ROHM – BD9G341AEFJ: High Efficiency 76V DC/DC Buck Converter

Power Regulation, Conversion and Management
The BD9G341AEFJ is a buck switching regulator with integrated 150mΩ power MOSFET. Current mode architecture provides fast transient response and a simple phase compensation setup. The operating frequency is programmable from 50kHz to 750kHz. Additional protection features include over-current protection, thermal shutdown and under-voltage lockout. The under-voltage lockout and hysteresis can be set by external resistor.


  • 12V to 76V input voltage range
  • Current mode operation
  • 1.0V ±1.5% reference voltage
  • Soft start function
  • Overcurrent protection (OCP), under-voltage lockout (UVLO)
  • Thermal shutdown (TSD), over-voltage protection (OVP)
  • Integrated 80V/3.5A/150mΩ NchFET
  • 50kHz to 750kHz variable frequency
  • ±3% precision EN threshold
  • 0μA stand-by current
  • Thermally enhanced HTSOP-J8 package
  • 2.5k MSRP $1.82US