LDO regulator ICs reduce noise by 40%

Rohm Semiconductor has introduced the BUxxJA3DG-C series of automotive-grade LDO regulator ICs. Based on their simple circuit configuration and low noise, they target automotive applications such as ADAS sensors, cameras and radar, and vehicle infotainment systems.

(Source: Rohm Semiconductor)

Automotive safety requirements are increasingly demanding power supply ICs that deliver larger currents in a smaller package size. The LDO regulator ICs meet basic requirements for automotive secondary power supply LDOs including compact size and compatibility with standard output voltage.

Although compact (2.9 × 2.8 mm), they support output currents up to 300 mA and cover an input voltage range from 1.7 V to 6 V. The low input supply voltage enables the LDOs use in 1.8-V power supply systems to provide low output voltages at a higher efficiency

The series provides a low-noise power supply, as output voltage noise is reduced to 55 μVrms, approximately 40% lower than competing 3.3-V LDO regulators, according to Rohm. The BU12JA3DG-C offers the lowest output voltage for operation stability even at 1.7-V input/300-mA output, enabling its use in 1.8-V power supply systems. Here too, output noise is reduced by 40% over general products, reducing the effect on electrical signals, said the company.

(Source: Rohm Semiconductor)

The BUxxJA3DG-C series meets basic requirements, including compact size, support for 125°C operation, qualification under the AEC-Q100 automotive reliability standard, as well as the output voltages required for automotive secondary LDO regulators.

Priced at $1.00/unit for samples, the BU12JA3DG-CTR, BU18JA3DG-CTR, BU25JA3DG-CTR, BU33JA3DG-CTR are available for purchase through online distributors Digi-Key, Mouser, and Farnell, while the BU15JA3DG and BU30JA3DG-C are under development.