Demonstration circuit 1832A is a monolithic step-down DC/DC switching regulator featuring the LT3995. The LT3995 is a compact, high efficiency monolithic step-down switching regulator that consumes only 2.7μA of quiescent current. The demo circuit is designed for 3.3V, 3A output from a 4.3V to 60V 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. The RT resistor (R5) should be chosen to set the LT3995 internal switching frequency at least 20% below the lowest synchronization input frequency.