First Step-Down DC-DC Converters to Deliver 500mA and Integrate Feedback Network in SC70
SUNNYVALE, CA—January 10, 2007—Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX8640Y/MAX8640Z, the industry's smallest 500mA, high-efficiency step-down DC-DC converters in a tiny SC70 package. These devices are ideal for applications where small size, high efficiency, and low output ripple are priorities. They utilize a proprietary switching scheme to reduce external component size and draw only 24µA of quiescent current, thus providing excellent light-load efficiency. This combination of small size and high efficiency makes them the industry's optimal solution for generating low-voltage microprocessor core supplies for cell phones, smartphones, digital cameras, and similar portable applications powered by a single-cell Li+ or 3-cell NiMH/NiCd batteries. Factory-preset output voltages from 0.8V to 2.5V eliminate external feedback-network components.
The high integration of the MAX8640Y/MAX8640Z enables the industry's smallest total solution size—13.4mm2 vs. the conventional 35mm2 of SOT23 solutions. These devices integrate a synchronous rectifier, which eliminates the need for an external diode and improves efficiency, especially at low output voltages. The devices also feature low output ripple at all loads, ultra-fast line- and load-transient response, and fast internal soft-start, which eliminates in rush current.
The MAX8640Y/MAX8640Z are available in 2mm x 2.1mm SC70 and 1mm x 1.5mm µDFN* packages. They are specified for the extended temperature range (-40°C to +85°C). Prices start at $1.58 (1000-up, FOB USA). An evaluation kit is available to speed designs.
*Future product—contact factory for availability.
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