The LTC3891 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage. A constant frequency current mode architecture allows a phase-lockable frequency of up to 750kHz. The 50μA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3891 features a precision 0.8V reference and power good output indicator. A wide 4V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. The output voltage of the LTC3891 can be programmed between 0.8V to 24V. The TRACK/SS pin ramps the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous conduction mode at light loads. Applications * Automotive Always-On Systems * Battery Powered Digital Devices * Distributed DC Power Systems * Wide VIN Range: 4V to 60V (65V Abs Max) * Low Operating IQ: 50μA * Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V * RSENSE or DCR Current Sensing * Phase-Lockable Frequency (75kHz to 750kHz) * Programmable Fixed Frequency (50kHz to 900kHz) * Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Load * Selectable Current Limit * Very Low Dropout Operation: 99% Duty Cycle * Adjustable Output Voltage Soft-Start or Tracking * Power Good Output Voltage Monitor * Output Overvoltage Protection * Low Shutdown IQ: < 14μA * Internal LDO Powers Gate Drive from VIN or EXTVCC * No Current Foldback During Start-Up * Small 20-Pin 3mm × 4mm QFN and TSSOP Packages https://elecena.pl/product/1198161/low-i-60v-synchronous-step-down-controller 2010-10-22 https://elecena.pl/product/1198161/low-i-60v-synchronous-step-down-controller 2017-10-12 https://elecena.pl/product/1198161/low-i-60v-synchronous-step-down-controller 2025-01-19