APX803S00-44SA-7

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PMIC (power management integrated circuit) or supervisors play a major role in the contemporary industry, particularly with regards to power management in micro-electronics. This article aims to discuss the application field, working principle and features of the particular PMIC product, APX803S00-44SA-7.

The APX803S00 is specifically designed to provide over-voltage and surge protection for general-purpose system applications. It has a low quiescent current of 66 μA, making it suitable for battery-powered applications. This device also has various features such as power management, three power-on reset outputs, and two watchdog timer outputs, among others. Additionally, it also offers circuit protection including short-circuit, surge, noise and ESD protection.

The core of the APX803S00-44SA-7 is a voltage reference circuit and a precision voltage comparator. This circuit will compare the system voltage with a fixed IC reference voltage. When the system voltage is lower than the IC reference voltage, the power-on reset (POR) output will be \'low\', indicating a power-up. When the system voltage is higher than the IC reference voltage, the POR output will be \'high\' open drain or TTL compatible which used for reset controller or processor. With the two watchdog timer outputs, Watchdog 1 can be programmed with a selectable timeout period while the Watchdog 2 has a fixed timeout period of 128 seconds. Both watchdog programmable outputs can act as reset outputs to power cycle the system when a fault is detected.

The APX803S00-44SA-7 can also provide circuit protection, including short circuit, surge, noise and ESD protection. The device can detect over-current conditions through its current limit circuit. When excessive current is detected, it will limit the output current and provide protection for the device. Furthermore, this PMIC also provides both common-mode and differential-mode ESD protection. The device uses its ESD clamp diode to limit and absorb transient currents, safeguarding the system from potential ESD events.

In conclusion, the APX803S00-44SA-7 PMIC is primarily used for system over-voltage protection and power management. Its voltage reference circuit and precision voltage comparator allow for the detection and power-on reset of the system. Various features such as surge, short circuit, and ESD protection are also provided for added system safeguards. Its low power consumption also makes it suitable for battery-powered applications. With these features combined, the APX803S00-44SA-7 PMIC is an ideal choice for power management applications.

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