NATIONAL SEMICONDUCTOR LM5119, a high voltage, dual-channel, dual-phase, synchronous buck controller with emulated current-mode (ECM) control enables regulation of single or dual high-current voltages directly from inputs as high as 65V, simplifying high voltage dc-dc conversion and reducing pcb footprint by up to 50% versus alternative solutions requiring two conversion stages. Device provides a wide operating voltage range of 5.5V to 65V and a 0.8V, 1.5 percent reference enables accurate regulation of load voltages from 0.8V up to 90 percent of the input voltage. The operating frequency is user-programmable from 50 kHz up to 750 kHz and can be synchronized to an external clock signal.
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