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  • Magazine Article
  • 18AUTP11_14
Published November 01, 2018 by SAE International in United States
  • English

ROHM's (Kyoto and Santa Clara, Calif.) BD9S series of automotive synchronous secondary buck dc/dc converters have a high reliability and low power consumption in a compact form factor with a temperature range of −40 to +125°C (−40 to 257°F). The products are offered in a leadless package with wettable flanks, making them suitable for use in applications such as radars, cameras and sensors that can be used for assisted driving. Comprised of very compact, high-efficiency automotive-grade power supply ICs, the BD9S series includes an enable function to adjust the start-up time and a PGOOD output indication to improve system functional safety. This broad lineup of products supports output currents from 0.6 to 4.0A. Offered in the “industry-leading” (according to a ROHM September 2018 study) 2 and 3 mm2 (0.003 and 0.004 in2) space-saving packages, they deliver high efficient operation, resulting in a best-in-class power conversion efficiency of 90% (at 3.6-V input/1.8-V output).

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