LTC3118 Series

18V, 2A Buck-Boost DC/DC Converter with Low-Loss Dual Input PowerPath

Catalog

18V, 2A Buck-Boost DC/DC Converter with Low-Loss Dual Input PowerPath

Part	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Supplier Device Package	Current - Output	Voltage - Output (Min/Fixed) [Min]	Output Configuration	Package / Case	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Function	Voltage - Output (Max) [Max]	Topology	Mounting Type	Number of Outputs	Frequency - Switching	Package / Case [custom]	Package / Case [x]
Analog Devices LTC3118HUFD#PBF	150 °C	-40 °C	Adjustable	24-QFN (4x5)	2 A	2 V	Positive	24-WFQFN Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz
Analog Devices LTC3118EFE#PBF	125 ¯C	-40 °C	Adjustable	28-TSSOP-EP	2 A	2 V	Positive	28-TSSOP Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz	4.4 mm	0.173 in
Analog Devices LTC3118IFE#PBF	125 ¯C	-40 °C	Adjustable	28-TSSOP-EP	2 A	2 V	Positive	28-TSSOP Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz	4.4 mm	0.173 in
Analog Devices LTC3118EFE	125 ¯C	-40 °C	Adjustable	24-QFN (4x5)	2 A	2 V	Positive	24-WFQFN Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz
Analog Devices LTC3118EUFD#PBF	125 ¯C	-40 °C	Adjustable	24-QFN (4x5)	2 A	2 V	Positive	24-WFQFN Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz
Analog Devices LTC3118MPUFD#TRPBF	150 °C	-55 °C	Adjustable	24-QFN (4x5)	2 A	2 V	Positive	24-WFQFN Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz
Analog Devices LTC3118IFE	125 ¯C	-40 °C	Adjustable	24-QFN (4x5)	2 A	2 V	Positive	24-WFQFN Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz
Analog Devices LTC3118IUFD#PBF	125 ¯C	-40 °C	Adjustable	24-QFN (4x5)	2 A	2 V	Positive	24-WFQFN Exposed Pad	18 V	2.2 V	Step-Up/Step-Down	18 V	Buck-Boost	Surface Mount	1	1.2 MHz

Catalog

18V, 2A Buck-Boost DC/DC Converter with Low-Loss Dual Input PowerPath

Key Features

• Integrated High Efficiency Dual Input PowerPath™Plus Buck-Boost DC/DC Converter

• Ideal Diode or Priority VINSelect Modes

• VIN1and VIN2Range: 2.2V to 18V

• VOUTRange: 2V to 18V

• Either VINCan Be Above, Below or Equal to VOUT

• Generates 5V at 2A for VIN> 6V

• 1.2MHz Low Noise Fixed Frequency Operation

• Current Mode Control

• All Internal N-Channel MOSFETs

• Pin-Selectable PWM or Burst Mode®Operation

• Accurate, Independent RUN Pin Thresholds

• Up to 94% Efficiency

• VINand VOUTPower Good Indicators

• IQof 50μA in Sleep, 2μA in Shutdown

• 4mm × 5mm 24-Lead QFN or 28-Lead TSSOP Packages

Description

The LTC3118 is a dual-input, wide voltage range synchronous buck-boost DC/DC converter with an intelligent, integrated, low loss PowerPath 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 VINpriority modes, VINand VOUTpower good indicators, accurate RUN comparators 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 overload protection.The LTC3118 is offered in thermally enhanced 24-lead 4mm × 5mm QFN and 28-lead TSSOP packages.ApplicationsSystems with Multiple Input SourcesBack Up Power SystemsWall Adapter or Li-Ion(s) Input to 5VOUTBattery or Super Capacitor Input for Reserve PowerReplace Diode-OR Designs with Higher Efficiency, Flexibility and Performance