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Tiny DC-DCs aimed at small portable devices

Mon, 03/12/2012 - 9:29am
ECN Europe

Murata Americas has added to its LXDC series of ultra compact DC-DC converters that are aimed at mobile consumer electronics.  The new devices, comprising the LXDC55B step-down and LXDC44A step-up models complement the existing LXDC2UR and LXDC3EP devices.

The LXDC55B measures 5.7 x 5.0 x 2.1 mm and can support output currents up to 3.0 A. Input voltage is within the range 2.7 to 5.5 VDC across the series and single output models provide the nominal output of 1.2, 1.8, 2.5, 3.0 or 3.3 VDC. Operating as an output boost converter, the LXDC44A measuring 4.0 x 4.0 x 2.0 mm can deliver up to 0.7 A output at 5 VDC from an input of 2.7 to 4.5 VDC.

The existing models LXDC2UR and the LXDC3EP, measuring 2.5 x 2.3 mm and 3.5 x 3.2 mm respectively, are believed to be the World's smallest DC-DC converters.

Constructed on a ferrite substrate with an embedded inductor, multi-layer construction and integrating the power IC and I/O capacitors together the LXDC family has good EMI suppression and reduced harmonic noise characteristics.

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