Tiny encapsulated buck regulators supply up to 20A

Using the latest circuit and fabrication technology has enabled RECOM to offer a new range of low-cost, encapsulated buck regulators in ultra-compact, thermally enhanced LGA and QFN packages with 1, 3, 10, and 20A output current ratings.

The RPL-1.0 has a 3mm x 3mm LGA footprint and is only 2mm tall. It operates over an input range of 3V to 22V with an adjustable output of 0.6V to 12V. 1A output is available to an ambient temperature of more than 80C, depending on input/output voltage combinations, and operation up to 125C ambient is possible with derating. Efficiency is up to 95%.

The RPH-3.0 is in a 47-pad QFN package with a 10mm x 12mm footprint and a 4mm height. It provides 3A output over an input range of 4.5V to 55V and an adjustable output range of 1V to 15V. Efficiency is up to 91%, and full output current can be taken to over 80C at 12Vin and 3.3Vout, for example.

Part RPL-10 is rated at 10A output and is richly featured. In an LGA-M package just 7mm x 7mm, 4.4mm high, the regulator has an input range of 4V to 16V and a programmable output of 0.6V to 5.5V. Efficiency is high at up to 94%, allowing operation up to 90C at full load. Operating frequency is selectable between 600kHz and 800kHz, control is by constant on-time for fast transient response, and a pulse skipping mode maintains efficiency at light load.

Finally, the RPL-20 takes power density to a new level with its 20A rating from a programmable output of 0.6V to 5.5V. Input range is 4V to 16V, and efficiency is as high as 94%, enabling operation at up to 90C ambient at full load. The package size is the same as the RPL-10 at 7mm x 7mm, which is 4.4mm high, effectively doubling the power density. Operating frequency can be set between 600kHz and 1MHz, with forced continuous conduction and pulse skipping modes as selectable options.

All these products feature integrated magnetics and include remote on/off, a power good signal, and comprehensive protection against input under-voltage, over-temperature, short circuits, and output overload.

“These buck converters are ideal for use in tight spaces where high efficiency is also required,” comments Matthew Dauterive, MSc product manager DC-DC of RECOM. “They excel in applications such as portable equipment, imaging systems, distributed power architectures, and power supplies to FGPAs as well as in general telecom and industrial uses.”