Overview
The NCP302LSN30T1G is a second-generation ultra-low current voltage detector from onsemi, designed for use as a reset controller in portable microprocessor-based systems. This device is part of the NCP302 series, which features highly accurate undervoltage detection with hysteresis and an externally programmable time delay generator. This combination prevents erratic system reset operations, making it ideal for applications where extended battery life is crucial.
Key Specifications
| Characteristic | Unit | Min | Max | |
|---|---|---|---|---|
| Input Power Supply Voltage (Pin 2) | V | 0.8 | - | 10 |
| Detector Threshold (Pin 2, Vin Decreasing) | V | 2.94 | 3.0 | 3.06 |
| Detector Threshold Hysteresis (Pin 2, Vin Increasing) | V | 0.09 | 0.15 | 0.21 |
| Quiescent Current | μA | - | 0.5 | - |
| Reset Output Current (Pin 1, Active Low) | mA | - | - | 70 |
| Operating Ambient Temperature Range | °C | -40 | - | 125 |
| Delay Capacitor Pin Voltage (Pin 5) | V | -0.3 | - | Vin + 0.3 |
| Delay Capacitor Pin Sink Current (Pin 5) | μA | - | - | 3600 |
| Delay Pullup Resistance (Pin 5) | MΩ | 0.5 | 1.0 | 2.0 |
Key Features
- Highly accurate undervoltage detector with hysteresis.
- Externally programmable time delay generator.
- Ultra-low quiescent current of 0.5 μA typical.
- Complementary output configuration (active high or active low reset).
- Open drain N-Channel output option (NCP303 series).
- Wide operating voltage range of 0.8 V to 10 V.
- Specified over the -40°C to +125°C temperature range.
Applications
The NCP302LSN30T1G is specifically designed for use in portable microprocessor-based systems where extended battery life is paramount. It is suitable for a variety of applications, including:
- Reset controllers in handheld devices.
- Battery-powered systems requiring low power consumption.
- Automotive and industrial systems needing reliable voltage monitoring.
- Embedded systems and IoT devices.
Q & A
- What is the primary function of the NCP302LSN30T1G? The primary function is to act as a reset controller with undervoltage detection and a programmable time delay generator.
- What is the typical quiescent current of the NCP302LSN30T1G? The typical quiescent current is 0.5 μA.
- What is the operating voltage range of the NCP302LSN30T1G? The operating voltage range is from 0.8 V to 10 V.
- What types of output configurations are available for the NCP302 series? The NCP302 series offers complementary output configurations (active high or active low reset) and an open drain N-Channel output option (NCP303 series).
- How does the programmable time delay generator work? The time delay is programmable via an external capacitor connected to the delay pin, allowing for customizable delay times.
- What is the temperature range for the NCP302LSN30T1G? The device is specified over the -40°C to +125°C temperature range.
- What is the maximum reset output current for the NCP302LSN30T1G? The maximum reset output current is 70 mA.
- Can the NCP302LSN30T1G be used in automotive applications? Yes, it can be used in automotive and other applications requiring unique site and control change requirements.
- How does the undervoltage detection with hysteresis work? The device detects undervoltage with a specified threshold and hysteresis to prevent erratic system reset operations.
- What is the purpose of the delay pullup resistance? The delay pullup resistance helps in stabilizing the delay capacitor pin voltage.
- Is the NCP302LSN30T1G suitable for IoT devices? Yes, it is suitable for IoT devices due to its low power consumption and reliable voltage monitoring capabilities.
