NCV301LSN40T1

Power Management Integrated Circuit (PMIC) supervisors serve an essential role in keeping power features up and running both efficiently and effectively, from the power input to the end output. The NCV301LSN40T1 is one example of a PMIC supervisor, a microcontroller supervisor device that works alongside microcontrollers to help regulate the power functions of a circuit or the microcontroller itself.

This specific device from ON Semiconductor, enables low power consumption and is designed to be used in 8-bit microcontroller applications in the automotive environment. It provides an efficient voltage detection, reset and margin improvement function to the system, thanks to its voltage detection circuit and reset pin/open drain structure. Its main purpose is to monitor different input voltages of a system and generate an early warning before reaching harmful voltages.

Application Field

The NCV301LSN40T1 is an ideal integrated circuit for automotive power management applications, such as car radio systems and navigation systems. It ensures proper distribution of power into the system. It is perfect for applications where the supply voltage should not drop below a predetermined level, as it can generate an early warning before reaching such level.

Moreover, this IC is used for other non-automotive applications, such as in medical applications, security systems, telecommunications, and gaming. It can also be used in safety applications, such as airbag systems, as it provides a low-power consumption with high-accuracy voltage monitor and reset functions.

Working Principle

The NCV301LSN40T1 protects loads from over-voltage and under-voltage conditions by supplying reset signals to other components. It functions by comparing the supply voltage with a fixed voltage that is set through the external resistors. Whenever the system voltage drops below the set voltage, the device will reset the output pins and bring the system back to its safe working limits. The device can also detect high voltage levels, generating an early warning before reaching predetermined levels.

The NCV301LSN40T1 also regulates microcontroller power consumption levels, thanks to its built-in shutdown mode that can be triggered by low voltage detect (LVD). This feature cuts off the power to the microcontroller and other components when the power reaches a low voltage level. This helps conserve energy, reduce the heat generated by the system, and even extend the battery life of the system.

The device also eliminates the need for additional comparators, thanks to its programmable active-low reset delay and active-low signal reset timeout functions. By controlling reset delays and timings, it allows the output signal to remain asserted even after the input voltage is no longer valid, thus providing a more stable platform for the microcontroller. This helps create reliable system performance in all conditions.