Overview
The NCP303LSN38T1G is a second-generation ultra-low current voltage detector from onsemi, designed for use as a reset controller in portable microprocessor-based systems where extended battery life is crucial. This device features a highly accurate undervoltage detector with hysteresis and an externally programmable time delay generator, preventing erratic system reset operations.
The NCP303 series includes an open-drain N-Channel output with an active low reset output, making it versatile for various applications. It operates over a wide voltage range and is specified over a temperature range of -40°C to +125°C, ensuring reliability in diverse environments.
Key Specifications
| Characteristic | Unit | Min | Max | |
|---|---|---|---|---|
| Input Power Supply Voltage (Pin 2) | V | 0.8 | - | 10 |
| Detector Threshold (Pin 2, Vin Decreasing) | V | 3.696 | 3.8 | 3.904 |
| Detector Threshold Hysteresis (Pin 2, Vin Increasing) | V | 0.108 | 0.180 | 0.252 |
| Quiescent Current | µA | 0.25 | 0.5 | 1.3 |
| Reset Output Current (Pin 1, Active Low) | mA | 0.01 | 1.0 | 2.0 |
| Delay Capacitor Pin Voltage (Pin 5) | V | -0.3 | - | Vin + 0.3 |
| Delay Capacitor Pin Sink Current (Pin 5) | µA | 2.0 | 200 | 3600 |
| Operating Ambient Temperature Range | °C | -40 | - | 125 |
Key Features
- Ultra-low quiescent current of 0.5 µA typical, ensuring extended battery life in portable systems.
- High accuracy undervoltage threshold with hysteresis to prevent erratic system reset operations.
- Externally programmable time delay generator using an external capacitor.
- Wide operating voltage range of 0.8 V to 10 V.
- Open-drain N-Channel output with active low reset output.
- Specified over the -40°C to +125°C temperature range.
- Complementary output configuration available in other models of the series.
Applications
- Portable microprocessor-based systems where battery life is critical.
- Reset controllers in embedded systems.
- Power management in handheld devices and mobile electronics.
- Automotive and industrial applications requiring robust voltage monitoring.
Q & A
- What is the primary function of the NCP303LSN38T1G?
The primary function is to act as a reset controller with an undervoltage detector and programmable time delay in microprocessor-based systems.
- What is the typical quiescent current of the NCP303LSN38T1G?
The typical quiescent current is 0.5 µA.
- What is the operating voltage range of the NCP303LSN38T1G?
The operating voltage range is from 0.8 V to 10 V.
- How is the time delay programmed in the NCP303LSN38T1G?
The time delay is programmed using an external capacitor connected to the delay capacitor pin.
- What type of output does the NCP303LSN38T1G have?
The NCP303LSN38T1G has an open-drain N-Channel output with an active low reset output.
- What is the temperature range over which the NCP303LSN38T1G is specified?
The device is specified over the -40°C to +125°C temperature range.
- What is the detector threshold hysteresis for the NCP303LSN38T1G?
The detector threshold hysteresis is between 0.108 V and 0.252 V.
- Can the NCP303LSN38T1G be used in automotive applications?
- How does the NCP303LSN38T1G ensure reliable system reset operations?
- What is the maximum operating voltage for the input power supply of the NCP303LSN38T1G?
