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Micrel dc/dc controllers have low pin-count packages

Posted: 26 Jun 2003 ?? ?Print Version ?Bookmark and Share

Keywords:micrel semiconductor? dc/dc controller? micC2198? mic2199? mic2193?

Micrel Semiconductor has released a family of five high-efficiency dc/dc controllers that are housed in small, low pin-count packages. The MIC2198 and MIC2199 devices feature an output voltage of 0.8V, current of 20A, and have 95 percent efficient. The devices operate over the 4.5V to 32V input voltage range that makes them suitable for 5V, 12V, and 24V power bus systems.

The 500kHz operating frequency of the MIC2198 saves board space by allowing the use of small external inductor and capacitors, while the 300kHz operating frequency of the MIC2199 allows higher efficiency in high input voltage systems by reducing switching losses.

The MIC2193 is a synchronous buck controller that can achieve duty-cycles up to 100 percent, while the MIC2194 is a flexible buck controller designed for buck "step-down" applications and can also be configured in a buck-boost circuit that generates negative voltages.

The MIC2196 is a boost "step-up" controller that can generate high output voltages and currents. The MIC2193, MIC2194, and MIC2196 operate from 2.9V to 14V input voltages, allowing them to step up or step down 3.3V, 5V, and 12V power rails.

The MIC2198 and MIC2199 are available in 4-by-4mm MLFTM 12-lead packages and are priced at $1.99 each, while the MIC2193BM, MIC2194BM and MIC2196BM are available in SO-8 packages and are priced at $1.97 each.

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