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Demonstration circuit 1848A is a monolithic step-down DC/DC switching regulator featuring the LT3976. The LT3976 is a compact, high efficiency, high speed monolithic stepdown switching regulator that consumes only 3.3μA of quiescent current. The demo circuit is designed for 3.3V, 5A output from a 4.3V to 40V input. The switching frequency can be programmed either via oscillator resistor or external clock up to 2MHz. To synchronize to an external clock, move JP2 to SYNC and apply the external clock to the SYNC turret.



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