New-Tech Europe Magazine | Q1 2021

The examples described so far have been non-isolated DC/DC switching regulators. When safety agency- rated isolation is required, necessary creepage and clearance distances define a minimum X or Y dimension. For example, in medical applications with mains system voltages, 8mm creepage is required between input and output for two Measures Of Patient Protection (2MOPP). Given this minimum packaging dimension, a more traditional approach can be taken, with an internal die for a power and control IC wire-bonded to a DVE SOIC-16 leadframe, then conventionally over-molded, such as in the RECOM R05CTxx part. The transformer in this DC/DC converter is a proprietary, very low profile, planar-type design, achieving 5k VAC isolation voltage and reinforced, 2MOPP isolation. The overall height of the part is only 2.65mm, making it suitable for card-type applications as the height of the isolated DC/DC converter is no higher than all of the other SMT components. The RECOM R05CTxx delivers 500mW with 5V input and 5V or 3.3V outputs and is particularly suitable for powering isolated interfaces, in critical medical and industrial applications offering full line and load regulation with an external enable input. The goal of making low power

Figure 3: Half watt isolated DC/DC in an SOIC-16 package

non-isolated DC/DC switching regulators and isolated converters IC-like is now largely achieved using a combination of innovative 3D packaging and integrated- inductor technologies, with further improvements to performance and power density expected in the future. RECOM has a range of products that represent the state- of-the-art in 3D DC/DC converter packaging in modern formats such as QFN and SOIC-16. An evaluation board is available, showcasing the products mentioned in this article, which can be ordered at www.

recom-power.com/3dpp (Figure 4). RECOM is an Austria-based power conversion company with a global design and manufacturing infrastructure,withmultiple locations in Europe, Taiwan and China. RECOM lowers supply chain risk for its customers with representation by major distributors round the world, offering comprehensive logistics and technical support.

References [1] RECOM: www.recom-power.com

Figure 4: An evaluation board showcasing latest RECOM DC/DC packaging technology

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