Overview
The NCP303LSN18T1G is a voltage detector from Onsemi, part of the NCP303 series. This device is designed as a second-generation ultra-low current voltage detector with a programmable time delay generator. It is particularly suited for use as a reset controller in portable microprocessor-based systems where extended battery life is crucial. The NCP303LSN18T1G features an open-drain N-Channel output with an active low reset output, making it ideal for applications requiring precise voltage monitoring and reliable reset functionality.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Detector Threshold (Vin Decreasing) | VDET− | 0.882 | 0.900 | 0.918 | V |
| Maximum Operating Voltage (Pin 2) | Vin(max) | 10 | V | ||
| Minimum Operating Voltage (Pin 2) at TA = 25°C | Vin(min) | 0.55 | 0.65 | 0.70 | V |
| Quiescent Current | Iin | 0.23 | 0.48 | 1.3 | μA |
| Reset Output Current (Active Low) | IOUT | 0.01 | 1.0 | 2.0 | mA |
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | |
| Delay Capacitor Pin Threshold Voltage | VTCD | 0.99 | 1.34 | 1.68 | V |
| Delay Capacitor Pin Sink Current | ICD | 2.0 | 200 | 1600 | nA |
| Delay Pullup Resistance | RD | 0.5 | 1.0 | 2.0 | MΩ |
Key Features
- Ultra-low quiescent current of 0.5 μA typical, ensuring extended battery life in portable systems.
- Highly accurate undervoltage threshold with hysteresis to prevent erratic system reset operations.
- Externally programmable time delay generator to customize the reset timing according to system requirements.
- Wide operating voltage range from 0.8 V to 10 V, making it versatile for various applications.
- Open-drain N-Channel output with an active low reset output, suitable for microprocessor-based systems.
- Specified over the -40°C to +125°C temperature range, ensuring reliability across a broad temperature spectrum.
- ESD protection exceeding Human Body Model 2000 V and Machine Model 200 V tests.
Applications
- Portable microprocessor-based systems where low power consumption is critical.
- Battery-powered devices requiring precise voltage monitoring and reset functionality.
- Automotive and industrial applications where reliable voltage detection is essential.
- Embedded systems and IoT devices that need accurate and low-power voltage supervision.
Q & A
- What is the primary function of the NCP303LSN18T1G?
The NCP303LSN18T1G is a voltage detector designed to monitor the voltage level and generate a reset signal when the voltage falls below a specified threshold.
- What is the typical quiescent current of the NCP303LSN18T1G?
The typical quiescent current is 0.5 μA.
- What is the operating voltage range of the NCP303LSN18T1G?
The device operates over a voltage range from 0.8 V to 10 V.
- How is the time delay for the reset signal programmed?
The time delay is externally programmable using a capacitor connected to the delay pin.
- What type of output does the NCP303LSN18T1G have?
The device has an open-drain N-Channel output with an active low reset output.
- What is the temperature range over which the NCP303LSN18T1G is specified?
The device is specified over the -40°C to +125°C temperature range.
- Does the NCP303LSN18T1G have ESD protection?
Yes, it exceeds Human Body Model 2000 V and Machine Model 200 V tests.
- What are some common applications for the NCP303LSN18T1G?
Common applications include portable microprocessor-based systems, battery-powered devices, automotive, and industrial applications.
- How does the NCP303LSN18T1G prevent erratic system reset operations?
The device features a highly accurate undervoltage threshold with hysteresis to prevent erratic system reset operations.
- What is the maximum junction temperature for the NCP303LSN18T1G?
The maximum junction temperature is +150°C.
