The BUxxJA3DG-C family of LDO regulator ICs from ROHM are designed for use in automobiles (BU12JA3DG-C, BU15JA3DG-C, BU18JA3DG-C, BU25JA3DG-C, BU30JA3DG-C, BU33JA3DG-C). The gadgets are designed for use with automobile applications, such as the more potent and compact ADAS sensors. The new BUxxJA3DG-C series, thanks to its small size and compatibility with common output voltages, meets the fundamental requirements for LDOs used in secondary power supply of automotive systems. Although they come in a compact package (2.9 mm x 2.8 mm), they can sustain output currents of up to 300 mA and have an input voltage range of 1.7 mm to 6 mm. The LDO can generate low output voltages in 1.8V power supply systems with greater efficiency because to the low input supply voltage. Additionally, compared to comparable 3.3V low-noise LDO regulators, the output voltage noise is reduced to about 55Vrms, a reduction of nearly 40%. In ADAS applications, its series can offer a quieter power supply and higher miniaturisation and performance.
The series complies with fundamental requirements such as small size, 125C operating support, qualification under the AEC-Q100 automotive reliability standard, and output voltages required for automotive secondary LDO regulators. Additionally, a tiny form factor is used to supply output currents up to 300mA from a wide input voltage range of 1.7V to 6V. To use in 1.8V power supply systems, the lowest output voltage, BU12JA3DG-C, offers consistent operation even at 1.7V input/300mA output. Furthermore, the impact on tiny electrical signals is lessened thanks to a 40% reduction in output noise compared to conventional products (e.g., 55 Vrms at the BU33JA3DG-C). Since noise is a problem, this makes them ideal for power supply in small, high-performance automotive applications. ADAS, sensors, cameras, radar, and automotive infotainment systems, including clusters and HUDs, are common application examples.
