NCP300LSN185T1G

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PMIC supervisors refer to integrated circuits that supervise power supplies, reset microprocessors and provide system protection. As an important component in the power system, the NCV300LSN185T1G supervisor provides a variety of functions and contributes significantly to system stability. The application field and working principle of the NCV300LSN185T1G supervisor are discussed in this article.

Application Field

NCV300LSN185T1G is a low operating supply supervision IC dedicated to microprocessor reset. The device is well suited for 5V systems and hence can be used for Intel Pentium Class, AMD K6/K7 and K6-2/3/4 platforms. It is also compatible with 3.3V and 2.5V systems too. In addition, it is commonly used in PC, embedded systems and in other portable and hand-held systems.

The NCV300LSN185T1G includes many key features such as Power On Reset, Manual Reset Input, Watchdog Timer Reset, Brown Out Detect, Power Supervision and Integrated Reset Generator with voltage transition monitoring etc. The on-chip Reset generator generates an active-low reset pulse with a fixed timeout period for system reset. In addition, it has power fail comparator for monitoring the adjustable VCC threshold. The Watchdog Timer has a programmable timeout for system reset. And the Brown Out Detect monitors the VCC voltage for a selectable system reset.

Working Principle

The general purpose of using the NCV300LSN185T1G supervisor is its ability to safely reset microprocessors as part of a power-on-reset. This device accomplishes this by monitoring the supply voltage, which is referred to as the VCC supply. The high voltage side of the voltage sensor is connected to the VCC supply and the low voltage side is connected to GND. The center tap is connected to the threshold terminal.

The voltage sensor is configured to provide a reset signal when the voltage on the VCC supply drops below the programmed threshold level. If a power failure occurs, the reset signal is generated, and the microprocessor can be reset to its initial state and restarted. When the power supply is restored, the microprocessor is restarted and the system resumes operation.

The NCV300LSN185T1G also features an integrated reset generator, which is used to generate system reset signals. The reset generator monitors the VCC voltage and generates an active low reset signal when the voltage drops below the preset threshold. The reset signal is active for a fixed timeout period, after which the microprocessor is reset and the system is restarted. Furthermore, the NCV300LSN185T1G includes Watchdog Timer and Brown Out Detect circuits, which can be used to guard against system lockups and sudden voltage drops.

The NCV300LSN185T1G also has an integrated manual reset input circuit, which can be used to trigger a system reset manually. The user can connect a switch to the manual reset input, which will generate a system reset signal and reset the microprocessor.

The NCV300LSN185T1G supervisor is an important component in power systems as it provides system reset, power supervision and protection features, which help ensure system stability and reliability. The device is well suited for use in PCs, embedded systems, handheld or portable devices and other applications which require supply power supervision.

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