TL7700CPG4

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The TL7700CPG4 is an integrated, low-power supervisor and monitor device designed to provide reset, timing and voltage monitor, and system power supply management. It is commonly used in applications that require low power consumption, long battery life and robust system power, such as portable medical and measurement devices, industrial control systems, energy and environmental control systems, and home automation systems. This article will discuss the application fields and working principles of the TL7700CPG4.

Application Field

The TL7700CPG4 can be used as a system supervisor in a variety of applications. It provides low power management and reset/power glitch protection in microprocessor and digital systems. Its integrated low-power functions allow it to support extended battery life in portable and embedded systems. It can also be used to provide power supply sequencing, supply voltage margining and supply voltage monitoring.

The chip is particularly useful in monitoring the power supply of the system for undervoltage (VBO) or overvoltage (VBO) conditions. It can detect when the supply voltage falls below a predefined threshold (VBO1) or rises above a predefined threshold (VBO2). The TL7700CPG4 can also monitor and trigger a reset when the supply voltage drops below or rises above an intermediate threshold (VBO3) between the two predefined thresholds.

The TL7700CPG4 is suitable for use in applications that require multiple low power modes, such as standby and hibernation. It can also be used in power supply sequencing applications, where it can provide precise control over sequence transitions and supply voltage margining.

Working Principle

The TL7700CPG4 operates on a 3.3V power supply and can provide reset/power glitch protection and low power management as well as monitor the supply voltage for undervoltage (VBO1) or overvoltage (VBO2) conditions. The reset and power glitch protection circuit monitors the supply voltage, digital signal, delay signal, and internal reset. When any of these signals enter out of range, the IC will provide an output active low reset signal.

The TL7700CPG4 includes two comparators for monitoring the system power supply for under- or overvoltage conditions. It also has a configurable voltage threshold (VBO3) where it can interrupt the power supply and prevent further damage to the system if the supply voltage goes out of normal range.

The chip also has a low power mode where it can reduce the power consumption while monitoring the supply voltage and triggering the reset signal if necessary. It also has an enable pin which can be used to enable or disable the power management features.

The TL7700CPG4 is a highly integrated device with several features and capabilities that enable it to function as a system supervisor in a wide variety of applications. It provides support for extended battery life, low power management, reset/power glitch protection and supply voltage monitoring.

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