NCV303LSN09T1G

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The NCV303LSN09T1G is part of a large family of Microchip supervisor components, collectively known as PMIC (Power Management Integrated Circuit) supervisors. This includes a range of products specifically designed to provide verification, control and coordination of a variety of functions within an IC. This includes the ability to detect over-or under-current conditions, reset time delays and other similar functions. The NCV303LSN09T1G is one such device and in this article, we take a look at its main application field and outline its working principle.

The NCV303LSN09T1G PMIC supervisor is designed to ensure maximum reliability in a system where over-current and over-voltage protection circuits are required. The device can protect up to three independent power supplies and provide protection against over-voltage, under-voltage and over-current scenarios. The device is also equipped with a power-good (PG) signal to reliably signal that each power source is operating within the expected range. The device can also provide a reset signal based on time-delay or voltage conditions.

This device is used in a wide range of applications including computer, office equipment, industrial control systems and automotive power management. The device is available in a range of packages and is suitable for surface mounting. It is compliant to the RoHS standard and can operate over a temperature range of -40°C to 85°C.

When it comes to the working principle, the device can be powered by either 3.5V or 1.8V. The PG (power-good) output is asserted during start-up or a power line reset sequence. This input will then be checked for system power supply parameters to ensure that the power supply is operating within the accepted range. The built-in over-current protection is enabled by two main signals; the VSENSE signal and the ISENSE signal. The ISENSE signal is used to detect the current in a power supply and the VSENSE signal is used to detect the voltage. The device then compares the two signals and if the voltage exceeds the programmed limit, it will issue a reset signal.

The NCV303LSN09T1G provides a variety of additional protection functions including short-circuit protection, input under-voltage protection, output short circuit protection, and over-current protection. The device also includes a programmable timer that can be used to delay the reset signal. The device also has a built-in RC oscillator to provide clock signals for the device. The device can be configured to assert the reset signal when the timer has expired or an over-current or over-voltage scenario is detected.

In conclusion, the NCV303LSN09T1G is a useful PMIC supervisor device, offering reliable over-current, under-voltage and over-voltage protection for a variety of systems. The device is designed for surface mounting and is RoHS certified. The device is available in a range of packages and can operate over a temperature range of -40°C to 85°C. The device also offers a power-good signal and a programmable timer for reset delay times. It is a useful device for protecting a system against over-voltage and over-current scenarios.

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