DC/DC step-down converter for 24VDC, 48VDC and 57VDC networks with CC-CV charging characteristics. This converter is optimized for 48V low voltage grids and can be powered by 57V Li-Ion battery systems with sufficient reserves and high performance. The high output current or short circuit current of 15A is designed for 12V consumer and 13.8V battery charging applications. The flat and compact design with specific power of 1.25Watt/gram is ideal for space critical applications.