LTC3118 Datasheet | Linear Technology

Features nn Integrated High Efficiency Dual Input Power Path™ Plus Buck-Boost DC/DC Converter nn Ideal Diode or Priority VIN Select Modes nn VIN1 and VIN2 Range: 2.2V to 18V nn VOUT Range: 2V to 18V nn Either VIN Can Be Above, Below or Equal to VOUT nn Generates 5V at 2A for VIN > 6V nn 1.2MHz Low Noise Fixed Frequency Operation nn Current Mode Control nn All Internal N-Channel MOSFETs nn Pin-Selectable PWM or Burst Mode® Operation nn Accurate, Independent RUN Pin Thresholds nn Up to 94% Efficiency nn VIN and VOUT Power Good Indicators nn IQ of 50µA in Sleep, 2µA in Shutdown nn 4mm × 5mm 24-Lead QFN or 28-Lead TSSOP Packages Applications nn Systems with Multiple Input Sources nn Back Up Power Systems nn Wall Adapter or Li-Ion(s) Input to 5VOUT nn Battery or Super Capacitor Input for Reserve Power nn Replace Diode-OR Designs with Higher Efficiency, Flexibility and Performance 18V, 2A Buck-Boost DC/DC Converter with Low Loss Dual Input Power Path Description The LTC®3118 is a dual-input, wide voltage range synchronous buck-boost DC/DC converter with an intelligent, integrated, low loss Power Path control. The unique power switch architecture provides efficient operation from either input source to a programmable output voltage above, below or equal to the input. Voltage capability of up to 18V provides flexibility and voltage margin for a wide variety of applications and power sources. The LTC3118 uses a low noise, current mode architecture with a fixed 1.2MHz PWM mode frequency that minimizes the solution footprint. For high efficiency at light loads, automatic Burst Mode operation can be selected consuming only 50µA of quiescent current in sleep. System level Features include ideal diode or VIN priority modes, VIN and VOUT power good indicators, accurate RUN parators to program independent UVLO thresholds, and output disconnect in shutdown. Other Features include 2µA shutdown current, short-circuit protection, soft-start, current limit and thermal...