Non-isolated DC-DC regulator excellent for down-conversion to a lower voltage

14-09-2020 | Rutronik | Power

Rutronik has released the new RPMH-0.5 series of 0.5A non-isolated DC-DC switching regulators from Recom from its product portfolio. They feature an input range from 4.3V and up to 65V with five trimmable output options and is supplied in a standard DOSA-compatible low profile LGA package.


Due to the increasing number of soft hybrid vehicles with 48V board net, the cost of Li-ion batteries are dropping, and 48V power rails are increasingly being employed in many other application areas. Here, the new series is excellent for down-conversion to a lower voltage.


With 0.5A output, five trimmable fixed outputs are offered: 3.3V (+10%/-20%), 5V (+10%/-20%), 12V (+10%/-40%), 15V (+10%/-40%) or 24V (+17%/-37%). Input voltage range is 1V-1.5V above the set output up to 65V, making the converters appropriate for systems operating on nominal 5, 12, 24 or 48V rails. Thanks to its superior thermal management the series runs from -40C up to 95C (100C) ambient with full load and convection cooling only. Due to its efficiency of up to 89%, the full 500mA output current can be provided across the complete input voltage range. Efficiency is also exceptional at very low loads, which, combined with very low quiescent current down to 16µA (3.3V and 5V versions), makes the series ideal for applications that have ‘sleep’ modes including microcontrollers and transceivers.


For low radiated EMI the RPMH provides a six-sided shielding so ‘Class B‘ EMI compliance is accomplished with a simple low-cost line inductor. Further features incorporate full protection (UVLO, SCP, OCP) along with power sequencing, on/off control, soft start, remote sensing and a power good signal.


To complement series, the company also provides the RPMH-0.5-EVM-1 from Recom for simple evaluation of control, power good and sensing functions.

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