CAT661EVA-GT3

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CAT661EVA-GT3 Application Field and Working Principle

The CAT661EVA-GT3 (CAT661) is a DC-DC switching regulator that is capable of providing high efficiency power conversion while maintaining an affordability and functionality advantage. It is a study in product development where all of the features essential in enabling the CAT661 to not just be a low-cost Regulator, but also a reliable and efficient one.

The CAT661 is a high-efficiency, cost-effective integrated power-conversion solution that enables quick and easy design of a wide variety of both AC and DC powered electronic products. With a rated output current (IU) of up to 4A, wide input and output voltage ranges, and integrated over-voltage and over-current protection, the CAT661 provides designers with a high degree of flexibility in the design and implementation of their products.

The CAT661 is a non-isolated synchronous buck regulator that provides power conversion efficiency up to 96%, output voltage accuracy of ±2.5%, and an output ripple of less than 90mVrms. In order to maintain these specifications, the CAT661 utilizes a Schottky-based output stage with a wide dynamic input voltage range. Additionally, the CAT661 contains two separate synchronous level gates in order to reduce the output voltage ripple.

In addition to the main features, the CAT661 also features a wide operating temperature range of -40ºC to +125ºC, protection against over-voltage, over-temperature, short-circuit, and output short-circuit conditions. A built-in Soft-start function prevents large in-rush currents when the regulator turns ON, while an adjustable frequency allows for increased efficiency over the full load and voltage range. With its integrated low-resistance current-sense resistor, the CAT661 offers the designer an easy-to-implement solution for current limiting.

The CAT661 is an integrated, non­-isolated, low-cost DC-DC switching regulator solution for a wide variety of applications including computer peripherals, automotive electronics, and industrial controls. This state-of-the-art switching regulator provides the designer a high degree of flexibility, reliability, and efficiency as well as excellent EMC performance.

In conclusion, the CAT661 is an ideal solution for designers seeking a cost-effective and reliable DC-DC switching regulator that supports a wide range of applications. The integrated protection features along with its wide input and output voltage ranges, high efficiency, and low noise operation make it the perfect solution for many applications. With its aggressive price point, the CAT661 provides an excellent value proposition when compared to other products in its class.

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