资 源 简 介
The LTC®3851 is a high performance synchronousstep-down switching regulator controller that drivesan all N-channel synchronous power MOSFET stage. Acon stant frequency current mode architecture allows aphase-lockable frequency of up to 750kHz.OPTI-LOOP compensaTIon allows the transient responseto be opTImized over a wide range of output capacitanceand ESR values. The LTC3851 features a precision 0.8Vreference that is compaTIble with a wide 4V to 38V inputsupply range.The TK/SS pin ramps the output voltage during start-up.Current foldback limits MOSFET heat dissipation duringshort-circuit conditions. The MODE/PLLIN pin selectsamong Burst Mode operation, pulse skipping mode orcontinuous inductor current mode at light loads and allowsthe IC to be synchronized to an external clock.
