Power supply is suitable for idling stop systems

The automotive sector is becoming both more standardised and advanced. Increasing the demand for versatile devices that are suitable for a wide range of MCUs, there is a continuing trend towards platform standardisation. To address this standardisation, the BD39001EKV-C features a startup sequence setting function which can adapt to a variety of MCU requirements. 

To minimise fuel consumption, vehicles are being developed with idling stop systems that stop the engine during idling to prevent waste. However, cranking after the engine starts up again can cause battery voltage fluctuations and MCU malfunctions. Therefore, these systems require countermeasures. The power supply's boost-buck automatic switching control method addresses this advancement by providing stable voltage of 5V to the MCU, even when the battery voltage fluctuates below 5V. This method also increases power conversion efficiency by 5%.

Utilising 0.35µm BiCDMOS power processes, the device achieves a breakdown voltage of 40V with an ultra-low drive voltage of 4V, providing a wide input voltage range.

The BD39001EKV-C is offered with a number of surveillance functions, including a window watchdog timer that monitors MCU operation, improving reliability. The device is suitable for MCUs in automotive systems ranging from electronic power steering to fuel injection. The power supply is sampling now and will be available from December 2014.