ROHM Semiconductor has recently announced the development of system power supplies optimized for high-performance microcontrollers in a variety of automotive systems, from electronic power steering to fuel injection, including HEVs and EVs. The newly developed BD39001EKV-C utilizes a proprietary boost-buck switching method that ensures stable voltage supply, even when the battery voltage drops during start-stop operation, while improving power conversion efficiency by up to 5% vs. conventional products. And in response to the continued standardization and advancements in the automotive industry a startup sequence setting function is included that can adapt to a variety of MCU specifications and requirements.
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With the continuing trend towards platform standardization in the automotive industry comes a push to promote the use of common parts worldwide. This is expected to increase demand for versatile products that can suit a variety of requirements and support microcontrollers of all types – as well as high-performance devices and solutions optimized for customized dedicated power supplies and specific applications.
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In response, ROHM quickly developed a versatile, standardized power supply IC capable of providing stable voltage during stop-stop operation. The BD39001EKV-C utilizes a leading-edge 0.35um BiCDMOS power process and takes advantage of ROHM’s analog design expertise to achieve a wide input voltage range from 4V to an absolute maximum of 40V.
And to ensure compatibility with start-stop systems, ROHM adopted a new boost-buck automatic switching control method that provides stable voltage to the MCU, even when the battery voltage fluctuates below 5V, while increasing power conversion efficiency by 5%.
Besides providing continuous, stable power supply for I/O (5V LDO) and the MCU core (3.3V DC/DC) based on a variable primary power supply, a number of surveillance functions are built in, including a watchdog timer that monitors MCU operation, improving reliability. The products also feature a compact form factor that contributes to end-product miniaturization. These devices are sampling now with production scheduled for December and cost $5.26 each.
source: http://www.powerpulse.net/story.php?storyID=30946
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