ROHM has developed the “BD9xxN5 Series” of LDO regulator ICs with 500mA output current, featuring its proprietary ultra-stable control technology “Nano Cap™”. This series comprises 18 products designed for 12V/24V primary power supply applications used in automotive equipment, industrial equipment, and communication infrastructure.
In recent years, electronic devices have demanded higher density in smaller form factors at the same time. To meet this demand and achieve space savings and design flexibility, power supply ICs must be capable of stable operation even with small-capacity capacitors. However, achieving such performance with output capacitors of 1µF or less has been technically difficult.
To address this challenge, ROHM developed the “BD9xxN1 Series” LDO regulator (150mA output current) in 2022, incorporating its proprietary ultra-stable control technology, “Nano Cap™”. This innovation enables stable operation with output capacitors as small as 100nF, earning widespread adoption across numerous applications.
The newly developed BD9xxN5 Series builds on the success of the BD9xxN1 Series by increasing the output current to 500mA – more than three times higher than before – significantly broadening its suitability for applications requiring higher power. In addition, a very low output voltage ripple of approximately 250mV (with load current variation of 1mA to 500mA within 1µs) is achieved with a small output capacitance of just 470 nF (typical). Beyond standard small MLCCs (multi-layer ceramic capacitors) in the range of several µF and large-capacity electrolytic capacitors, it also supports ultra-small MLCCs, such as the 0603M size (0.6mm × 0.3mm), with capacities below 1µF – where stability was previously difficult to achieve. This contributes to space saving as well as greater flexibility in component selection.
Key applications of the BD9xxN5 Series
In the automotive sector, the BD9xxN5 Series powers the powertrain system for fuel injection systems (FI) and tyre pressure monitoring systems (TPMS) and functions as body system power supply for body control modules (BCM) and infotainment system power supplies for clusters ad head-up displays (HUD). Industrial uses cover power supplies for controllers like Programmable Logic Controllers (PLC), Remote Terminal Units (RTU), and industrial gateways, high-precision LDOs for analog loads and sensors measuring temperature, pressure, flow rate, power supplies for monitoring and control panels in disaster prevention systems, access control systems and building automation and as standby power supplies for Human-Machine Interfaces (HMI) and panel equipment. Consumer electronics benefit in power supplies for control boards in refrigerators, dishwashers, air conditioners, power supplies for home appliances like thermostats and doorbells and power supplies for constant power applications in home security and network equipment, etc.
Click here to learn more about the BD933N5FP2-CE2.
