DC-DC Converters In SOIC-16 Package With Isolation Features

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The device provides direct connectivity to the load, has comprehensive protection and control features and suitable for medical applications

This high-isolation, high power density, 0.5W DC-DC converter provides a fully regulated, low-noise output. The R05CT05S has a nominal 5V input (4.5 – 5.5V) and is settable by a resistor to 3.3 or 5VDC for direct connection to the load or alternatively 3.7 or 5.4VDC to power a downstream LDO for ultra-low noise applications.

Operating with just convection cooling, the full output power is available from -40 degrees Celsius to +55 degrees Celsius with only 20 per cent derating at 110 degrees Celsius. Maximum ambient temperature is 140 degrees Celsius.

Isolation and Protection Features

Isolation of the R05CT05S is 5kVAC/1min, achieving reinforced/800VAC rating to IEC 62368-1 and 2MOPP/250VAC rating to IEC-60601-1 for medical applications up to 5000m altitude. Isolation capacitance is particularly low at 3.5pF typical, making the part very suitable for applications with high common-mode, switched voltages such as high-side gate driver power supplies.

Along with a 2.5M hours/55 degrees Celsius MTBF rating, comprehensive protection and control features are provided, including short-circuit immunity, over-temperature shutdown, and under-voltage lockout, while the part can be synchronized to an external clock and disabled with low standby current by using an ON/OFF control.

The SOIC-16 package of the R05CT05S comes in a compact 10.3mm x 7.5mm footprint with a low profile of 2.6mm, leveraging an internal 3D power packaging construction with advanced planar transformer technology and fully automated manufacturing.

The device’s SMT IC packaging allows it to be handled and placed like other surface-mount devices.

“The R05CT05S is offered at a price-point where it can be considered for general use such as in COM port or industrial PLC I/O power isolation, IoT/IIoT sensors and smart metering as well as in more critical application areas such as gate drives, medical and industrial, where the high shock, vibration, temperature and isolation ratings are a real benefit,” said Matthew Dauterive DC-DC Product Manager of RECOM.

Samples and OEM pricing are available from all authorised distributors or directly from RECOM.


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