System Simplification Achieved Through Peripheral Component Miniaturization

ROHM has developed the BD9V100MUF-C, a step-down DC/DC converter with integrated MOSFET for automotive systems driven by 48V power supplies such as mild hybrid vehicles, achieving the industry's highest step-down ratio at 2MHz operation (switching) as required for automotive applications.

The BD9V100MUF-C incorporates Nano Pulse Control, an ultra-high-speed pulse control technology realized by concentrating three advanced analog technologies—circuit design, layout, and process—from ROHM. Operating at 2MHz, it enables low voltage output down to 2.5V for high voltage input up to 60V (industry-leading step-down ratio of 1/24).

As a result, while miniaturizing peripheral components, voltage conversion from high to low voltage, which previously required two or more power ICs, can now be configured with a single power IC, enabling simultaneous miniaturization of applications and simplification of systems.

The new product BD9V100MUF-C incorporates Nano Pulse Control, an ultra-high-speed pulse control technology realized through ultra-high-speed pulse control circuitry and high breakdown voltage BiCDMOS process. By achieving a world-minimum switching on-time of 9ns in power ICs, the highest step-down ratio has been realized.

In this manner, along with constant 2MHz operation that does not affect the AM radio band (1.84MHz Max.), low voltage output of 5V and 3.3V (minimum 2.5V) for ECU operation is realized for high voltage input up to 60V. Voltage conversion from high to low voltage in 48V power supply systems for mild hybrid vehicles can be configured with "a single power IC." Accordingly, the number of components can be reduced, enabling miniaturization of applications.