Overview
The NCP303LSN28T1G is a part of the NCP303 series, which are second-generation ultra-low current voltage detectors produced by onsemi. These devices are designed for use as reset controllers in portable microprocessor-based systems, where extended battery life is crucial. The NCP303 series features highly accurate undervoltage detection with hysteresis and an externally programmable time delay generator, preventing erratic system reset operations.
Key Specifications
| Characteristic | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Detector Threshold (VDET−) | V | 2.744 | 2.8 | 2.856 |
| Detector Threshold Hysteresis (VHYS) | V | 0.084 | 0.140 | 0.196 |
| Supply Current (Iin) | μA | 0.25 | 0.50 | 1.0 |
| Minimum Operating Voltage (Vin(min)) | V | 0.70 | - | - |
| Maximum Operating Voltage (Vin(max)) | V | - | - | 10 |
| Reset Output Current (IOUT) - Active Low | mA | 0.01 | 1.0 | 2.0 |
| Operating Ambient Temperature Range | °C | -40 | - | 125 |
| Delay Capacitor Pin Threshold Voltage (VTCD) | V | 1.49 | 2.01 | 2.53 |
| Delay Pullup Resistance (RD) | MΩ | 0.5 | 1.0 | 2.0 |
Key Features
- Ultra-low quiescent current of 0.5 μA typical.
- High accuracy undervoltage threshold with 2.0% tolerance.
- Externally programmable time delay generator.
- Wide operating voltage range from 0.8 V to 10 V.
- Open drain N-Channel output with active low reset.
- Specified over the -40°C to +125°C temperature range.
- Complementary output configuration available in other models of the series.
Applications
The NCP303LSN28T1G is ideal for use in portable microprocessor-based systems, such as handheld devices, smartphones, and other battery-powered equipment where low power consumption and reliable reset functionality are essential. It is also suitable for automotive and industrial applications requiring robust voltage monitoring and reset control.
Q & A
- What is the primary function of the NCP303LSN28T1G?
The primary function is to act as a reset controller with undervoltage detection and an externally programmable time delay generator in microprocessor-based systems.
- What is the typical quiescent current of the NCP303LSN28T1G?
The typical quiescent current is 0.5 μA.
- What is the operating voltage range of the NCP303LSN28T1G?
The operating voltage range is from 0.8 V to 10 V.
- What type of output does the NCP303LSN28T1G have?
The NCP303LSN28T1G has an open drain N-Channel output with an active low reset.
- How is the time delay programmed in the NCP303LSN28T1G?
The time delay is externally programmable using a capacitor connected to the delay pin.
- What is the detector threshold hysteresis of the NCP303LSN28T1G?
The detector threshold hysteresis (VHYS) ranges from 0.084 V to 0.196 V.
- What is the maximum operating temperature of the NCP303LSN28T1G?
The maximum operating temperature is +125°C.
- Can the NCP303LSN28T1G be used in automotive applications?
- What is the minimum operating voltage of the NCP303LSN28T1G?
The minimum operating voltage is 0.70 V.
- How does the NCP303LSN28T1G prevent erratic system reset operations?
