High power COT switching controller delivers 1% output accuracy

Exar Corporation has introduced a new high-power switching controller in its line of DC-DC power conversion products. The XRP6141 Synchronous Step Down Controller supports point-of-load (POL) supplies up to 35A and is designed to achieve excellent transient response and output accuracy using Exar”s proprietary emulated current mode Constant On-Time (COT) control loop.

This device delivers core voltage rails for ASICs, FPGAs, DSPs and Network Processors in communications, networking and industrial markets.

The XRP6141 is specified with a wide input voltage range of 4.5V to 22V and delivers an adjustable output voltage from 0.6V to 18V. With its 0.1% line regulation across the entire input voltage range and 1% output accuracy over full temperature range, the XRP6141 is able to provide increased headroom to engineers for easier design implementations.

Exar”s COT control loop enables operation with ceramic output capacitors, eliminating loop compensation, which simplifies system design and reduces overall component count. In addition, the XRP6141 offers a host of supervisory and protection features for proper sequencing, safe operation under abnormal operating conditions and light load operation.

“The XRP6141 has been developed in response to customer demands, particularly in telecommunications systems but also for enterprise computing, industrial and medical markets, and many other applications using high power FPGAs and DSPs,” said James Lougheed, vice president, power management and AMS products, Exar. “The adoption of COT architectures in these segments provides the benefit of improved regulator transient response without the need for additional output capacitance. Hardware engineers responsible for board level power systems will appreciate Exar”s unique implementation, which makes the XRP6141 easy to design with and keeps the component count low.”

www.exar.com

 

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