/ Aswen Tong/August 30, 2022 Guangzhou -- Using QuiCur technology,
ROHM(based in Kyoto, Japan), the world's leading semiconductor manufacturer, is targeting increasingly complex on-board applications such as ADAS(Advanced Driver assistance systems) and infotainment systems, including on-board sensors and cameras. Developed a step-down type DC-DC converter IC*1 "BD9S402MUF-C".
In recent years, in the automotive field, with the innovation of accident prevention and autonomous driving technology, the requirements for safety performance are becoming higher and higher. At the same time, the increasing complexity of the SOCs and microcontrollers that control ADAS systems, including on-board sensors and cameras (increasing current for processing power and decreasing voltage for power savings) requires that the power ics that feed them operate more stably under harsh conditions where load current fluctuates. In order to meet the characteristic requirements of these power ics, ROHM established the ultra high speed Pulse Control technology "Nano Pulse Control" for low voltage output in 2017, and the high speed load response technology "QuiCur" for stable operation in 2021. By incorporating QuiCur technology into ROHM's new products for the first time, the company has achieved industry-leading ultra-stable operation in an on-board secondary side DC-DC converter IC of comparable performance.
The new products meet the requirements of the increasingly improved performance of the System on a Chip (SoC) and the secondary side of the microcontroller *2 power applications of small size, 4A output current, switching frequency more than 2MHz and 0.6V low-voltage output. Moreover, equipped with ROHM's own high-speed load response *3 technology "QuiCur", compared with ordinary products with the same function, the output voltage fluctuation is reduced by 25%, only 30mV, achieving ultra-stable operation (test conditions: Output voltage 1.2V, output capacitance capacity 44µF, load current fluctuation 0 to 2A/2 µsec), making it ideal for high-end ADAS applications where power conditions are harsh (stable operation within ±5% under low voltage output conditions).
In addition, as a new function, there is also a built-in response performance selection function, which can be easily switched between "voltage fluctuation priority (industry ultra-stable operation)" and "capacitor reduction priority (22μF small capacity stable operation)" through the pin setting. The expected stable operation can be easily achieved not only in preliminary design, but also in case of specification or model changes, thus contributing to a significant reduction in power circuit design time.
Samples of the new product have been sold since June 2022 (sample price is 500 yen per piece, excluding tax), and it is planned to temporarily put into mass production with a monthly production of 100,000 units from April 2023. In addition, it has also started to sell online, from Ameya360, Sekorm, Oneyac, RightIC and other e-commerce platforms.
