Milpitas, Calif. - Using a new two-phase spread-spectrum switching architecture to minimize harmonics, Linear Technology's LTC3252 inductorless step-down dc/dc converter can deliver up to 250 milliamps of continuous current at each output. It works from a 2.7- to 5.5-volt input, and thus is suitable for single-cell lithium-ion or multicell nickel metal hydride or alkaline applications. The converter's switching architecture ensures a very low-noise input at its 0.9- to 1.6-V regulated output, the company said. The switching frequency shifts between 1 and 1.6 MHz in the continuous and spread-spectrum-with-burst modes. Operating efficiency is as high as 88 percent. The LTC3252 is available from stock in a DFN-12 package and starts at $2.60 each in quantities of 1,000.
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