Maxim has introduced the MAX8625A, a single-inductor, H-bridge, step-up/down DC-DC converter. Maxim's patented, seamless transition H-bridge topology utilises three operating phases during each switching cycle to achieve glitch-free buck-boost transitions, thus ensuring highly efficient switching.
The MAX8625A minimises output-ripple variation in transitions, and provides up to 92% efficiency over a 2,5 V to 5,5 V input voltage range. Consequently, this device eliminates the need for a two-chip, boost-then-buck design, thus saving board space and cost. The device is ideal for single-cell Li+ applications that require a 3,3 V or adjustable output.
Additional features include 37 μA quiescent current in skip mode, a fixed (3,3 V) or adjustable (1,25 to 4 V) output voltage, internal compensation, soft-start and TrueShutdown circuitry, which disconnects the output from the input when the IC is disabled.
The MAX8625A is available in a 3 x 3 mm, 14-pin TDFN package and requires only a single inductor. It is fully specified over the -40°C to +85°C temperature range.
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