CAT1022WI-28-GT3

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The CAT1022WI-28-GT3 device is a programmable reset circuitry which is used in commercial and industrial applications. The device is produced by C&D Technologies and is a member of the Power Management IC (PMIC) family. It is specifically designed for supervised power-on reset (SPOR) applications such as TV/display backlight module, smart home appliance applications, industrial instrumentation and robotics, or any application where power-on reset or reset-related control is required.

The CAT1022WI-28-GT3 provides several functions for power-on reset, including a programmable reset time, power-on reset delay, which is adjustable by trimming, or via external components. Other features include an open drain indicator output, current limit function to prevent inrush current from large capacitors, and an input voltage monitor function capable of monitoring up to three different voltages. This device is optimized for applications requiring a reset voltage as low as 0.8V.

The working principle of the CAT1022WI-28-GT3 is as follows: the reset circuit includes a voltage divider that provides a reference voltage proportional to the input voltage. The reference voltage is compared to an internal voltage comparator, when its voltage drops below the internal reference voltage of the device, the reset output pin toggles low which generates a reset pulse. During normal operation, the POWER ON Reset Delay pin is held low, causing the reset to remain active until the voltage recovers and is once again above the reference voltage before the output pin becomes high and resets the system.

The CAT1022WI-28-GT3 also includes an open drain indicator output that allows the external circuit to monitor its reset status. The pin is pulled low when the power-on reset is active and high when it is not. The open drain output can be used as a reference signal to activate external components or as an indicator to other components when a power-on sequence is complete. The device also features a current limit function which protects against inrush current from large capacitors.

The CAT1022WI-28-GT3 offers an advanced level of reset circuitry for a wide range of commercial and industrial applications. It provides a robust, high-speed power-on reset with adjustable delay times, an open drain indicator output, current limit protection, and an input voltage monitor for up to three different voltages. This makes it an ideal solution for high-reliability, demanding environments where power-on reset or reset-related control is required.

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