Rohm: BD9E301EFJ: 36V, 2.5A Integrated Synchronous Buck DC/DC Converter

The BD9E301EFJ-LB is a synchronous buck switching regulator with built-in power MOSFETs. It supports 7.0V to 36V input voltage range and is capable of up to 2.5A output current. The D9E301EFJ-LB is a current mode control regulator with high speed transient response. Phase compensation can also be set easily. The D9E301EFJ-LB provides complete protection features including short circuit protection, under-voltage lockout protection, thermal shutdown, overcurrent protection, reverse current protection and over-voltage protection.


  • 7.0V to 36V input voltage range
  • 2.5A (Max) output current
  • 170mΩ high side MOSFET ON-resistance
  • 140mΩ low side MOSFET ON-resistance
  • 1.0V to VIN x 0.7V output voltage range
  • 570kHz (typ) switching frequency
  • Under-voltage lockout protection
  • Overcurrent protection