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PMIC - Supervisors

The MIC708M is a highly integrated circuit that provides a comprehensive suite of power management capabilities. It is designed to help system designers create systems that meet a wide range of industrial and consumer demands.

Application Field

The MIC708M is suitable for portable, battery-powered systems. It is intended for use in embedded systems where low power consumption and high functionality are both important considerations. It can be used to control power supply sequencing and sequencing of system components, such as memory and processor. It can also be used to implement system diode isolation and controller power-up skew. Additionally, it provides power monitoring and system-level temperature sensing that can be used for temperature control as well as over temperature protection.

Working Principle

The MIC708M is capable of providing power supply sequencing, monitoring and temperature sensing functions. It has an on-chip regulator, the MIC710-L, which performs voltage regulation using an internal comparator circuit. It is controlled by the MIC709-D, which provides control logic to set the desired output voltage. Additionally, it has an on-chip programmable timer and pulse width modulators that can be used to control the power supply sequencing. The MIC703-C provides an internal supply voltage monitoring capability, while the MIC702-A provides analog temperature sensing. Finally, the MIC701-M provides an internal temperature protection.

In order to use these components, the MIC708M must be connected to the system itself. It requires two power sources, the first being the system power supply and the second coming from the MIC708M\'s own internal battery. The power sequencing circuitry is enabled through the use of dedicated pins that control MIC709-D and MIC710-L components. The control logic of the MIC709-D provides power sequencing and the MIC710-L performs the voltage regulation.

The MIC703-C is used to detect system power-up voltages and automatically control the power sequencing through the use of a patented “Smart Sequencing” algorithm. This algorithm also allows for system-level temperature monitoring through the use of temperature conversion techniques. This algorithm also allows for sensing of temperature and enabling of over-temperature protection when necessary.

Finally, the MIC710-L can be used to provide system level voltage monitoring, allowing for voltage control, power monitoring and system power down. With this feature, the MIC708M can initiate system shut down in case of an overload, over-temperature condition or any other system power malfunction.

Conclusion

The MIC708M is a highly versatile power management integrated circuit that can be used to create reliable and energy efficient embedded systems. It contains a comprehensive suite of components that can provide voltage regulation, power sequencing, system-level power monitoring and temperature protection. Its use in embedded systems is growing as it helps improve system reliability, energy efficiency and overall performance.

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