In recent years, safety requirements in the automotive sector have increased as technological innovations in accident prevention and autonomous driving have continued to advance. Accordingly, the sensors and cameras installed in ADAS systems are becoming increasingly sophisticated, which in turn demands integrated power circuits that can deliver higher currents in a smaller package size.
In recent years, ROHM has already offered compact energy-saving solutions using a wide range 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 of LDOs used in automotive secondary power supplies (i.e., compact size and compatibility with standard output voltages). Furthermore, despite their small size (2.9 mm × 2.8 mm), they support output currents up to 300 mA and cover an input voltage range of 1.7 V to 6 V. This low input voltage allows the LDO to be used in 1.8 V power supply systems to provide low output voltages with increased efficiency. Moreover, the output voltage noise is reduced to only 55 µVrms, a 40% reduction compared to similar low-noise 3.3 V LDO regulators. As a result, this series is capable of providing a quieter power supply along with greater miniaturization and performance in ADAS applications.
And in the future, ROHM will continue to support the evolution of vehicles by developing integrated power circuits that contribute to greater energy savings and miniaturization in automotive applications.
New product range
The BUxxJA3DG-C series meets basic requirements, including a compact size, support for operation at 125°C and qualification according to the AEC-Q100 automotive reliability standard, as well as the output voltages required for secondary LDO regulators in automotive applications.
At the same time, output currents of up to 300 mA are provided from a wide input voltage range of 1.7 V to 6.0 V in a small form factor. This is therefore the lowest output voltage available. The BU12JA3DG-C thus ensures stable operation even at 1.7 V input/300 mA output, enabling its use in 1.8 V power systems. Furthermore, output noise is reduced by 40% compared to standard products (e.g., 55 µVrms in the BU33JA3DG-C), minimizing the impact on minute electrical signals. This makes them ideal for power supplies in compact, high-performance automotive applications where noise is a concern.
Application examples
ADAS, sensors, cameras and radars.
Infotainment systems in vehicles including instrument clusters and head-up displays (HUDs).
It allows its use in a wide range of applications and fields, especially in secondary power supplies for noise-sensitive automotive applications.
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