Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Push-Pull
Reset:	Active High/Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.61V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	MAX792

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Introduction

The MAX792RCSE+ is one type of PMIC or power management IC, which is a complex integrated circuit and a class of devices used to manage power requirements in portable devices or consumer electronics. PMICs are used to improve the performance of devices and systems by reducing power consumption and enhancing power delivery and management. The MAX792RCSE+ is an ultra-low power supervisory circuit that can be used to monitor varying conditions in devices such as overvoltage or undershoot. This Application Note is intended to provide an overview of the operating principles and features of the MAX792RCSE+ and describe its application fields.

Overview of the MAX792RCSE+

The MAX792RCSE+ is a high performance, low power, low voltage supervisory IC used in battery-operated applications. It has a 4.65V to 5.5V input voltage range and is available in a 5-pin SOT-23 package. It features an active-low reset output, a watchdog timer output, and an active-high system power-on reset output. It also features a power output for driving an external switch or FET and a push-pull output enable pin. The reset output remains asserted or low whenever the input voltage drops below the set threshold voltage or when the watchdog timer times out. It also includes segmented timeout and push-button reset functions.

Operating Principles of the MAX792RCSE+

The MAX792RCSE+ is designed to monitor the system\'s supply voltage and prevent the system from being damaged by overvoltage or undershoot. The voltage-monitoring section is composed of a comparator, which compares the input voltage (VIN) relative to an internal bandgap-referenced voltage (VREF). The output of the comparator will be asserted or low when the input voltage drops below the internal reference voltage. When the normal supply voltage is above the VREF, the output will remain de-asserted or high.The reset output remains asserted or low until the VIN increases above the VREF. The timer will be started once the VIN exceeds the VREF, and the output will remain asserted until the timer times out. Once the timer times out, the reset output will be de-asserted and the MAX792RCSE+ will be ready for the next reset cycle.The MAX792RCSE+ also features a watchdog timer that can be used for monitoring any task or process in the system. The watchdog timer is reset by either the rising edge of a user-defined input signal or the leading edge of the reset output. The watchdog timer will be restarted when the system is reset, and the reset output is asserted. This helps to prevent system failures due to runaway processes.

Applications and Usage of the MAX792RCSE+

The MAX792RCSE+ can be used in a wide range of applications such as portable or handheld devices, embedded systems and consumer electronics. Its low power and low voltage operation makes it suitable for battery-operated applications and systems that require power saving operation. Examples of such applications include portable data loggers, smart phones, tablet computers, and embedded systems.The MAX792RCSE+ is typically used in battery-dependent systems that require low-power operation, to protect the system by resetting itself in case of power failure or voltage overshoot or undershoot. It is also used in many applications to provide voltage monitoring and reset sequencing functions.In addition, the MAX792RCSE+ can be used to provide system monitoring functions. The on-chip watchdog timer is used to monitor any task or process in the system and reset the system in the event of a system failure. Similarly, the push-button reset feature allows the user to manually reset the system in case of any errors or faults.

Conclusion

In conclusion, the MAX792RCSE+ is an ultra-low power supervisory IC designed for battery-operated applications that require low power and low voltage operation. It features an active-low reset output, a watchdog timer output and an active-high system power-on reset output. The on-chip segmented timeout and push-button reset functions are used to provide system monitoring functions. The MAX792RCSE+ is used widely in portable or handheld devices, embedded systems and consumer electronics to protect the system in case of power failure or voltage overshoot or undershoot.

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