Santa Clara, Calif. -- ROHM Semiconductor has developed system power supplies optimized for high-performance microcontrollers (MCUs) in a variety of automotive systems, such as electronic power steering, fuel injection, and advanced driver assist systems (ADAS) including hybrid electric vehicles (HEVs) and electric vehicles (EVs).
To ensure compatibility with start-stop systems, the BD39001EKV-C uses a proprietary boost-buck automatic switching control method that ensures stable voltage supply to the MCU, even when the battery voltage fluctuates below 5 V during start–stop operation, while improving power conversion efficiency by up to five percent versus conventional products, said ROHM. The power management IC also includes a startup sequence setting function that can adapt to a variety of microcontroller specifications and requirements, which is key for standardization in the automotive industry.
The standardized power supply IC is capable of providing stable voltage during start-stop operation - adopted to minimize fuel consumption - to prevent MCU malfunctions due to battery voltage fluctuations caused by cranking when the engine is started again. The BD39001EKV-C leverages a leading-edge 0.35um BiCDMOS power process and ROHM's analog design expertise to achieve a wide input voltage range from 4 V to an absolute maximum of 40 V.
The power supply IC provides continuous, stable power supply for I/O (5V LDO) and a MCU core (3.3V DC/DC) based on a variable primary power supply. It also has several built-in surveillance functions, including a watchdog timer that monitors MCU operation to improve reliability.
Availability: Samples are available now, and OEM quantities in Dec. 2014.
Pricing: $5.26 each