300W buck-boost DC-DC converter series

Featured Product from TDK-Lambda Americas Inc.

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TDK Corporation (TSE 6762) announces the addition of 12.5A 300W rated models to the i7C non-isolated DC-DC converter series. With an input range of 9 to 53Vdc, the output can be adjusted from 5 to 28V.  The i7C topology enables a seamless transition from buck (voltage reduction) to boost (voltage increase) operation.  The series is ideal for generating additional high power outputs, from existing 12, 24, 36 or 48V system voltages, in medical, communications, industrial, test and measurement and battery powered equipment.


Efficiencies of up to 96% minimize power losses, allowing the product to operate and deliver high useable power in demanding thermal environments. Under light load conditions, the i7C’s control techniques significantly reduce power dissipation. A 5mA input current draw is typical under zero load conditions. This can be reduced to typically 0.25mA when the remote on-off is utilized to place the unit in standby mode.  The low quiescent current allows battery powered equipment to remain functional longer during periods of non-operation.


The basic feature models include an output voltage adjustment pin, positive or negative logic remote on-off, positive remote sense, plus input under-voltage, over-current and thermal protection.  The full-featured models are equipped with a power good signal, output current monitoring and the ability to synchronize the operating frequency to minimize system noise. 


All the i7C converters measure 34mm x 36.8mm and follow the industry standard 1/16th brick pin-out.  Three mechanical configurations are available - a low 12.2mm high open frame model, a baseplate construction for conduction cooling or with an integral heat sink for convection or forced air cooled environments.  The design of the i7C reduces the number of external   components, saving both cost and board space.


All models are certified IEC/UL/EN 62368-1, 60950-1 and carry the CE mark for the Low Voltage and RoHS Directives.


More information on the 12.5A i7C models, including distributor inventory, can be obtained from the TDK-Lambda Americas website at https://www.us.lambda.tdk.com.


Main applications

  • Medical, communications, industrial, test and measurement and battery powered equipment


Main features and benefits

  • Up to 300W in a 1/16th brick pin-out
  • Up to 96% efficient with low off-load power consumption
  • Wide 5 to 28V output adjustment
  • Wide 9 to 53Vdc input range
  • Low component count with minimal external components
  • Low airflow with minimal derating requirements


Key data




Input voltage range


9 to 53

Output voltage


5 to 28

Maximum output current



Maximum output power





Up to 96

Optional features


Power good signal, frequency synchronization and current monitoring

Safety Certifications


IEC/EN/UL 62368-1 and 60950-1. CE Marked to the LV Directive

Size (W x H x L)


34 x 36.8 x 12.2 (open frame model)



Open frame, baseplate or integral finned heatsink