Power

Regulators simplify design in industrial systems

21st April 2015
Siobhan O'Gorman
0

 A line of 40V synchronous step-down regulators has been introduced by Exar. The XR76203, the XR76205 and the XR76208, which expand the company’s PowerBlox family, support 3, 5 and 8A POL supplies, respectively.

The devices are designed to provide a wide 5-40V input voltage range while providing outstanding transient response and output accuracy over the entire voltage range using Exar's proprietary emulated current mode COT control loop.

With a proprietary emulated current mode COT control scheme, the XR76203, the XR76205 and the XR76208 provide extremely fast line and load transient response using ceramic output capacitors. The regulators require no loop compensation, simplifying circuit implementation and reducing the overall component count. The control loop also provides 0.07% load and 0.15% line regulation and maintains constant operating frequency. A selectable power saving mode allows the user to operate in discontinuous mode at light current loads, significantly increasing the converter efficiency. A host of protection features, including overcurrent, over-temperature, short-circuit and UVLO, help achieve safe operation under abnormal operating conditions.

"The line of 40V PowerBlox regulators follows the recent releases of the 40V XR75100 synchronous controller and the XR77129 universal PMIC and shows Exar’s commitment to its industrial customer base," said Jon Cronk, Director of Marketing, Power Products, Exar. "Exar's proprietary emulated current mode architecture sets it apart from competition in terms of load and line regulation and transient response. The common 5x5mm package size allows designers to easily scale across a wide range of power levels."

The regulators are available in RoHS compliant, green/halogen free, space-saving 30-pin 5x5mm QFN packages. The XR76203, the XR76205 and the XR76208 are priced at $1.85, $2.30 and $2.90, respectively, and sold in 1,000-piece quantities.

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