Low profile buck-boost regulator is quietly efficient

Packaged as a 25-pad LGA with six-sided shielding, the Recom RBB10 buck-boost converter is now available from Dengrove Electronic Components. It is suitable for equipment such as USB voltage regenerators, 3.3 to 5.0V converters, and supercapacitor or Li-ion battery regulators. The all-round shielding enhances thermal performance as well as preventing EMI, adds Dengrove.

The non-isolated power module can supply up to 4A at 5.0V nominal output voltage, from an input that can range from 2.3 to 5.5V. Achieving up to 96 per cent efficiency, it will operate at full load in 85 degrees C ambient temperature without forced-air cooling.

The converter measures 12.19 x 12.19mm, making the RBB10-2.0 footprint compatible with the industry-standard DOSA third-generation, high-density, non-isolated PICO converter specification. At just 3.75mm high, however, it delivers a space-saving solution where a low profile is needed.

External pins provide control and monitoring functions, including trim and sense pins that allow the output voltage to be trimmed over a range between 1.0 and 5.5V by using external resistors. A mode pin selects power-save operation as a default, entering burst mode at loads under 350mA to reduce power consumption and extend battery life. Setting the mode pin low for permanent PWM operation prioritises accurate output voltage regulation independently of the load current. There is also a control pin for activating the device or selecting the 7 microA standby mode, and a power-good indicator for status monitoring.

An evaluation board, the RBB10-2.0-EVM-1, is available to help customers test the modules. Resistors are provided on-board for trimming the output voltage, as well as break out connectors for selecting operating modes. The board also features optimal thermal management and a class-B EMI filter layout.

Dengrove Electronic Components was established over 30 years ago. It provides a reliable and competitive component distribution service to a range of industry sectors.  Based in Bedfordshire, the independent franchised broadline distributor, has ISO9001 certification and includes companies such as Recom, Temas and Yuasa on its line-card.  The company also offers component sourcing and kitting services and can tailor its service to customers’ individual requirements.


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