The LTC3851EGN#PBF is a high-performance synchronous step-down Switching Regulator Controller drives an all N-channel synchronous power MOSFET stage. The constant frequency current-mode architecture allows a phase-lockable frequency of up to 750kHz. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3851 features a precision 0.8V reference that is compatible with a wide 4 to 38V input supply range. The TK/SS pin ramps the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The MODE/PLLIN pin selects among Burst Mode operation, pulse skipping mode or continuous inductor current-mode at light loads and allows the IC to be synchronized to an external clock.
±1% Output voltage accuracy
Dual N-channel MOSFET synchronous drive
Adjustable output voltage soft-start or tracking
Output current foldback limiting
Output overvoltage protection
Selectable continuous, pulse-skipping or burst mode operation at light loads
(EN)
