CAT1641LI-28-G

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The CAT1641LI-28-G is a versatile voltage monitoring IC manufactured by ON Semiconductor, designed for advanced industrial products. It provides a power-on reset, power-fail warning and housekeeping functions, and is also capable of serving as a low drop-out linear regulator and overvoltage protection. The device can be used in many applications such as automotive, consumer electronics, and industrial control applications.

Application Field of CAT1641LI-28-G

The CAT1641LI-28-G is a highly integrated power monitoring device, making it suitable for a wide range of applications including automotive, consumer electronics, and industrial control applications. The device can serve as a voltage supervisor, power reset, power-fail warning, overvoltage protection, and low drop-out linear regulator. It is normally used as part of a power management system to ensure that a system stays within the specified voltage window and that the power-up sequence is properly followed.

The device can monitor two power supplies: one for the system and the other for the monitoring ground reference voltage. The CAT1641LI-28-G also features an adjustable overvoltage threshold that can be configured through an external resistor, providing a wide range of monitoring options. Finally, the 1.95 V internal supervision voltage allows users to set a power-on reset level far below the nominal supply voltage, allowing for better protection against power surges and brownouts.

Working Principle of CAT1641LI-28-G

The CAT1641LI-28-G is a power monitoring IC with an adjustable overvoltage threshold. When the input voltage exceeds the programmed threshold, the reset output pin becomes active, alerting the system processor to enable proper and safe shutdown. The IC also has an active low power-fail warning output, informing the system that the power supply is below the power-on reset level. In addition to this, the device also features a low drop-out linear regulator (LDO) capable of dropping up to 10V, allowing it to supply a stable voltage to the microcontroller.

The device has two input supply lines: one for the system voltage and the other for the monitoring ground reference voltage. When the input voltage exceeds the programmed threshold, the reset output pin becomes active and the power-fail warning output is asserted. When the input voltage is within acceptable limits, the reset output pin is de-asserted, allowing the system to power-on normally. Additionally, the power-fail warning output remains asserted while the power-on reset level is below the nominal voltage.

The CAT1641LI-28-G also features internal current and temperature monitoring, which allow the device to alert the system of any overcurrent or overtemperature conditions and protect the system from further damage. The 1.95 V internal supervision voltage also allows users to set a power-on reset level far below the nominal supply voltage, making the device suitable for systems that require enhanced power protection. Finally, the on-chip watchdog timer can be configured to keep a system up and running or reset the system periodically.

Conclusion

The CAT1641LI-28-G from ON Semiconductor is an extremely versatile voltage monitoring IC, featuring a range of features that make it suitable for a variety of applications. It can be used to monitor two power supplies, provide a power-on reset level, issue a power-fail warning, and serve as a low drop-out linear regulator. Furthermore, the device also has internal current and temperature monitoring and an adjustable overvoltage threshold. All these features make the CAT1641LI-28-G an ideal choice for many advanced industrial applications.

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