APX803S-40SR-7

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PMIC - Supervisors are an important group of products that can detect and protect power supply systems and circuits. The APX803S-40SR-7 is a product in this group that can be used in a variety of applications. This article will discuss the application field and working principle of the APX803S-40SR-7.

The APX803S-40SR-7 is designed primarily for handheld wireless applications. It is suitable for use in both 3V and 5V applications, providing protection from overvoltage, undervoltage, and related electrical hazards and also providing input-state monitoring of the device. It can be used to detect supply voltage level in consumer and commercial applications such as cell phones, handheld navigation systems, and PDA devices. It is also suitable for other battery-powered portable products, such as cameras, Bluetooth headsets, and radios.

The APX803S-40SR-7 has an integrated power FET to regulate overvoltage protection and reverse battery protection. It is designed to be connected to the positive and negative supply rails of the system and can detect the voltage level from 0V to 40V. When the voltage reaches the trip point, typically 0.3V below the nominal voltage, the power FET is switched off, thereby protecting the system from overvoltage events. Furthermore, when the supply voltage level drops below the trip point, the power FET is autonomously switched on again, thus providing voltage level monitoring.

The APX803S-40SR-7 also features an active droop detection circuit, which can be used to detect the occurrence of a short circuit or overcurrent event. When an overcurrent is detected, the droop detection circuit will react by trippin, warning the user of a potential problem. In addition, the device also features an active output voltage monitoring circuit which can detect if the output voltage of the system has dropped below a certain threshold, thereby preventing further damage to the system.

The APX803S-40SR-7 is constructed on a small, low-cost ceramic package that is particularly suitable for use in small, battery-powered systems. It has an operating temperature range of -40°C to +85°C, making it suitable for use in a wide range of environments. The device also boasts a low quiescent current of 1.2µA, making it ideal for extending battery life.

In conclusion, the APX803S-40SR-7 is a versatile supervisor designed for handheld wireless applications. It can provide protection from overvoltage, undervoltage, and other electrical hazards, as well as input-state monitoring, droop detection, and output voltage monitoring. It is constructed on a small, low-cost ceramic package, making it suitable for use in even the most compact systems. Furthermore, it offers a low quiescent current and wide operating temperature range, making it ideal for extending battery life.

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