Dual synchronous step-down dc/dc converter

Staff -- Control Engineering, 1/1/2006

LTC3417 dual output, high-efficiency, 4-MHz synchronous buck regulator delivers up to 1.4 A of continuous output current from one channel and up to 800 mA from the second. Device uses constant frequency and current mode architecture and operates from an input voltage range of 2.25-5.5 V. It is suited for single cell Li-Ion, multi-cell alkaline, or NiMH applications and can generate two independent output voltages as low as 0.6 V, enabling it to power the latest generation low voltage DSPs and microcontrollers. Switching frequency of up to 4 MHz allows the use of tiny, low-cost ceramic capacitors and inductors less than 2 mm in height. Two models are offered: LTC3417EDHC in a DFN-16 package and LTC3417EFE in a thermally enhanced TSSOP package. www.linear.com, Linear Technology Corp.