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Dual Quarter-Brick DC/DC Converter

Tue, 01/29/2002 - 3:56am
di/dt introduced the QD48 family of DC/DC converters, the industry's first dual quarter-bricks with independently regulated outputs. The 3.3 V/5 V version simultaneously delivers 15A at 3.3 V and 10 A at 5 V (100 watts). The QD family is available in any combination of outputs from 5 V down to 1.2 V (5 V, 3.3 V, 2.5 V, 2.0 V, 1.8 V, 1.5 V, and 1.2 V), simultaneously delivering 15 A per output (10 A for 5 V).

Since the QD48 converters utilize independent power trains and control functions for each output, they provide precise set points (± 1%) and extremely tight output voltage regulation for each output, ± 2% over all line, load, and temperature conditions. Cross-channel interference is virtually non-existent, even during load transients. Transient performance for each output is an order of magnitude better than competing dual quarter-bricks.

The QD48 converters come in an open-frame package that does not require a heatsink. They have dimensions of 1.45× 2.3 (36.8 mm × 58.4 mm), with a height as low as 0.26 (6.6 mm). They weigh 25.5 g (0.9 oz.), also the lowest in the industry. The surface mount version is shipped in tape-and-reel packing to facilitate automatic handling and pick-and-place assembly.

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