APX809S00-46SA-7

PMIC - Supervisors

Power management integrated circuits, commonly referred to as PMICs, are electronic components and devices designed to control and monitor the power supplied to various circuits in an electronic system. Supervisors are a type of PMIC, primarily responsible for reset and power-on/off functions. The APX809S00-46SA-7 is an example of such a device, marketed by Advanced Power Electronics Corporation, intended to provide essential functions for system reset and low voltage detection in a single package.

Application Field

The APX809S00-46SA-7 is well-suited for a variety of applications such as embedded systems, servers, computers, and mobile devices. It is designed to provide a simple, cost-effective solution to the issue of system reset and low voltage detection, while also offering breakout processing, configurable reset thresholds, and advanced reset delay functions. Furthermore, this device offers a wide input voltage range (2.6V – 6V), 625 µA quiescent current, and a very low temperature coefficient, allowing for robust system designs.

Working Principle

The APX809S00-46SA-7 is composed of multiple transistors and capacitors arranged in a complex circuit. This arrangement enables the supervisor to provide four main functions: System Reset, Power On Reset (POR), Power Off Reset (POR), and Low Voltage Detection (LVD). The reset functions provide protection against the problems associated with incorrect power or initial power-up conditions, while the low voltage detection allows for a configurable system response to battery, power supply, and other voltage supply errors.

When it comes to system reset, the APX809S00-46SA-7 provides a reset pulse of either active high or active low, depending on the configuration. It also has a configurable reset pulse width and adjustable reset threshold for customizing the device for user-specific applications. This is especially useful in applications with multiple voltage supplies, which allow for extended hold-up times needed during voltages drops.

The power on and power off reset functions provide a controlled method of power-cycling the system, while the low voltage detection feature is used to proactively detect potential system issues related to voltage drops. The low voltage detection is provided through a configurable threshold, which can be set to match specific requirements. The low voltage detection also includes an adjustable reset pulse width, allowing for delayed initialization.

In addition to the primary functions, the APX809S00-46SA-7 also offers enhanced features such as over-temperature protection and over-voltage detection. With these features, it is capable of providing control over temperature and voltage levels, ensuring optimal performance. It can also provide an isolated reset line if needed, which enhances system robustness and helps to protect against accidental interaction between reset signals and other system components.

Conclusion

The APX809S00-46SA-7 is a versatile supervisor designed for a range of embedded systems and applications. With features such as adjustable reset thresholds, high voltage operating range, and a low temperature coefficient, the APX809S00-46SA-7 provides a highly reliable solution for system reset and low voltage detection. It is well suited to applications such as servers, computers, mobile devices and other embedded systems.