LTC3113IDHD#TRPBF

A wide VIN range, highly efficient, fixed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides low noise operation, making it well suited for RF and precision measurement applications. It can deliver up to 3A of continuous output current to satisfy the most demanding applications. Higher output current is possible in stepdown (buck) mode. Integrated low RDS(ON) power MOSFETs and a programmable switching frequency up to 2MHz result in a compact solution footprint. Selectable Burst Mode operation improves efficiency at light loads. Other features include <1μA shutdown current, integrated soft-start, short-circuit protection, current limit and thermal overload protection. It is housed in the thermally enhanced 16-lead (4mm×5mm×0.75mm) DFN and 20-lead TSSOP packages.

Applications

• Wireless Modems
• Backup Power Systems
• Portable Inventory Terminals
• Portable Barcode Readers
• Portable Instrumentation

Key features

• Regulated Output with Input Voltage Above, Below or Equal to the Output Voltage
• 1.81 to 5.5V Input and Output Voltage Range
• 3A Continuous Output Current VIN>3.0V, VOUT=3.8V
• 1.5A Continuous Output Current for VIN≥1.8V, VOUT=3.3V
• Single Inductor
• Low Noise Buck-Boost Architecture
• Up to 96% Efficiency
• Programmable Frequency from 300kHz to 2MHz
• Selectable Burst Mode Operation
• Output Disconnect in Shutdown
• Shutdown Current: <1μA
• Internal Soft-Start
• Small, Thermally Enhanced 16-Lead (4mm×5mm×0.75mm) DFN Package and 20-Lead TSSOP Package