MAX6865UK22D1S+T

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Power Management Integrated Circuit (PMIC) covers a wide range of technologies to regulate, monitor, and control system-level voltage distribution and power consumption. Supervisors are a subsection in this class which typically refer to simple on-chip circuits with the purpose of implementing reset and monitoring of power supplies on the board. Supervisors are integral in many applications, offering protection against power supply-related problems and are an essential part of the power supply design.

The MAX6865UK22D1S+T is a small low-cost supervisor designed to monitor and control an array of voltage levels on the board. It is based on the MAX6865 monitor IC and features a wide selection of features such as power-on reset (POR) with choices of 3ms, 0.8s, and 512ms delay as well as 39 fail safe reset (FSR) monitors, including low-voltage under-voltage (LVR) and over-voltage (HVR). The MAX6865UK22D1S+T also includes on-chip voltage grade monitoring with up to 4-programmable voltage thresholds, watchdog timer counters with software reset capability and a power supply input for a controlled start-up sequence.

The MAX6865UK22D1S+T offers a wide range of applications including high power systems, server systems, telecom applications, satellite communications and wireless networks. This integrated device offers a cost-effective solution for implementing board-level power management requirements, such as low voltage irregularities, poor sequencing of events, high power draws, and malfunctioning peripheral devices, helping to reduce the amount of design time and achieving a high level of reliability.

The working principle of the MAX6865UK22D1S+T is quite simple. When the power supply is connected to the board, the integrated supervisor initiates a process of verification through the POR and fail safe reset circuits. The POR checks the selected voltage threshold and activates a reset if the threshold is exceeded, while the FSR circuit monitors several voltages for any irregularities, such as transient nominal voltage drops or over-voltage. If either circuit finds an abnormality, the appropriate reset is generated and the entire system is restarted.

In addition, the MAX6865UK22D1S+T includes several programmable features. These allow for more accurate monitoring and greater control of the power supply that is connected to the board. This includes start-up sequencing where the power supply is ramped-up according to the demands of the system, pre-charging of capacitors, and programming of the four voltage thresholds of the on-chip voltage grade monitoring circuit. As such, the MAX6865UK22D1S+T can be used to configure any application.

In conclusion, the MAX6865UK22D1S+T is a small yet highly efficient supervisor with many features that make it highly suitable for a variety of applications. Its simple design and powerful features make it an ideal choice for power management and safety. With its fast power reset and FSR features, it is also an excellent choice for monitoring voltage drops and irregular conditions on the board.

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