MAX691EWE+

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Battery Backup Circuit
Number of Voltages Monitored:	1
Output:	Push-Pull, Push-Pull
Reset:	Active High/Active Low
Reset Timeout:	35 ms Minimum
Voltage - Threshold:	4.65V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	MAX691

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MAX691EWE+ Application Field and Working Principle

MAX691EWE+ is a voltage supervisor (supervisory) integrated circuit for use in mobile and portable electronic devices. It is part of the Power Management IC (PMIC) - Supervisors family, designed to ensure correct initialization and system operation in embedded systems, while monitoring voltage levels and other parameters. The MAX691EWE+ manager is a robust, low-quiescent-current system-reset controller and can handle up to 3.6V input current.The MAX691EWE+ is an ideal choice for power-supply, battery-backup, and system-monitoring applications. It provides an easy-to-use and low-power solution, with low power consumption and high accuracy. Its built-in voltage supervisor feature can be used to monitor and maintain system power. Additionally, the MAX691EWE+ monitors the battery voltage and provides an early detection of low-voltage conditions. It also includes safety features to prevent circuit malfunctions, such as over-temperature, over-current and over-voltage protection.The MAX691EWE+ can monitor multiple voltage rails and its output can be used to control a system reset, system sleep mode, or an external supervisor. It includes two fixed voltage comparators; one is dedicated to monitoring the system power supply, and the other is used to monitor other voltage rails such as the battery. The MAX691EWE+ is also designed to provide internal supervision of the power-on reset (POR) and other active-low stimuli.This IC is ideal for many embedded system applications in which low power consumption and high accuracy are desired. The MAX691EWE+ can help minimize system costs by reducing the number of external supervisors and system components. By using the MAX691EWE+, designers can reduce system power consumption while improving system accuracy.When it comes to working principle, the MAX691EWE+ has two voltage comparators which monitor the system power supply and the other voltage rails that are connected to the IC. The comparator outputs are used to control the system reset, system sleep mode, and an external supervisor. The MAX691EWE+ has an internal power-on reset (POR) as well as an active-low input for power-on reset. Additionally, the MAX691EWE+ monitors the battery voltage and provides an early detection of low-voltage conditions. The MAX691EWE+ also includes safety features to prevent circuit malfunctions, such as over-temperature, over-current, and over-voltage protection.The MAX691EWE+ is a robust, low-quiescent-current system-reset controller and can handle up to 3.6V input current that enables it to accurately monitor multiple voltage rails. It can also be used as a stand-alone supervisor by programming any external supervisor port with an adjustable VDD threshold. The MAX691EWE+ can be used to detect system wakeup events and provide control lines for wakeup signals.The MAX691EWE+ is designed with a choice of three power-supply requirements, namely a 3.3V supply voltage, a 4.5V minimum supply voltage, and a 5.5V minimum supply voltage. The MEBRSEC pin provides an input reference for power supply sequencing and droop detection in multiple-supply systems. The BDn pins indicate the level of input over-voltage protection for the +3V power rail. The OVERT pin is used to indicate an over-temperature condition and the NRES pin is used to signal an active-low reset condition. Finally, the low power consumption and high accuracy of the MAX691EWE+ ensures minimal system burden, enabling designers to reduce their system costs.In summary, the MAX691EWE+ is an ideal choice for power-supply, battery-backup, and system-monitoring applications. It provides a low power solution with low power consumption and high accuracy. Its built-in voltage supervisor feature can be used to monitor and maintain system power while providing safety features to prevent circuit malfunctions. The MAX691EWE+ has two voltage comparators that monitor system power and other voltage rails, while providing early detection of low-voltage conditions. Additionally, the MAX691EWE+ is designed with three power-supply requirements and its low power consumption, high accuracy, and cost-effective design ensure minimal system burden.

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