MAX6414UK42+T

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Power management integrated circuits (PMICs) incorporate multiple power management functions for power supply design, all in one integrated circuit. PMICs are significantly easier to implement than discrete designs and result in a much more efficient end product. PMICs are commonly used in product designs across a broad range of applications in consumer, computer, communications, automotive, industrial, instrumentation and medical markets.

PMICs are divided into several categories: linear regulators, switching regulators, power converters, power switches, battery and charger management, power distribution, and supervisors. Supervisors are highly specialized PMICs that provide voltage monitoring systems to protect a system or provide warning signals or monitoring signals to power circuits. In this article, we focus on MAX6414UK42+T applications and working principle.

Introduction to MAX6414UK42+T

The MAX6414UK42+T from Maxim Integrated is an integrated circuit (IC) supervisor, designed for high-current, low-voltage applications. The IC has two functions: first, it monitors the voltage of the system; second, it allows for reset or interrupt of the system. The MAX6414UK42+T is capable of monitoring low voltage sources from 0.8V to 5V and has maximum adjustable reset delay up to 100ms. The device has an integrated low-power LDO and can provide power to a microprocessor or accessories independently of the main power supply, while monitoring the reset pin of the processor.

The MAX6414UK42+T includes power-on reset, precision voltage monitoring, and an oscillator. The device also supports an external reset source so that users can extend reset times or trigger an active reset. It has an adjustable delay of 3ms to 100ms, which allows users to accurately control the delay time. In addition, the device has a low supply current of 2µA and is available in an 8-pin ultra-small package, providing excellent integration and a high level of power efficiency.

MAX6414UK42+T Application Field

The MAX6414UK42+T is suitable for use in a wide range of low-voltage applications, including automotive applications, cellular telephones, handheld communication devices, consumer products, medical and industrial electronic equipment, and power-sensitive systems. It can effectively monitor the voltage levels of these systems and, when needed, reset the system or issue an interrupt signal.

In particular, the device can be used as a power-on reset for microprocessors and other digital circuits, and can be used to control power sequencing of multiple power supplies, as well as provide a system failure indicator. The device can also be used to implement a Watchdog Timer (WDT) for embedded systems, by periodically monitoring the reset pin of the system and resetting it when necessary. Additionally, it can detect power-down conditions, over-temperature conditions, short circuits, and battery-low warnings.

MAX6414UK42+T Working Principle

The MAX6414UK42+T utilizes an integrated oscillator to control time delay, with a minimum time delay of 3ms and a maximum time delay of 100ms. The device contains a voltage comparator circuit that compares the input voltage with a pre-set reference voltage, typically 1.255V or 2.5V, or a voltage supplied to the device by an external source.

When the input voltage falls below the reference voltage, the device will trip and the outputs will be set accordingly. The delay timer begins at the moment the voltage drops below the reference voltage, and it will continue to count until it reaches the user-programmed delay time. Once the delay has expired, the outputs will be set according to the trip point.

The MAX6414UK42+T also has two comparator reference pins (VIN+ and VIN-) that allow for monitoring both low and high voltages. When low voltage is detected, the two VIN pins will be connected together, allowing for a quick response and an accurate detection of the voltage threshold values.

Conclusion

The MAX6414UK42+T is a low-voltage supervisor that can be used in a wide range of applications, including automotive, consumer, medical and industrial electronic equipment, and power-sensitive systems. It is capable of monitoring low voltages from 0.8V to 5V, and can detect power-down conditions, over-temperature conditions, short circuits and battery-low warnings. The device\'s two voltage reference pins (VIN+ and VIN-) allow for monitoring both low and high voltages. The MAX6414UK42+T also features an adjustable delay of 3ms to 100ms and a low supply current of 2µA.

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