BD9S series - ultra-compact automotive buck DC/DC converters
BD9S series of automotive secondary buck DC/DC converters for assisted driving systems, which are requiring high reliability and low power consumption in a compact form factor, such as radars, cameras, and sensors used in ADAS.
- Enable control and Output voltage indicator to improve system reliability
These IC’s includes an enable function to adjust the startup time and a built-in output (Power Good function) indicating correct output voltage.
- Class-leading miniaturization and efficiency
For automotive-grade secondary buck DC/DC converters requiring greater miniaturization and high performance operation, a class-leading 2mm² size with full synchronous operation is offered, while the optimized design ensures the best-in-class* power conversion efficiency among functionally equivalent products (90% at 3.6V input/1.8V output).
The current mode control loop with fixed 2.2MHz frequency fluctuations makes it possible to reduce the size of peripheral components and eliminate interference from the AM radio band. A dedicated light load mode improves efficiency in the lower current load region. The result is higher miniaturization and power savings in safe driving support modules.
- Broad lineup includes output currents up to 4.0A
ROHM offers ultra-compact models in output currents ranging from 0.6A to 4.0A. This contributes to model optimization and supports sudden system changes
|Part No.||Input Voltage Range||Output Voltage||Max. Output Current||Output Voltage Precision||Operating Frequency||Operating Temperature||Package|
|BD9S400MUF‑C||2.7V to 5.5V||0.8 to Vin*0.8||4.0A||±1.5%||2.2MHz
|-40oC to 125oC||VQFN16FV3030
(3.0 x 3.0 x 1.0mm)
|BD9S100NUX‑C||0.8 to Vin||1.0A||VSON008X2020
(2.0 x 2.0 x 0.6mm)
**BD9S110NUX-C and BD9S111NUX-C are under development
- ADAS sensors, cameras, and radars
- Drive recorders
- Other automotive applications requiring high efficiency, superior reliability, and greater compactness
Have a question? Contact us