LTM4611

RECOMMENDED FOR NEW DESIGNS

Ultralow VIN, 15A DC/DC μModule (Power Module) Regulator

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Overview

  • 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 LTM4611s 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

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 1.5VIN up to 5.5VIN. 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.

Applications

  • Telecom Servers and Networking Equipment
  • Storage and ATCA Cards
  • General Purpose Point of Load Regulation
LTM4611
Ultralow VIN, 15A DC/DC μModule (Power Module) Regulator
1.5VIN to 5.5VIN, 15A Step-Down DC/DC µModule® Regulator Efficiency vs Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 3

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Oscillators 1
LTC6909
PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Power System Management (PSM) & Sequencers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 1
LTC4365
RECOMMENDED FOR NEW DESIGNS Overvoltage, Undervoltage and Reverse Supply Protection Controller
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTM4611
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
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schematic 2
schematic 3
schematic 4
schematic 5
DC1588A

LTM4611EV Demo Board | 1.5V ≤ VIN ≤ 5.5V, VOUT = 0.8V to 5V @ 15A, DC/DC µModule Regulator

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Product Details

Demonstration circuit DC1588A features the LTM4611EV, a low input voltage 15A step-down power module. The operating input voltage range is 1.5V to 5.5V with an output voltage range from 0.8V to 5V. DC1588A can support a load current up to 15A, while derating may be necessary for different VIN, VOUT and thermal conditions. The LTM4611EV can operate in pulse-skipping mode or Burst Mode® operation for high efficiency under a light load. The DC1588A has a default programmable switching frequency of 500kHz and may be synchronized to an external clock from 360kHz up to 710kHz.
DC1588A
LTM4611EV Demo Board | 1.5V ≤ VIN ≤ 5.5V, VOUT = 0.8V to 5V @ 15A, DC/DC µModule Regulator
DC1588A Demo Board DC1588A Demo Board DC1587A Demo Board DC1588A Demo Board DC1588A - Schematic

Latest Discussions

7 Years Ago
Question about Heating / Radiant Heat condition of LTM4611
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