Features

• Complete Switch Mode Power Supply
• Input Voltage Range: 1.5V to 5.5V
• 15A DC Output
• Output Voltage Range: 0.8V to 5V
• ±1.5% Total DC Output Error
• Differential Remote Sensing for Precision Regulation
• Current Mode Control/ Fast Transient Response
• Overcurrent Foldback Protection
• Parallel Multiple LTM®4611s for Current Sharing
• Frequency Synchronization
• Selectable Pulse-Skipping or Burst Mode® Operation
• Soft-Start/Voltage Tracking
• Up to 94% Efficiency
• Output Overvoltage Protection
• Small 15mm × 15mm × 4.32mm LGA Package

Typical Application

Description

The LTM4611 is a high density 15A output, switch mode DC/DC buck converter power supply capable of operating from very low voltage input supplies. Included in the package are the buck switching controller, power FETs, inductor and loop-compensation components. The LTM4611 delivers up to 15A continuous current at high efficiency from an input voltage of 1.5V_IN up to 5.5V_IN. The output voltage is set between 0.8V and 5V by a resistor. Only a few input and output capacitors are needed.

High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, multiphase/current sharing operation, Burst Mode operation and output voltage tracking for supply rail sequencing.

The LTM4611 is available in a thermally enhanced 15mm × 15mm × 4.32mm LGA package. The LTM4611 is PB-free and RoHS compliant.