Efficient, 2.5 MHz Synchronous Buck Regulator for Light Load Operation
Productive Product: Micrel launched the MIC2238, a 2.5 MHz dual 800 mA synchronous buck (step-down) regulator housed in a 3 mm × 3 mm MLF package. Its unique switching architecture scheme, Trickle Mode, enables desirable light load efficiency for Li-Ion battery powered systems that require maximum efficiency in order to prolong use. The MIC2238 is appropriate for portable applications including cellular phones, portable media players, WiMax modules, GPS systems, digital still and video cameras. The device offers an input voltage range from 2.5 to 5.5V and a low quiescent current of 28 µA at light loads. This assures that only a trickle of current is drawn from the battery, thereby and extending valuable standby time. In addition, the device offers a power good output signal for sequencing capability. The MIC2238 is available with pricing starting at $1.70, for 1K quantities.