Exar Releases Scalable High Voltage, High Current Step-down PowerBlox Converter
Exar Corp. unveiled the XRP7665, a new synchronous Pulse Width Modulation (PWM) step-down converter with a maximum load current of 3A and operating input voltage of up to 18V. This device is the latest addition to Exar’s PowerBlox family of high-voltage, high-current step-down regulators.
Optimized for a 12V input voltage rail, yet equally capable of operating from the popular 5V rail, the XRP7665 addresses the needs for smaller footprint and substantial savings in cost sensitive applications. These include audio-video equipment such as set-top boxes, telecom, computing peripherals and more generally distributed point-of-load conversions.
"The XRP7665 offers system architects a scalable solution to upgrade to a 3A capable point of load from our popular 2A XRP7664 solution," said Eric Pittana, Director of Marketing, Power Product Line. "The XRP7665 complements our existing 2 to 12A converters from Exar’s PowerBlox family and is part of Exar’s continuous effort to provide designers with higher performing and cost effective solutions for dc to dc power conversions."
Reaching up to 93% efficiency in a compact "green" SOIC package, the XRP7665 operates at a fixed 340 kHz switching frequency allowing for small external components. The output voltage can be adjusted down to 0.925V, with 2.7% accuracy, via two external resistors, which can be achieved from any single input voltage from 4.75 to 18V. Design flexibility of any point-of-load supply with the XRP7665 is further enhanced with the availability of a dedicated enable function and programmable soft start. Built-in current limit, output over voltage and thermal shutdown protection provide the XRP7665 with fail-safe operations.
The XRP7665 is available now in volume quantities and offered in a RoHS compliant, "green" halogen free Exposed Pad 8-pin SOIC package. Pricing starts at $0.39 for 1K units.
