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PMIC - Supervisors: S-1004NA11I-I6T1U Application Field and Working Principle

The S-1004NA11I-I6T1U is a supervisor IC that is used to protect a variety of consumer and industrial electronic devices. This supervisor is widely used in applications that require precise and accurate power management and devicesthat require robust reset protection. It is a precise, cost-effective, andhigh temperature stable voltage supervisor that combines the latest supervisory circuit topology, small form factor and SMBus interface capability. It is designed to protect sensitive circuits from over voltage or under voltage conditions with precise voltage monitoring and reset control.

Overview

The specific features of the S-1004NA11I-I6T1U are as follows:

• 1.5V Power-on Reset (POR)
• Programmable Brown-Out Detect (BOD) Level
• Integrated Watchdog Timer
• Integrated Power-on Reset Output (POR) and Power Good Output (PG)
• Operating voltage of 1.65 - 12V
• Temperature sensing input with programmable reset delay at High temperature and Low temperature(optional)
• External reset input, SMBus Interface and command interface

It is also endowed with full protection and a broad application range, meaning that it can be used in various applications, such as TV sets, set-top boxes and monitors to regulate the power supplyof the device.

Working Principle

At a high level, the S-1004NA11I-I6T1U works by monitoring the power supply voltage and triggering the reset / interrupt state if the voltage is out of the range set by the user, or the temperature exceeds the programmed level. The S-1004NA11I-I6T1U monitors the voltage on its VIN pin, and when an out of specification voltage is detected, it will engage the reset / interrupt output pin. The reset / interrupt output pin provides active low logic output indicating when the voltage is out of specification.

The S-1004NA11I-I6T1U also includes an adjustable power-on reset circuit. The power-on reset circuit monitors the VCC pin input voltage, and when it reaches the power-on reset conditions, it triggers active low reset output. This will reset all device registers to their default values and provide an active low logic output to indicate the power-on reset condition.

The S-1004NA11I-I6T1U also incorporates an adjustable Watchdog timer (WDT). This timer provides an active low logic output to indicate when the WDT expires. If the WDT is not reset before expiry, the reset / interrupt output pin and the output from the power-on reset circuit will be activated.

In addition to the voltage and temperature monitoring features, the S-1004NA11I-I6T1U offers an SMBus and command interface for communication and control. This interface can be used to adjust settings, monitor the device and modify the behaviour of the reset / interrupt output.

Conclusion

The S-1004NA11I-I6T1U is a highly integrated and reliable voltage supervisor IC that is widely used in various consumer and industrial applications. It offers various features including voltage monitoring,power on reset, temperature monitoring, and adjustable Watchdog Timer. It also offers an SMBus and command interface for communication and control.

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