NCV303LSN49T1

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The NCV303LSN49T1 is a highly-integrated power management IC (PMIC) solution specifically designed to improve the efficiency, system performance, and overall power reliability of a wide range of applications, primarily aimed at the industrial, medical, and consumer markets. It belongs to the family of Supervisors PMICs and is primarily used to provide a high-accuracy and low-power reset circuitry.

Features

The NCV303LSN49T1 is equipped with several features that make it ideal for a number of applications. It offers a wide input voltage range of 1.62V to 5.5V and can operate at up to 125 degrees Celsius. It features a low quiescent current of 0.9µA (@3.3V) and a low leakage current of 3nA max. It integrates reset, watchdog timer, and supply monitor functions, allows for a flexible master-slave configurable architecture, and has an adjustable reset threshold voltage of 1.2V to 2.4V. The NCV303LSN49T1 is available in a VSSOP-5 package and is compliant to RoHS and halogen-free standards.

Application fields

The NCV303LSN49T1 is primarily used as a power supervisor in a variety of industries and applications. Its reset, watchdog timer, and supply monitor functions make it ideal for medical equipment, consumer electronics, instrumentation, communication systems, industrial automation, and automotive applications. It can also be used in multiprocessor, microcontroller, and mixed-signal systems, especially where a low-power, high-accuracy reset circuitry is needed.

Working principle

The NCV303LSN49T1 implements a two-stage reset circuit to protect and monitor a power supply from faults, feed glitches, and other out-of-control conditions. It consists of a master latch, a comparator, and a slave latch. The master latch is triggered by a low power-on reset (POR) pulse when power is first applied. The comparator then monitors the supply voltage and compares it to a pre-determined threshold. When the supply voltage drops below the reset threshold, the slave latch is triggered and the reset signal is asserted. The reset signal stays active until the power supply has stabilized, at which point the master latch is reset. The NCV303LSN49T1 can be configured to assert the reset signal either when the supply voltage drops below the reset threshold or when it rises above the current threshold.

Conclusion

The NCV303LSN49T1 is an efficient and reliable PMIC Supervisor solution designed for a variety of applications. It features a wide input voltage range, low quiescent current, and low leakage current, as well as adjustable reset, watchdog timer, and supply monitor functions. The NCV303LSN49T1 is particularly useful when a low-power, high-accuracy reset circuitry is needed and is ideal for use in medical and consumer electronics, instrumentation, communication systems, industrial automation, and automotive applications.

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