters, switching power supplies, precision voltage references, chargers, instrumentation, digital voltmeters, op amp circuitry, and flat TVs.
- How is the output voltage of the NCP431ACSNT1G programmed?
The output voltage can be programmed to up to 36 V using two external resistors.
- What is the temperature coefficient of the NCP431ACSNT1G?
The equivalent full-range temperature coefficient is 50 ppm/°C, typical.
