SP705CN-L

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PMIC (Power Management Integrated Circuit) are utilized to facilitate power supply regulation in a wide range of electronic applications. Within this category, supervisors provide built-in programming to regulate the operation of external components. The SP705CN-L supervisor is a low power CMOS IC offering up to five monitoring functions. It is particularly suitable to monitor the supply voltage at the microprocessor and then provide reset when it gets out of spec. The device also offers power-on reset as well as brown-out detection.

Applications.

The SP705CN-L is a versatile, low cost supervisory solution providing wide applications in computing and related markets. It supports different microprocessor architectures such as ARM Cortex M4, M3, A7, A5, A8, A9 and A10, which makes it suitable for the latest generation of smartphones, tablets, PCs, automotive control systems and enterprise applications. Similarly, its versatility allows it to be used with multiple peers, not just microprocessors, such as voltage regulators, ADCs, and audio ICs.

In addition to processor applications, the SP705CN-L is suitable for non-processor applications such as battery management systems and DC power inputs, voltage detectors and watchdog timer. Its small size and low current draw makes it suitable where space and power efficiency is critical, such as in miniature embedded systems, IoT applications, and space, industrial and automotive applications. Furthermore, the device is well suited for applications powered by batteries, as it reduces power leakage.

Working Principle.

The SP705CN-L has a wide monitoring range of 0-5V, allowing it to accurately detect supply voltage at the microprocessor. An internal voltage reference and comparator circuit detects brown-out conditions and an internal timer will pull the RESET signal low when the detected voltage is low. This ensures that the reset signal is held low until the voltage reaches valid levels for the processor to operate. There is an additional voltage monitoring function to monitor the CPU core and an internal timer for powering up the system. It works similarly like the brown-out detection where it will pull the RESET signal low when the detected voltage is low in order to protect the processor from overvoltage. As for power-on reset, the device will output a low logic level on the RESET pin when the power voltage reaches its operating voltage, so that the processor can start up safely.

The device also includes an open drain Reset_out signal output, providing an active high reset output loop back to the power supply and multiple reset systems. This output provides flexibility in reset generation and allows the system to recover from multiple reset conditions simultaneously. The device also offers external reset operation, providing flexibility in reset generation and allowing the system to recover from multiple reset conditions simultaneously.

Conclusion.

The SP705CN-L supervisor IC provides five monitoring functions in a single IC. Its low power draw and small size makes it suitable for use in wide range of applications including microcontroller, mobile, automotive and enterprise applications. Its adaptive reset timing mechanism and open drain reset output provides flexibility in reset generation and protection from multiple reset conditions, making it suitable for high reliability applications. Furthermore, its wide voltage range and versatile nature makes it an ideal solution for a wide range of electronic applications.

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