CAT1027LI-45-G

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The CAT1027LI-45-G is a high precision micro-power, reset supervisor voltage monitoring circuit with an I2C interface. It is a member of the supervisory family of products from ON Semiconductor. It functions as a reset controller, providing a reset warning signal when monitored system conditions exceed programmable limits. It is specifically designed for Li-ion battery-based applications in portable electronics such as cell phones, PDAs, and notebooks, requiring low-power operation and high accuracy.

The CAT1027LI-45-G utilizes an ultra-low drop-out voltage (0.2 V @ 1 mA) voltage monitor to provide very accurate voltage measurement and reset generation. It features a programmable input range selection and reset warning signal. This feature allows it to be set to monitor system voltages without the need for manual adjustment or external components. The reset output is able to be set to active-Low or active-High active polarity. The reset comparator can be disabled to reduce power consumption, and an analog-to-digital converter (ADC) is available for sensing the power supply voltage.

The CAT1027LI-45-G also has integrated outputs for To-Go power supply detection, and sleep and wake functions. The To-Go power supply detection output allows the user to determine when the system is connected to an external power supply; the sleep and wake output allows the user to put the system into low-power sleep mode after a system monitor limit has been exceeded. In addition to these features, the CAT1027LI-45-G also has a programmable delay time setting and a de-glitch time setting for suppressing transients.

The CAT1027LI-45-G utilizes a 1.8 V to 5.5 V supply voltage range and can be operated in either Automatic or Manual reset mode. It can detect small supply voltage changes, keeping the voltage measurement accuracy at 0.2 mV while consuming only 160 μA of current.

The CAT1027LI-45-G is a high precision micro-power, reset supervisor voltage monitoring circuit. Its wide supply voltage range, accurate measurements, low-power operation, and programmable reset warning signal make it suitable for use in many Li-ion battery-based applications. Its integrated To-Go power supply detection output, sleep and wake output, programmable delay time, and de-glitch time settings make it an ideal choice for managing system reset and voltage monitoring. It is a reliable, cost-effective solution for providing system reset and low-power operation in battery-powered applications.

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