dc2139a DC2139A LT8610A Demo Board | Micropower Sync Buck, 5.5V ≤ VIN ≤ 42V Input, VOUT = 5V @ 3.5A Demonstration circuit 2139A is a 42V, 3.5A micropower synchronous step-down regulator featuring the LT8610A. The LT8610A 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 and is unloaded. The 2139A uses two input ceramic capacitors in series to improve reliability in case of an input capacitor short failure. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8610A to minimize external components and simplify design. DC2139A