DC-DC converters in DFN packages by Mornsun are now available from Relec Electronics. The R4 is the fourth generation of surface mount DC-DC converters, designed to space space and reduce the size of distributed power systems. The DFN package measures 9.0mm x 7.0mm x 3.1mm. It occupies 63mm2, compared to 155mm2 for SMD8 footprint DC-DC converters, saving nearly 60% of board space, says the company.

The converters are available as non-isolated switching regulators or unregulated DC-DC converters with 3kV isolation, and are suitable for distributed power supply systems, low frequency analogue circuits, industrial control, instrumentation and electric power products.

The series comprises the K78_MT-500R4 non-isolated switching regulators and the B0505MT-1WR4, a 1W isolated DC-DC converter.

The K78_MT-500R4 switching regulators provide 500mA or regulated power and are available with outputs from 3.3V – 15Vdc from a 4.5V – 36Vdc input source.

They allow systems to run cooler without the need for external heatsinks. The K78xxMT-500R4 series operating range is -40°C to +105°C.  The up to 92% efficiency, low losses and short-circuit protection make the DC-DC converters suitable for industrial control, instrumentation and electric power.

The B0505MT-1WR4 has a 5Vdc input and 5Vdc output. It operates over an ambient temperature range of -40°C to +125°C. It achieves 3000Vdc isolation with efficiency up to 85% and no heatsink is required. Target applications are in distributed power supply systems and, Relec says, it is particularly suitable for use in applications such as digital circuits, low frequency analogue circuits, relay-driven circuits and data switching circuits.

Both the K78_MT-500R4 and the B0505MT-1WR4 are designed in accordance with AEC-Q100, for automotive applications.

The Mornsun R4 Series are available on a standard lead time of four weeks.