ROHM’s New Automotive LDO Regulators: Stable Operation at Nanoscale Output

ROHM introduces new automotive LDO regulator ICs with stable operation at nanoscale output capacitance. The BD9xxN1 series (BD950N1G-C, BD933N1G-C, BD900N1G-C, BD950N1WG-C, BD933N1WG-C, BD900N1WG-C) is optimized for primary (direct connection to 12V) power supplies in a wide range of applications, including powertrain, body, ADAS, and car infotainment.

In recent years, the continuing digitization of all types of equipment has been increasing the number of electronic components, which in turn has been driving the demand to reduce the number of capacitors used for circuit stabilization to shrink both the size and the bill of material (BOM). This requires power supply ICs in power supply circuits that can achieve stable operation with small sized capacitors, but until now it had been difficult to achieve stable operation in applications with output capacitances of 1μF or less.

To meet these needs, ROHM developed the Nano Cap™ ultra-stable control technology for power supply ICs in 2020. Leveraging this technology enables ROHM designers to develop LDO regulators that ensure stable operation even at ultra-small nanoscale output capacitances. This enables the support of an output capacitance of 100nF – less than 1/10 of the value of standard products (more info).