Sixteenth-brick Isolated DC/DC Converter

Murata Power Solutions
Part Number Information
Part #: Price/Availability:
ULS 60 Buy Now
ULS 100 Buy Now

The world of “brick” DC/DC converters has seen a steady size reduction. The ULS series makes another dramatic size shrink down to a “sixteenth brick” width (0.9 inches) while still retaining up to 66 Watt output and full 2250 Volt DC isolation. The PC-board mount converter family accepts 36 to 75 Volts DC inputs and delivers fixed outputs regulated to within ±0.2%.

ULS outputs may be trimmed within ±10% of nominal output while delivering fast settling to current step loads and no adverse effects from higher capacitive loads. Excellent ripple and noise specifications assure compatibility to circuits using CPU’s, ASIC’s, programmable logic and FPGA’s. No minimum load is required. For systems requiring controlled startup/shutdown, an external remote On/Off control may use a switch, transistor or digital logic. Remote Sense inputs compensate for resistive line drops at high currents.

Many self-protection features on the ULS series avoid both converter and external circuit hazards. These include input undervoltage lockout and overtemperature shutdown. The outputs current limit using the “hiccup” autorestart technique and the outputs may be short-circuited indefinitely. Additional features include output overvoltage and reverse conduction elimination.

The synchronous rectifier forward topology yields high efficiency for minimal heat buildup and “no fan” operation.


  • Small footprint DC/DC converter, ideal for high current applications
  • Tiny 0.9" x 1.3" x 0.40" open frame package
  • Industry standard DOSA "brick" format and pinout with surface mount option
  • 36-75 Volts DC input range
  • 2250 Volt Basic input/output isolation (48V models)
  • Up to 66 Watts total output power with overtemperature shutdown
  • High efficiency synchronous rectifier forward topology
  • Stable no-load operation with no required external components
  • Operating temperature range -40 to +85°C with derating
  • Certified to UL 60950-1, CSA-C22.2 No. 234, EN60950-1 safety approvals, 2nd Edition
  • Extensive self-protection shut down features


  • Datacom and telecom
  • Cell phone towers
  • Data centers
  • Server farms and network repeaters