12V buck regulators support up to 14A auxiliary rails

Article By : EE Times Asia

The ISL850xx sync buck regulators support input voltage of 3.8V to 18V and wide output current range, according to Intersil.

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, the ISL85014, ISL85012, ISL85009, ISL85005A and ISL85005, 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, according to the company.

The ISL850xx sync buck regulators support input voltage of 3.8V to 18V and wide output current range, Intersil said. 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 ISL850xx 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 (BOM) cost.

The ISL85014 is offered in 3.5mm x 3.5mm packages, while the ISL85009 features high side FET RDSon at 17mΩ and low side FET RDSon of 8.5mΩ to 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.

The ISL850xx family of buck regulators can work alongside the ISL68127 and ISL69124 digital multiphase controllers and ISL99227 smart power stages to support networking auxiliary output rails with high efficiency and compact size. They are also well suited for two-stage 12V to 5V/3.3V rails working with Intersil's 5V sync buck regulators such as the 6A ISL8026, dual 3A ISL8033 and 3A ISL80030/31.

The ISL850xx 12V sync buck regulators are available now in 12-lead DFN and 15-lead TQFN packages with pricing from $0.75 to $2.35 in 1,000 quantities.