ROHM Introduces DC-DC Buck Converters for Industrial Automation & 5G Base Stations


ROHM Semiconductor has announced two new buck DC-DC converter ICs with built-in MOSFET – the BD9G500EFJ-LA and BD9F500QUZ – ideal for applications supporting high voltages and currents in factory automation equipment (eg, PLCs/inverters and 5G base stations that handle high power).

Recent years have seen evolving markets of battery-driven applications and advanced industrial equipment, such as 5G base stations and factory automation systems equipped with new functions utilizing AI and IoT. This demands power supply ICs that are not only compact and operate at high efficiency, but that also deliver large currents for operating multiple functions that can withstand high voltages to prevent damage from sudden surges (ie, due to lighting).

The BD9G500EFJ-LA and BD9F500QUZ are non-isolated DC-DC converter ICs developed by utilizing proprietary analog design technology based on high-voltage BiCDMOS power processes to provide the power supply functionality required by increasingly sophisticated industrial equipment.

In addition to a best-in-class 80 V withstand voltage for 48 V power supply systems, the BD9G500EFJ-LA with built-in MOSFET delivers the largest output current in its class (5 A), contributing to higher reliability and functionality in charging and 5G base stations that handle high power. At the same time, the BD9F500QUZ with built-in Nano Pulse Control technology achieving a high step-down ratio provides 39 V withstand voltage and 5A output current in a compact, low-profile package (3.0 × 3.0 × 0.4 mm).

Moreover, the product features overcurrent protection, as SEL1/SEL2 pins can be selected. These features are ideal for 24 V power supply systems – enabling support for higher functionality and greater miniaturization in a wide range of advanced industrial equipment (ie, factory automation).

Key features of BD9G500EFJ-LA:

  • Withstand Voltage (max): 80 V
  • Input Voltage Range: 7 to 76 V
  • Output Voltage Range: 1 to 0.97 × VIN V
  • Output Current (max): 5 A
  • Switching Frequency: 0.1 to 0.65 MHz
  • Operating Temperature Range : -40 to +125 °C
  • Package: HTSOP-J8, 4.9 × 6.0 × 1.0 mm

Key features of BD9F500QUZ:

  • Withstand Voltage (max): 39 V
  • Input Voltage Range: 4.5 to 36 V
  • Output Voltage Range: 0.6 to 14 V
  • Output Current (max): 5 A
  • Switching Frequency: 0.6, 1.0, 2.2 MHz
  • Operating Temperature Range : -40 to +85 °C
  • Package: VMMP16LZ3030, 3.0 × 3.0 × 0.4 mm

Application Examples

  • 48 V power supply systems (BD9G500EFJ-LA) -Servers, charging stations, and power amps for 5G base stations requiring 48 V class power input. Electric bicycles, power tools, and other applications requiring 48/60 V class power input. Home appliances such as vacuum cleaners, washing machines, and other applications with motors exposed to large surge voltages
  • 24 V power supply systems (BD9F500QUZ) - Surveillance cameras and factory automation equipment such as PLCs and inverters requiring 24 V class power input. Power supplies for low-voltage control systems, including FPGAs and SoCs installed in various industrial equipment

Product Summary

  • BD9G500EFJ-LA: 7 to 76 V input / 5 A output, Single Channel Buck DC/DC converter with built-in high-side MOSFET (asynchronous rectification type)
  • BD9F500QUZ: 4.5 to 36 V input / 5 A output, Single Channel Buck DC/DC converter with built-in MOSFET (synchronous rectification type)
  • BD9G500EFJ-EVK-001: BD9G500EFJ-LA evaluation board
  • BD9F500QUZ-EVK-001: BD9F500QUZ evaluation board