Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	2.5V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Supplier Device Package:	5-TSOP
Base Part Number:	NCP303

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NCP303LSN25T1 Application Field and Working Principle

Introduction

NCP303LSN25T1 is a power management integrated circuit (PMIC) manufactured by ON Semiconductor. It belongs to the family of Power Supply Supervisors, a type of PMIC designed for monitoring the power supply conditions and protecting the system from high current faults. Power Supply Supervisors can detect abnormally high current levels, prevent excessive voltage drops and provide protections against short circuits as well as system resets.In this article, we will discuss the application field and regulation methodology of the NCP303LSN25T1 power supply supervisor, outlining its key features, benefits, and specifications.

Application Fields and Features

NCP303LSN25T1 Power Supply Supervisor is designed for battery-operated systems. It features an integrated charge pump voltage inverter for monitoring battery voltage and power supply conditions during operation and provides system protection against overvoltage and overcurrent conditions. The NCP303LSN25T1 also features an integrated continuous reset monitoring circuit, which is used to detect faults that cause excessive voltage or current in the system and provide system reset protections. In addition, NCP303LSN25T1 features a logic-level reset output, which can be used to reset external systems, thereby avoiding further damage caused by faults.Another key feature of the NCP303LSN25T1 is its low-power operation. The Power Supply Supervisor is extremely energy efficient, consuming less than 8 μW of power when in idle mode. This makes the NCP303LSN25T1 an ideal choice for battery-operated applications.

Working Principle

The NCP303LSN25T1 power supervisor works by monitoring the input voltage and current and comparing them to the desired system parameters. When it determines that the current or voltage are outside the specified range, the supervisor trips and the RESET output will be activated.The NCP303LSN25T1 also has a low-power monitor that constantly monitors the input voltage and current and triggers a power-on reset (POR) when the voltage or current goes out of range. This ensures that the system remains in a safe and stable state after a power loss.

Benefits and Specifications

The NCP303LSN25T1 Power Supply Supervisor offers a range of benefits for power supply monitoring applications. First and foremost, it is designed to be extremely energy efficient, consuming less than 8 μW on idle mode. This makes it an ideal choice for battery-operated applications, as it will not draw significant amounts of power. Another advantage of the NCP303LSN25T1 is its wide input voltage range. It can monitor inputs ranging from 3 V up to 26 V, making it suitable for use in a variety of applications. Its wide input voltage range also means that it can be used to monitor systems that require higher input voltages.The NCP303LSN25T1 also offers a variety of protections, including overvoltage, undervoltage and overcurrent protections. In addition, it has a low-power monitor for resetting external systems in the event of a power failure. The supervisor also has a lockout feature and is designed to operate from -40 °C to +85 °C.

Conclusion

In conclusion, the NCP303LSN25T1 Power Supply Supervisor from ON Semiconductor is a highly efficient PMIC designed for applications requiring power supply regulation, as well as bidirectional power supply monitoring capabilities. It features a wide input voltage range and offers reliable protection against overvoltage, undervoltage, and overcurrent conditions. It also has a low-power monitor and performs reset functions when required. Its energy efficiency and wide operating temperature range make it an ideal choice for battery-operated applications. With its versatility and reliability, the NCP303LSN25T1 can be used in a wide range of applications.

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