MAX6355LSUT+T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	3
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	100 ms Minimum
Voltage - Threshold:	2.93V, 4.63V, Adj
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-23-6
Supplier Device Package:	SOT-23-6
Base Part Number:	MAX6355

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MAX6355LSUT+T - PMIC Supervisors

PMIC (Power Management Integrated Circuit) supervisors are essential components of critical power architectures, endowing them with the ability to safeguard their critical systems. MAX6355LSUT+T, short for MAX6355 Low-Voltage/Low-Power Supervisory and Temperature-Sensor IC with WIDE-RANGE Reset, is one such PMIC supervisors manufactured by Maxim Integrated, designed for resetting and monitoring systems requiring low-voltage, ultra-low power consumption and tight reset thresholds.

Applications

The MAX6355LSUT+T is suitable for a range of applications, such as power-sensitive or battery-powered systems that require a low-voltage reset, and even real-time clock (RTC) circuits for monitoring the system\'s power-on status. This IC is often found in home appliances, consumer electronics, medical equipment, and industrial and automotive applications.

I/O Supply Voltage Specifications

The MAX6355LSUT+T has an input voltage range of 1.0V to 4.63V, and an output high voltage of 1.8V to 3.63V. The output low voltage is between 70mV. This makes it an ideal choice for applications where power control has to be taken into account. Its shutdown current is typically 1 µA, and it has a wide range of power-on reset (POR) threshold voltags from 1.0V to 4.63V.

Temperature Sensor

The temperature sensor on the MAX6355LSUT+T uses an internal temperature reference to deliver an accurate temperature signal in the range of –25°C to 125°C. This signal can be output via the INT/TEMP pin.

Comparator and Wristband Functions

The MAX6355LSUT+T has an on-chip comparator and a window comparator, allowing the IC to monitor power supply voltages while providing protection against power rail fluctuations. It also has an integrated wristband circuit to detect fault conditions and reset the system.

Features

The MAX6355LSUT+T is a low-power, small-footprint PMIC supervisor IC offering a selection of features in its very small form factor. These include an extremely low supply current of 0.3µA at 3V, a reset active time of 10µs, and a watchdog timeout period of 2.5s. It also integrated automatic reset pulsing and a service logic pin that outputs a pulse whenever any of the device\'s protection features are active.

Package

The MAX6355LSUT+T is available in a 6-Pin SC75 package (1.626mm x 1.026 mm). It is also available in 6-Pin DSBGA and 4-Pin DSBGA packages for additional reliability in high-vibration environments.

Working Principles

The MAX6355LSUT+T works by monitoring the voltage of a connected power supply and performing a reset if it falls below the device\'s reset threshold. It monitors the power supply voltage level through an on-chip comparator and an external series resistor, both connected in parallel with the power supply.The IC also has a watchdog timer that can be used to reset the system when it experiences a fault condition. The timer is started and stopped when the WDI pin is taken to a logic HIGH and logic LOW respectively. If the timer overruns due to a fault condition, a reset will be triggered. The integrated wristband circuit in the MAX6355LSUT+T is used to provide extra protection against fault conditions. The wristband circuit monitors the WDI pin, and if the pin remains HIGH for too long, it triggers a reset.Finally, the temperature-sensing mechanism of the MAX6355LSUT+T allows it to detect any thermal overload conditions in the system by comparing the temperature signal output from the internal temperature-sensing circuit against the configured temperature limit. If the temperature rises beyond the threshold, the IC will pull the RESET pin to a logic LOW and reset the system.

Conclusion

The MAX6355LSUT+T is a highly integrated PMIC supervisor IC designed for low-voltage, low-power, ultra-low power consumption and tight reset threshold applications. It has an extremely low shutdown current and a versatile selection of features including a watchdog timer, temperature sensing, a window comparator and automatic reset pulsing. Its wide input voltage range and range of package options make it highly suitable for a range of home appliance, consumer electronic, medical and automotive applications.

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