The EPCOS brand E6.3 SMT push-pull transformer series is a special development for the push-pull topology. The major benefit of this E6.3 SMT push-pull transformer is the ability to provide an additional galvanic insulated DC voltage on existing PCBs without an additional power supply. The push-pull switching function is available in many ICs; with a few components it is possible to transform existing DC voltages into another. The transformers are set up in center tap configuration, the turns ratio of the primary to the secondary define the output voltages. Typical voltage transformation values for this transformer are 3.3V to 5V, 3.3V to 12V, 5V to 12V, and so on.