NCP301LSN32T1G

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The NCP301LSN32T1G is a feature-packed, single-channel supervisor with reset output generator and power-on-reset (POR) undervoltage lockout(UVLO) protection circuit. It belongs to the class of power management ICs (PMICs) called supervisors. It is often used to identify unsafe operating conditions that could lead to system malfunction or damage.

Features

The NCP301LSN32T1G is a tiny package (SOT-23-5), but it is designed to exceed the current industry standards. It has a variety of features designed to ensure optimal power safety and reliability. Some of its prominent features include:

• Low voltage detection (LVD) and reset threshold range from 1.5V to 4v with 0.258V resolution
• Integrated output for generating a manual reset (MR) signal
• Integrated reset (RES) output delay time programmable up to 100mS
• Reset output polarity selectable (Push-pull or open drain)
• Latch-up protection exceeds 100mA per JESD78 Class II Level
• Dynamic power saving mode reduces power consumption

Application

The NCP301LSN32T1G can be used in a wide range of applications, such as clocks, motor control, automotive, industrial and consumer applications, and especially in battery-powered portable devices. It is used as an independent safety supervisor to protect the system from malfunction and damage.

In addition to its primary function of powering and resetting, it can also be used to implement other important functions and provide accurate system control such as clock frequency monitoring, low-power and low-voltage system management, supply voltage monitoring, and over-voltage and over-current system protection.

Working principle

The NCP301LSN32T1G works by monitoring the system voltage and emitting a reset signal when the input voltage drops below the minimum specified threshold. The reset signal can either be active high or active low, depending on the chosen configuration. The integrated reset output delay time is programmable up to 100mS, allowing the user to set the reset response time as needed.

When a power-on reset (POR) event is detected, the NCP301LSN32T1G offers both manual and automatic resetting options. The manual resetting allows the user to define, through external push-button, when a reset needs to be initiated and the automatic resetting happens immediately when the input voltage drops below the specified level.

In addition, the device also features a wide range of protection features, such as Latch-up protection, which detects current flow in the wrong direction, or when the input exceeds the specified level, and thermal protection, which can detect overheating of the power supply components.

Conclusion

The NCP301LSN32T1G is a highly versatile power management IC (PMIC) used in a wide range of applications. As a supervisor, the device offers superior protection to ensure the safety and reliability of the system, while providing easy and robust reset and power-on reset capabilities. In addition, its wide range of protection features, such as Latch-up and Thermal protection, ensures that the system remains protected against potential damage.

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