MAX806SCPA+

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Power Management Integrated Circuit (PMIC) is a microcircuit chip which principally authorized a system to restorable power management by controlling power flow within a system. It combines all necessary components in order to facilitate better integration and reduced number of discrete components which would be needed to manage and/or maintain various power aspects. One of the supervisory functions offered by PMIC is MAX806SCPA, which is ready for operation.

Applications

MAX806SCPA+ offers a high level of integration, especially in terms of the number of integrated components required. This translates to a reduced number of external discrete components and improved circuit board density and reliability. It is particularly suitable for battery-powered systems with low power consumption, such as cell phones and other handheld devices. Its advanced features also make it effective for digital still cameras and video cameras, connected appliances, and other systems.

The device can also be used in computer peripherals, such as I/O cards and digital audio systems, as well as industrial equipment and more. Since it offers adjustable system power supply voltage thresholds, it is particularly appropriate for ARM- and Xscale-based systems where the processor core supply voltage has to be adjusted.

Working Principle

The MAX806SCPA+ supervisor includes a precision voltage detector and two independently programmable reset outputs with separate active-low delay times and assertion levels. It requires only one external capacitance for proper delay time selection. This device is designed to perform system power-on reset (POR) and nonmaskable interrupt (NMI) functions with adjustable power supply voltage thresholds that can be used to monitor system voltage.

Voltage Detector

The MAX806SCPA+ voltage detector monitors the power supply voltage and determines whether an event has occurred to request an interrupt or reset. Using an external capacitor for threshold setting, it detects power supply voltages that are either above or below the preset threshold. The detection voltage is established by the capacitance value and is adjustable.

Reset Outputs

The MAX806SCPA+ contains two independent reset outputs. The reset outputs must be pulled high to logic 1 (VCC) to hold the reset state. When a power supply voltage event causes the voltage detector to assert reset output, both outputs will go low, indicating to the reset handler that a reset has occurred. The reset outputs return to the high state when the power supply voltage reaches the preset threshold.

Delay Times

The MAX806SCPA+ offers programmable delay times for both outputs, selectable with an external capacitor. The delay time varies from 0.5ms to 64ms. Outputs also have independent assertion levels, which can be adjusted with a resistor to the VCC or GND. Output active states can be adjusted to the high or low level for control of system reset.

Conclusion

The MAX806SCPA+ supervisor is a power management integrated circuit designed for a wide range of applications. It offers a high-level of integration, reducing the number of necessary components while providing adjustable system power supply voltage thresholds. The device also includes two individually programmable reset outputs, with adjustable active-low delay times and assertion levels. With its powerful features and reliable performance, the MAX806SCPA+ is sure to be an effective power management solution.

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