DC2012A

DC2012A demonstration circuit is a 42V, 3.5A micropower synchronous step-down regulator featuring the LT®8610AB. The LT8610AB is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5µA of quiescent current when output is regulated at 5V. The efficiency of the circuit is greater than 90% at light load up to 1.5A. This is a 10% improvement over competing parts. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8610AB to minimize external components and simplify design. The SYNC pin on the demo board is grounded by default for low ripple burst mode operation. To synchronous to an external clock, move JP1 to SYNC and apply the external clock to the SYNC turret. Once JP1 is on SYNC position, a DC voltage of higher than 2V or INTVCC can be applied to the SYNC turret for pulse-skipping operation. shows the efficiency of the circuit at 12V input.