ROHM Co., Ltd. has developed 45V-rated 500mA-output primary LDO regulators: BD9xxM5-C. These devices are suitable for supplying power to automotive electronic components such as ECUs that operate from vehicle batteries.
BD9xxM5-C: https://www.rohm.com/products/power-management/linear-regulators/single-output-ldo-regulators?page=1&PS_ProductSeries=BD9xxM5%20series&PS_CommonStandard=AEC-Q100%20(Automotive%20Grade)#parametricSearch
Logo:
https://cdn.kyodonewsprwire.jp/prwfile/release/M106254/202403087752/_prw_PI4fl_KmMw5Jg7.jpg 
In recent years, the number of onboard power supply systems and functions continues to grow as electrification in the automotive industry progresses. This increases demand for primary LDOs that can directly step down the battery voltage to MCUs and other components used in ECUs. However, the energy supplied by the vehicle's lead-acid battery is often subject to sudden voltage fluctuations, which primary LDOs are required to provide with excellent line-transient response in these conditions.
At the same time, ECUs and other downstream devices often experience load current variations during operation, which also demand excellent load-transient response characteristics. A high-frequency response is essential for fast output voltage recovery, but it has been difficult to provide sufficient phase margin at the same time to ensure stable operation. In response, ROHM developed a novel solution that addresses these challenges.
The BD9xxM5-C incorporates original QuiCur(TM) high-speed load response technology that delivers excellent response characteristics to load current fluctuations. For example, the LDO can maintain output to within 100mV of set voltage even as the load changes between 0 and 500mA in 1-microsecond (rise-time/fall-time). Furthermore, low 9.5-microampere (typ.) current consumption contributes to lower power consumption in automotive applications. These new products will be available in four packages, ranging from the compact HTSOP-J8 to the high heat dissipation TO252 and HRP5 types. This allows users to select the most suitable package for each use case
This allows users to select the most suitable package for each use case
ROHM will continue to improve reliability while reducing power consumption in automotive applications by developing products utilizing its strengths in analog and other technologies.
Image:
https://cdn.kyodonewsprwire.jp/prwfile/release/M106254/202403087752/_prw_PI1fl_0SgNUwq9.jpg 
Release: https://www.rohm.com/news-detail?news-title=2024-03-14_news_ldo&defaultGroupId=false 
Performance comparison:
https://cdn.kyodonewsprwire.jp/prwfile/release/M106254/202403087752/_prw_PI2fl_5LSEbl7Q.jpg 
Response performance comparison:
https://cdn.kyodonewsprwire.jp/prwfile/release/M106254/202403087752/_prw_PI3fl_bJ14w0iv.jpg 
QuiCur(TM) technology: https://www.rohm.com/news-detail?news-title=rohm-establishes-quicur-that-maximizes-the-response-performance-of-power-supply-ics&defaultGroupId=false 
*QuiCur(TM) is a trademark or registered trademark of ROHM Co., Ltd.
About ROHM:
https://kyodonewsprwire.jp/attach/202403087752-O1-7xfro8hX.pdf 
Official Website: https://www.rohm.com/ 
SOURCE ROHM Co., Ltd.
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