Exar buck controller with 18V and 30V input voltage support

Exar recently announced a non-synchronous constant on-time buck controller for the 5 Amps load, the XRP6124. As the latest addition to the Exar step-down controller family, the XRP6124 is available in two versions: 18V and 30V for 12V and 24V input applications.

“The XRP6124's unique architecture improves performance and greatly improves linearity regulation. On the other hand, it exceeds the traditional constant on-time controller topology by enabling direct use of cost-effective ceramic capacitors.” Exar Eric Pittana, director of marketing for the company’s power product line, said. "The XRP6124 stands out from many products and becomes the first product derived from this new architecture. It achieves higher performance while maintaining a very simple architecture."

The XRP6124, an unsynchronized 500ns constant on-time controller, achieves up to 92% efficiency in a compact package, operates at quasi-constant switching frequencies up to 1MHz, and supports up to 30V input voltage and low Adjustable output voltage up to 1.2V. Its proprietary control structure provides extremely fast linearity regulation and load transient response without external compensation circuitry and allows the use of cost-effective ceramic capacitors. The XRP6124's power supply design flexibility has been further enhanced through its precision-enable function and built-in soft-start. At the same time, output short-circuit protection also provides fail-safe operation for the XRP6124.

Power management with high reliability and accuracy is a key element of any technical system. Exar has a range of high-performance and industry-accepted power management solutions, including handheld devices and lighting control, power conversion, and standard linear devices.

Two versions of the XRP6124, the XRP6124 and XRP6124HV support input voltages up to 18V and 30V, respectively. Both versions are available in volume quantities, are RoHS compliant and come in a "green" lead-free 5-pin SOT 23 package.

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