ROHM has launched the buck DC/DC converter ICs with built-in MOSFET (Switching regulator), BD9S402MUF-C, for automotive applications.
The new BD9S402MUF-C supports output voltages down to 0.6V and 4A output current at switching frequencies higher than 2MHz in a compact size demanded by increasingly sophisticated secondary power supply applications for high-performance MCUs and SoCs.
What’s more, it is incorporating proprietary QuiCur™ high-speed load response technology and enables stable operation at an industry-leading 30mV (measurement conditions: 5V input voltage, 1.2V output voltage, 44μF output capacitance, load current variation 0 to 2A/2μs).
This translates to a 25% reduction in output voltage fluctuation over class-leading standard products with equivalent functionality, making it ideal for use in the latest ADAS with severe power supply conditions requiring stable operation within 5% even with low voltage output.
The BD9S402MUF-C is also equipped with a new load response performance selection function that allows users to easily switch priority between ‘voltage fluctuation’ (for industry-leading stable operation), and ‘capacitance reduction’ (to ensure stable operation at 22μF) via terminal setting.
The result is that users can significantly reduce the resources required for power circuit design, as stable operation can be easily achieved not only at the initial design but also during specification or model changes.
Going forward, ROHM plans on expanding its lineup of power supply ICs incorporating QuiCur™ to support a wider range of applications.
QuiCur™ is named after ROHM’s original ‘Quick Current’ high-speed load response circuit that maximizes load transient response characteristics without causing instability in the feedback circuits of power supply ICs.
The BD9S402MUF-C, in addition to meeting the basic requirements of secondary DC/DC converter ICs in ADAS for 2MHz or higher operation and 4A output current, ROHM’s unique Nano Pulse Control™ ultra-high-speed pulse control technology delivers next-generation low voltage output down to 0.6V – much lower than the typical 1.0V voltage output required by current SoCs and MCUs.
At the same time, equipped QuiCur™ high-speed load response technology achieves extremely stable operation.
The BD9S402MUF-C is also equipped with a load response performance selection function that leverages the characteristics of QuiCur™ technology, allowing users to easily switch priority between ‘voltage fluctuation’ (for industry-leading stable operation) and ‘capacitance reduction’ (to ensure stable operation at 22μF) by setting High/Low of the GAIN pin.