Features

• Regulated Output with Input Voltage Above, Below or Equal to the Output Voltage
• 1.8V to 5.5V Input and Output Voltage Range
• 3A Continuous Output Current V_IN > 3.0V, V_OUT = 3.8V
• 1.5A Continuous Output Current for V_IN ≥ 1.8V, V_OUT = 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

Typical Application

Description

The LTC3113 is a wide V_IN 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.

The LTC3113 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 R_DS(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. The LTC3113 is housed in the thermally enhanced 16-lead (4mm × 5mm × 0.75mm) DFN and 20-lead TSSOP packages.