The LTC3854 is a high performance synchronous stepdown switching DC/DC controller that drives an all N-channel synchronous power MOSFET stage. The LTC3854 features a 400kHz constant frequency current mode architecture. The LTC3854 operates from a 4.5V to 38V (40V absolute maximum) input voltage range and regulates the output voltage from 0.8V to 5.5V. The RUN/SS pin provides both soft-start and enable features. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. Current foldback limits MOSFET dissipation during short circuit conditions. Current foldback functions are disabled during soft-start. The LTC3854 has a minimum on-time at 75ns, making it well suited for high step-down ratios. The strong onboard MOSFET drivers allow the use of high power external MOSFETs to produce output currents up to 20A. Applications * Automotive Systems * Telecom Systems * Industrial Equipment * Distributed DC Power Systems * Wide Operating VIN Range: 4.5V to 38V * RSENSE or DCR Current Sensing * ±1% 0.8V Reference Accuracy Over Temperature * 400kHz Switching Frequency * Dual N-channel MOSFET Synchronous Drive * Very Low Dropout Operation: 97% Duty Cycle * Starts Up Into Pre-Biased Output * Adjustable Output Voltage Soft-Start * Output Current Foldback Limiting (Disabled During Soft-Start) * Output Overvoltage Protection * 5V LDO for External Gate Drive * OPTI-LOOP® Compensation Minimizes COUT * Low Shutdown IQ: 15μA * Tiny Thermally Enhanced 12-Pin 2mm × 3mm DFN and MSOP Packages https://elecena.pl/product/850199/small-footprint-wide-v-range-synchronous-step-down-dc-dc-controller 2009-05-19 https://elecena.pl/product/850199/small-footprint-wide-v-range-synchronous-step-down-dc-dc-controller 2017-10-12 https://elecena.pl/product/850199/small-footprint-wide-v-range-synchronous-step-down-dc-dc-controller 2025-01-17