APX803L-46SA-7

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APX803L-46SA-7 Application Field and Working Principle

Power management integrated circuit (PMIC) is a type of integrated circuit (IC), which is designed to manage the power supply and peripheral components required for a existing system. PMICs have enabled the development of many personal electronic products such as cell phones, tablet computers, digital cameras and audio devices.

PMICs have emerged as one of the greatest advances in the area of power management and continue to play a crucial role in modern electronic systems. These devices integrate various features necessary for powering microprocessors and other electronic components, providing precise power management control and protecting the system from harmful power conditions.

A PMIC supervisor can provide precise power-on sequencing and is an important component for protecting the system from faults and power failures. APX803L-46SA-7 is a low power, octal voltage supervisor for system-level power management. It is designed to protect systems from overvoltage/current, over/under temperature, operating conditions or power failures.

Application Field

The APX803L-46SA-7 is suitable for a wide range of applications. It is typically used in mobile phones, tablet computers, consumer electronics and embedded applications, where low quiescent current, low power consumption and low cost are important considerations.

It offers various features such as overvoltage/current monitoring, power-on reset and undervoltage lockout, as well as protection from over/undershoot transients. The octal voltage supervisors also offer advanced features such as input filter, hysteresis and delay. Moreover, the ultra-low power consumption makes it an ideal choice for battery-powered applications.

Working Principle

The APX803L-46SA-7 is an octal voltage supervisor that provides reliable system level power management. It consists of eight channels of input voltage supervision and one common output. Each individual input is capable of monitoring voltages from 0.8V to 7.2V. The input voltages are compared with an internal reference voltage, and when any of the eight channels reaches above or below the reference voltage, an active-low reset signal is asserted. The reset pulse width is typically 100ms. All channels have to pass their test before the reset is de-asserted and the system allowed to enter operating mode.

The device includes two internal delay elements for power-up/power-down sequencing. The "start-up delay" feature allows the system to stabilize before reset is de-asserted and it is used to set up a sequence in order to "power on" the different components in the system according to the desired order. The internal "shutdown delay" feature is used to establish a sequence when the system is shutting down.

In order to provide protection against over/under voltage, current, temperature and other environmental changes, the APX803L-46SA-7 offers numerous features such as input filter, hysteresis, power-on reset (POR), undervoltage lockout (UVLO) and overtemperature shutdown (OTS). These features provide a reliable level of protection to the system and components connected to it.

Furthermore, the device also offers programmable overcurrent and overtemperature limits. This feature allows the system to be operated in a more efficient and safe way, as it can be programmed to automatically shut down when it detects the presence of an overcurrent or overtemperature situation.

Overall, the APX803L-46SA-7 can provide a reliable level of power management and system protection from faults or power failures. Its versatile features make it suitable for a wide range of applications, such as mobile phones, tablet computers, consumer electronics and embedded applications.

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