LM8365BALMFX45/NOPB Integrated Circuits (ICs)

Power Management ICs (PMICs) are increasingly becoming essential components in various electronic systems. One of the essential categories of PMICs is Supervisors, which provide power fail warning, power fail reset and other related advanced functions. The LM8365BALMFX45/NOPB is a popular choice of Supervisory Circuits from the LM family from Texas Instruments that has been gaining traction in the electronic market place.

Functional Overview

The LM8365BALMFX45/NOPB is a low-cost micropower 2.3V to 7V powered, univeral windowed watchdog timer with a voltage monitoring input counting feature. It is designed to monitor and indicator the power fail voltage threshold of the system, provide reset pulse and warn the user when the power fail voltage is inside the windowed or outside the windowed. It is an active low output that can be connected to microprocessor reset lines, as well as other components.

Unlike other power management solutions, the LM8365BALMFX45/NOPB not only monitors the voltage levels of the system, but also provides protection for processor reset lines and interrupts in a microcontroller-based system. This makes the supervisor circuit suitable for applications that require monitoring of a wide range of voltage levels, from very low ones used in microprocessor-based systems to the comparably higher levels used in industrial controllers.

Application Field

The LM8365BALMFX45/NOPB is particularly suitable for systems that require power management and reset protection, specifically in automotive and communication systems. Automotive engines and controllers require reliable power monitoring and reset protection due to the large number of independent modules that need to be managed and the unpredictability of their operations. The supervisor’s ability to detect power and reset faults quickly, while maintaining fault-tolerant operation even under highly dynamic conditions, makes it an ideal choice for this application.

The vast majority of modern communication systems require reliable power monitoring to ensure maximum throughput and reliability. Many of these systems utilize heterogeneous architectures that require the restart of subsystems and components during routines or abnormal conditions. The LM8365BALMFX45/NOPB can be used to monitor and protect these vital subsystems from unexpected failures, ensuring maximum reliability and throughput in these applications.

Overall, the LM8365BALMFX45/NOPB is a versatile power management solution for a range of applications. It provides a simple, cost-effective way to manage power and reset protection for microprocessor-based systems, automotive modules, and communication systems.

Working Principle

The LM8365BALMFX45/NOPB has two main components. First, a voltage monitoring monitor section, referred to as the monitor. This is a comparator-based circuit that will detect and indicate when the voltage has fallen between the voltage window of the power supply. Secondly, the reset signal generator is used to generate the reset signal. This is a monostable oscillator that will trigger a low signal if it detects a power fail within its window.

The monitor section utilizes the LM8365BALMFX45/NOPB’s adjustable threshold voltage of 2.3V to 7V. Within this range, the LM8365BALMFX45/NOPB will monitor the input voltage and compare it to the preset threshold values. If the voltage drops below a certain threshold within the window, the LM8365BALMFX45/NOPB will indicate a power fail. This indication can be used to trigger an interrupt or reset signal, depending on the system\'s needs.

The reset signal generator is also programmable, allowing adjustments between 0.9V and 4.5V. This allows the monitoring of a wide range of reset signals, so the system can be programmed to reset itself or return to a specified state in the event of a power fail. The LM8365BALMFX45/NOPB can also be programmed to delay the reset signal, so that the system has enough time to recover or prevent a fault.

Conclusion

The LM8365BALMFX45/NOPB is a low-cost univeral windowed watchdog timer with voltage monitoring input counting feature. It provides a robust power protective solution for a range of applications, from automotive and communication systems to microprocessor-based systems. The adjustable reset signal, wide range of thresholds and adjustable pulse timing make it a versatile, cost-effective and reliable power management solution.