Highly Efficient, Step-Up/Down DC-DC Converter Features Seamless Transition Switching
Note to Editor:
- The MAX8625A is a single-inductor, H-bridge, step-up/down DC-DC converter for applications with a 2.5V to 5.5V input-voltage range.
- This device provides glitch-free buck-boost transitions and high efficiency over wide input-voltage and load ranges, while saving space and cost.
- Maxim's proprietary three-phase, H-bridge topology employs three operating phases during each switching cycle to achieve seamless transitions through all operating modes.
- The MAX8625A is ideal for PDAs, smartphones, MP3 players, and other one-cell, Li+ applications that require a 3.3V or adjustable output.
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SUNNYVALE, CA—June 11, 2008—Maxim Integrated Products (PINK OTC MARKETS: MXIM) introduces the MAX8625A, a single-inductor, H-bridge, step-up/down DC-DC converter with seamless transition switching. Maxim's patented, seamless transition H-bridge topology* utilizes three operating phases during each switching cycle to achieve glitch-free buck-boost transitions, thus ensuring highly efficient switching. The MAX8625A minimizes output-ripple variation in transitions, and provides up to 92% efficiency over a wide, 2.5V to 5.5V input-voltage range. Consequently, this device eliminates the need for a two-chip, boost-then-buck design, thus saving board space and cost. The MAX8625A is ideal for PDAs, smartphones, MP3 players, and other one-cell Li+ applications that require a 3.3V or adjustable output.
Additional features include an ultra-low, 37µA quiescent current in skip mode, a fixed (3.3V) or adjustable (1.25V to 4V) output voltage, internal compensation, soft-start, and True Shutdown™ circuitry, which disconnects the output from the input when the IC is disabled. The MAX8625A is available in a tiny, 3mm x 3mm, 14-pin TDFN package and requires only a single inductor. It is fully specified over the -40°C to +85°C extended temperature range. Pricing starts at $2.45 (1000-up, FOB USA). An evaluation kit is available to speed designs and time to market.
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells over $2 billion of high-performance semiconductor products annually. It was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, Maxim has developed over 5700 products serving the industrial, communications, consumer, and computing markets. For more information, go to www.maxim-ic.com.
*U.S. Patent #7,298,119.
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