S-1009N43I-I4T1U

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PMIC - Supervisors - S-1009N43I-I4T1U application field and working principle

The S-1009N43I-I4T1U is a supervisor IC for power management IC (PMIC). It is primarily used for power-on reset circuit applications. It uses a unique architecture, comprised of a P-channel/N-channel transistor pair, that allows for fast activation of the reset function even when power supply voltage is dropping. Additionally, it has an adjustable voltage output range and on-chip current limit.

The S-1009N43I-I4T1U is designed to detect voltage drop on power supplies and promptly activate the reset condition. It offers two operating modes – manual reset and automated reset – operating according to the application requirements. The manual reset is set when the voltage reaches a preset level, and the automated reset is set when the voltage dips below the specified level. Additionally, it includes active current limit for current monitoring and protection.

Applications

TheS-1009N43I-I4T1U is used in a variety of PMIC and power applications, such as automotive systems, home automation, industrial control, NFC/RFID, mobile phone, and computer peripherals. It can also be used in various communication systems. Additionally, it can be used in industrial applications that involve over-current, over-voltage and under-voltage detection.

Working Principle

The S-1009N43I-I4T1U utilizes an integrated NFET and PFET in order to provide fast power reset activation. This successively turns on the PFET when a voltage drop is detected, while the NFET turns off. The reset is activated when the voltage drops down below the preset level. When power reappears, the NFET resets the PFET, in order to ensure the system is brought back online quickly.

The S-1009N43I-I4T1U also includes four adjustable voltage dividers, which allows the user to set the exact power threshold at which the reset is enabled. It utilizes an active current limitation circuitry, which helps to ensure that the system does not draw too much power at once. This allows for some more current availability for important systems, such as processor cores. Additionally, it includes thermal protection to prevent high temperatures which can cause circuit damage and malfunction.

The S-1009N43I-I4T1U also features an ESD protection circuit which protects the system from static discharge and high level detrimental voltage. It also features over-voltage and over-temperature protection, which can prevent damage to the power supply or circuitry due to high voltage or temperature.

Conclusion

The S-1009N43I-I4T1U is an excellent addition to your power management IC. It offers fast activation for power reset and includes adjustable voltage dividers and active current limitation for increased safety and efficiency. Additionally, it includes ESD, over-temperature and over-voltage protection to ensure reliable operation under diverse conditions. Overall, the S-1009N43I-I4T1U is a reliable power management IC solution for use in applications with limited power supplies.

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