NCP305LSQ28T1G

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PMIC (Power Management Integrated Circuits) are used to manage the power supply of an electronic system, providing power efficiency and reliability. PMICs are used in a wide variety of applications, such as motor control, industrial automation, digital TVs and automotive electronics. Supervisors are a specific type of PMIC which provide voltage monitoring, resettable fault protection, and sequencing functions. The NCP305LSQ28T1G is an example of such a device, and in this article we will look at its application field and working principle.

The NCP305LSQ28T1G is a user-programmable supervisor with dual-channel monitoring capabilities. It is used in applications which require precise voltage monitoring in order to ensure reliability and contribute to power efficiency. It is suitable for a variety of system architectures, including AC-DC, DC-DC and buck regulator designs. The device is based on an 8-pin QFN package, making it compact and suitable for a range of industrial, automotive and consumer applications.

The NCP305LSQ28T1G offers a range of features which are designed to meet the demands of specific application scenarios. It is capable of monitoring two voltages, which can be set either manually or through I2C communications. For high accuracy and noise immunity, the device uses its own LDO regulator to provide a regulated supply which is independent of the system supply. It also features integrated reset and supervisor functions which can detect over-voltage and under-voltage conditions, providing electrical protection and reset capabilities.

In terms of its operation, the NCP305LSQ28T1G compares the two input voltages against their specified thresholds in order to determine their status. This is performed via the two on-chip comparators. The device then sends an active-low signal (such as a RSTb or VOKb) if the voltage level falls within their specified thresholds. If a voltage is outside of the specified threshold, the device will not send a signal and the output levels of the status pins remain high.

The reset/supervisor timer integrated on-chip also allows for advanced system protection. This is achieved by monitoring the status of the input voltages and taking action if necessary. The timer can be adjusted so that it launches a reset when the voltage levels exceed the specified thresholds. This is useful for applications that require reliable system protection in the event of power noise, brownouts, and other power anomalies.

The NCP305LSQ28T1G is a powerful and reliable supervisor IC, designed to provide precise voltage monitoring, reset and supervision functions. It is suitable for a range of applications, including AC-DC and DC-DC power supplies, motor control and digital TVs, as well as automotive, industrial and consumer electronics. It is also compact, using an 8-pin QFN package for easy integration into space constrained designs.

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