Synchronous step-down regulator

  • 19-Mar-2010 03:18 EDT

Linear Technology’s LTC3616 is a high-efficiency, 4-MHz synchronous buck regulator that incorporates a constant-frequency, current-mode architecture. Low-resistance internal switches allow the unit to deliver up to 6 A of continuous output current from a 3 x 5 mm QFN package, and low dropout operation allows the output voltage to range from 0.6 V to millivolts below VIN. The device operates from an input voltage of 2.25 to 5.5 V, making it suited for single-cell Li-ion applications as well as 3.3- or 5-V intermediate bus systems. Its switching frequency is user-programmable from 300 kHz to 4 MHz, enabling the use of tiny, low-cost capacitors and inductors.

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