ROHM’s New Compact 300mA Automotive-Grade LDO Regulators for High Performance ADAS Sensors

ROHM developed automotive-grade LDO regulator ICs: the BUxxJA3DG-C series (BU12JA3DG-C, BU15JA3DG-C, BU18JA3DG-C, BU25JA3DG-C, BU30JA3DG-C, BU33JA3DG-C).

The devices are designed for automotive applications such as sensors for ADAS (Advanced Driver Assistance Systems) which have become smaller and more powerful.

In recent years, safety requirements in the automotive sector have increased as technological innovations in accident prevention and autonomous driving continue to progress. In line with this, sensors and cameras installed in ADAS are becoming increasingly sophisticated, necessitating power supply ICs that deliver larger currents in a smaller package size.

In the past years, ROHM has already offered compact, energy-saving solutions utilizing an extensive lineup of DC-DC converters and LDO regulators for a wide range of automotive applications, including ADAS and ECUs.

The new BUxxJA3DG-C series meets the basic requirements for LDOs used in the secondary power supplies of automotive systems (i.e. compact size, compatibility with standard output voltages). On top of that, despite their small package size (2.9mm × 2.8mm), they support output currents of up to 300mA while covering an input voltage range from 1.7V to 6V. Such low input supply voltage enables the use of the LDO in 1.8V power supply systems to provide low output voltages at a higher efficiency. Furthermore, the output voltage noise is reduced to just 55μVrms which is about 40% lower than similar 3.3V low-noise LDO regulators. As a result, its series is able to provide a more quiet power supply along with greater miniaturization and performance in ADAS applications.

Going forward, ROHM will continue to support the evolution of vehicles by developing power supply ICs that contribute to greater power savings and miniaturization in automotive applications.