Highly integrated synchronous buck regulators offer high efficiency and reliable performance

Intersil has introduced five synchronous buck regulators that step-down 12V rails to point-of load inputs as low as 0.6V for MCUs, FPGAs, memory and peripheral I/Os. The newest members of the ISL850xx family consist of the ISL85014, ISL85012, ISL85009, ISL85005A and ISL85005 buck regulators. They deliver 14A, 12A, 9A and 5A of continuous output current, respectively, to industrial computers and programmable logic controllers as well as telecom, test and measurement, server and storage networking equipment. The sync buck regulators support input voltage of 3.8V to 18V and wide output current range, offering designers a complete portfolio of devices with high efficiency and reliable performance. The pin compatible regulators integrate very low RDSon high side and low side MOSFETs that reduce external component count and power loss to extend product life. Both FETs also provide current limit and reverse current limit to boost reliability and protect the system during an overcurrent event. The high efficiency devices enable lower die temperatures, allowing systems to operate without cooling fans or heatsinks. Their internal compensation eliminates additional external components, which reduce design complexity and bill of materials cost. The device is offered in one of the industry’s smallest 14A packages at 3.5mm x 3.5mm, offering a compact footprint to free up valuable board space. It is one of the industry’s most power efficient 9A sync buck regulators, offering high side FET RDSon at 17mOhm and low side FET RDSon of 8.5mOhm to dramatically reduce die temperatures for applications without cooling systems. The pin-compatible ISL85014, ISL85012 and ISL85009 address high load current applications, while the 5A ISL85005A and ISL85005 buck switching regulators are pin-compatible with the previously released 3A ISL85003A and ISL85003 devices. "Design complexity is growing, prompting power supply designers to look for highly integrated, feature-rich buck regulators that not only offer small size, but deliver high efficiency, fast transient response and ease of use," said Mark Downing, senior vice president of Infrastructure and Industrial Power products at Intersil. "Our family of pin-compatible 3A to 14A synchronous buck regulators gives customers all the features they need in a small, layout friendly footprint."