Non-isolated DC-DC converter in SMD LGA package for 48V designs

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By Nick Flaherty

Recom has launched a 500mA non-isolated DC-DC converter and switching regulator in a surface mount LGA package with an input range from 4.3V up to 65V and five trimmable output options. 

The RPMH-0.5 series expands the RPM range in a standard 12.19 x 12.19 x 3.75mm DOSA-compatible thermally-enhanced low profile LGA package. There are five trimmable fixed outputs available: 3.3V (+10%/-20%), 5V (+10 percent/-20 percent), 12V (+10 percent/-40 percent), 15V (+10 percent/-40 percent) or 24V (+17 percent/ -37 percent). The input voltage range is 1V to 1.5V above the set output up to 65V, making the parts suitable for systems operating on nominal 5, 12, 24 or 48V rails.

The thermal management means that the RPMH-0.5 series operates from -40°C up to 95°C (100°C) ambient with full load and convection cooling only.

Efficiency is up to 89 percent allowing the full 500mA output current to be delivered across the entire input voltage range.  Efficiency is also high at very low loads, which, combined with very low quiescent current down to 16µA (3.3V and 5V versions), makes this series suitable for applications that have ‘sleep’ modes such as microcontrollers and transceivers.

The RPMH also has 6-sided shielding for low radiated EMI so ‘Class B‘ EMI compliance is achieved with a simple low cost line inductor.  Additional features include full protection (UVLO, SCP, OCP) along with power sequencing, soft start, on/off control, remote sensing and a power good signal.

“Because of the adoption of 48V in soft hybrid vehicles, we see the cost of Li-ion batteries falling and 48V power rails increasingly being used in many other application areas. When down-conversion to a lower voltage is necessary, the RPMH-0.5 series is a perfect fit with its wide input range up to 65V,“ said Steve Roberts, Innovation Manager at Recom.

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

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