NCP803SN438T1G Integrated Circuits (ICs)

PMIC, also known as Power Management IC, is a popular integrated device used in power management and control solutions. There are various types of Power Management ICs which may include voltage supervisors, voltage regulators, current limiting, charge pumps and I/O expanders. The NCP803SN438T1G is one such Power Management ICs belonging to the voltage supervisors category. This article explains the application field and working principle of NCP803SN438T1G.

Introduction

NCP803SN438T1G is an 8-pin voltage supervisor IC. It is specifically designed to monitor the power supply voltage of systems either with a VCC supervisor, or a micropower supervisor. It offers an adjustable input-voltage threshold to protect against an undesirable leakage current that may harm the operation of the system. The supervisor can be powered up from a 3-terminal regulator or directly from the system power supply.

Application field and working principle

The main application field of NCP803SN438T1G is in systems with power supply voltages that are subject to small fluctuations. Hence, it is widely used in embedded systems, data storage and processing systems, and communication systems. Additionally, the IC can be used in automotive and motor control applications that demand high performance spurious electrical stability.

The NCP803SN438T1G works by continuously monitoring the voltage level at its input. If the voltage passes a certain threshold, the supervisor IC generates a reset signal which in turn either resets or issues an appropriate protection signal. If a low-voltage trip is detected, the supervisor can indicate a brown-out condition. The adjustable input-voltage threshold lets users select the desired voltage level for their system.

The NCP803SN438T1G further provides a power-on reset (POR) output. This POR output ensures that all system components have been initialized and set properly at power-on, even if the system power supply is faulty. The POR output is active only after the system supply voltage has reached the trip point and has remained above it for 200ms.

Additionally, the NCP803SN438T1G offers a reset output option on its open-drain output. This reset output is asserted while the threshold voltage is below the set trip point and returns to a logic high when the voltage returns above the trip point. This reset output is ideal for extended battery life in applications that require immediate shutdown of non-critical components in the event of under voltage conditions.

In order to ensure long term operation in automotive automotive and industrial applications, the NCP803SN438T1G is designed to withstand ESD up to 2000V, and its overvoltage tolerance is up to 28V. This makes NCP803SN438T1G the ideal voltage supervisor for achieving higher reliability in hostile environments.

Conclusion

NCP803SN438T1G is an 8-pin voltage supervisor IC. It is widely used in various systems including embedded systems, data storage and processing systems, and communication systems. This IC provides an adjustable input-voltage threshold that allows users to set the desired voltage level for their system. It also features a power-on reset and reset output options which add to its reliability. Finally, its ESD tolerance making it ideal for applications in automotive and industrial environments.