LM809M3-4.63

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Power management integrated circuits (PMICs), such as the LM809M3-4.63, are widely used in many electronic products. These devices protect the system from potential damages such as short-circuits, over-voltage and over-current, while optimizing design costs.

PMICs are typically divided into regulators or supervisors, depending on the application needs. Regulators ensure the power supply of the system and manage the mapping of the voltage level on the different power rails. Supervisors, on the other hand, provide protection for different areas of the system; for instance, for the input supply and output load, as well as for the digital/analog domains.

The LM809M3-4.63 is a supervisor from Texas Instruments’ family of precision micropower supervisors. It is a three-terminal device with fixed output voltage, suitable for single-supply voltage monitoring in consumer electronics and automotive applications.

Application fields of the LM809M3-4.63

The LM809M3-4.63 has a wide variety of applications in consumer electronics and automotive systems. It is designed to monitor a battery or a single-supply output to protect against low-voltage and open-circuit conditions. This device is suitable for high frequency, microprocessor-based systems.

In consumer electronics, the LM809M3-4.63 can be used in portable systems, such as laptops and mobile phones, where a battery is connected to protect against low-voltage conditions. This supervisor can also be used in automotive applications, such as Electronic Control Units (ECUs) of electronic stability control (ESC). By placing this supervisor between the battery/power supply and the ECU, the system can be protected from over-voltage, over-current and short-circuit conditions.

Working Principle of the LM809M3-4.63

The LM809M3-4.63 is a precision micropower supervisor with a fixed output voltage. The device operates over a wide input voltage range from 1V to 6.5V. It is designed to monitor a single-supply voltage, in order to protect the system from a low-voltage condition. The output voltage is guaranteed to be 4.63V ± 1%, ensuring accurate voltage level detection.

The device operates in two main modes: “normal” mode and “fault” mode. The “normal” mode is enabled when the input voltage is within the preset voltage threshold of 4.63V ±3%. When the input voltage falls below the threshold, the device switches to “fault” mode and the output voltage begins to fall, resulting in a system reset or power-down. The device is also equipped with an over-voltage protection feature, which prevents the output voltage from exceeding the preset voltage threshold.

The LM809M3-4.63 is a highly efficient and reliable device that offers low-cost voltage monitoring and protection. Its wide range of applications, from consumer electronics to automotive systems, makes it an ideal choice for many different systems.

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