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Date: 06-03-13

48 Volts i/p buck type DC/DC converters for industrial and automotive apps

Texas Instruments has introduced three new 48-V synchronous buck regulators with integrated high-side and low-side MOSFETs for single- and multi-output power supplies. The 650-mA LM25017, 300-mA LM25018 and 100-mA LM25019 Fly-Buck converters feature constant on-time (COT) control architecture that reduces board space by up to 40 percent when compared with traditional designs that require multiple DC-DC converters, claims TI. These constant on-time (COT) control architecture based step down regulators are designed for industrial and automotive applications.

Suitable for non-isolated voltage regulators and multi-output solutions operating from high input voltage of 48 V, these power ICs are packed in pin-compatible LLP and PSOP packages. Each Fly-Buck converter can be configured to provide positive and negative voltage rails, or isolated multiple outputs with good cross-regulation.

The Fly-Buck converters are pin-to-pin compatible with TI's 100-V, 600-mA LM5017, 300-mA LM5018 and 100-mA LM5019 wide input voltage range regulator family.

Availability, packaging and pricing: The new Fly-Buck converters are available in volume now from TI and its authorized distributors. Offered in thermally-enhanced 8-pin LLP and PSOP packages, the LM25017 is priced at US$1.25, the LM25018 is US$1.12 and the LM25018 is US$1.00 in 1,000-unit quantities. AECQ-100 qualified versions will be available in May 2013.

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