MAX691EWE+T

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The MAX691EWE+T is a new form of supervisor chip in the field of power management integrated circuits (PMIC)—Supervisors. It is a versatile and configurable device that provides system reliability and ease of use to meet the varied needs of many systems as it offers versatile power-on reset/power failure detection and sequential reset sequencing. In this article, we will discuss the application field of the MAX691EWE+T and its working principle.

Application Field

The MAX691EWE+T is used in various application fields and there is a broad range of uses. Its primary application is the prevention of false resets caused by large in-rush currents, power failures, and brownouts caused by short-term power failures. Its max frequency of 4 MHz ensures that it captures any false reset signals that may occur. Additionally, it can be used for sequential resetting for CPU and DSP applications. It is also capable of controlling system shutdown when power is lost and activate a lead detecting sequence when the power supply recovers.

Working Principle

As with most PMICs, the MAX691EWE+T works in two ways to protect against false resets and power failures. The first stage is the power-on circuit. This circuit has adjustable trip points and a reset latch. The adjustable trip points allow the user to set a maximum and minimum limit for the power supply. When the power is below the maximum trip point or above the minimum trip point, the reset latch will be activated and a reset pulse will be sent out to alert the system that the power supply is unstable or if a power failure has occurred.

The second stage is the power-fail circuit. This circuit monitors the power supply voltage level to detect any power failure. If the power supply drops below a preset threshold the power-fail circuit will send out a reset pulse to notify the system of the power failure. This circuit also has adjustable threshold levels and a reset latch.

The MAX691EWE+T also provides little current and power consumption, meaning that it designers can supply reliable protection to the system without an additional concentrator. The easy to use reset sequencing feature also ensures that it can be used for complex reset systems that utilize multiple components.

The MAX691EWE+T is a versatile and powerful power supervisor chip that provides reliable protection to a variety of systems. Its adjustable threshold points and reset latches make it ideal for a broad range of applications and its low power consumption make it suitable for a variety of systems. Its reset sequencing feature also makes it suitable for a wide range of applications, from simple to complex designs.

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