Low-loss Schottky diodes for DC/DC conversion

New low-forward-voltage compact SMD Schottky diodes from Shindengen provide secondary rectification in DC/DC convertor applications.

New low-forward-voltage compact SMD Schottky diodes from Shindengen provide secondary rectification in DC/DC convertor applications, and protect portable equipment such as telephone handsets, PDAs, digital cameras and notebook PCs against battery reverse current and short circuit conditions.

These may be caused by incorrect connection of an AC adapter or battery charger.

The M-series diodes for DC/DC convertor applications are suitable for use in step-down, boost and inversion circuit topologies up to 30V maximum reverse voltage.

Forward voltage drop is 0.4V, minimising in-circuit losses.

The M1FM3 packs 3A continuous forward current handling into the industry standard M1F surface mount package measuring 1.8 x 3.9 x 1.4mm M1F.

The 5A D1FM3 in industry standard D1F packaging measures 2.5 x 5.0 x 2.0mm, and the M2FM3 for forward current up to 6A is packaged to M2F standard measuring 3.75 x 5.1 x 2.0mm.

For reverse current protection, Shindengen has developed the H-series SM diodes with ultralow forward voltage drop of 0.3V.

Maximum reverse voltage is 30V, and package options are the same as the M-series.

The M1FH3 handles continuous forward current 1.5A in the small M1 outline, with the D1FH3 rated for 3A current and available in the D1F package.

The M2FH3 in the M2F package protects equipment drawing up to 6A in normal operation.

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