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Industry: Email Alert RSS Feed600mA ultralow noise synchronous converter.(Monolithic Dual Output DC/DC Converters: High Performance Analog Solutions from Linear Technology)(Advertisement)
EDN, October, 2005
High efficiency, low ripple current and a small footprint are critical power supply design requirements for cell phones, MP3 players and other battery-powered portable devices. The LTC3448 delivers excellent performance in each of these areas. It is a high efficiency monolithic, synchronous buck regulator using a constant frequency, current mode architecture (see Figure 7). It achieves very low output ripple by automatically shifting to linear regulator operation at load currents below 3mA and pulse skipping operation at moderate load currents. This is a critical feature in applications such as cell phones, where low power supply noise is required while in standby mode. The combination of a 1.5MHz or 2.25MHz switching frequency and a tiny 3mm x 3mm DFN package (or...
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