Datasheet Linear Technology LTM4611

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Design Notes

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  Step-Down uModule Regulator Produces 15A Output from Inputs Down to 1.5V &mdash DN488
  PDF, 1.1 Mb, File published: Jan 31, 2011
  Extract from the document

  Step-Down ВµModule Regulator Produces 15A Output from
  Inputs Down to 1.5V—No Bias Supply Required
  1.5V to 5.5V Input, 0.8V to 5V Output from a 15mm Г— 15mm Г— 4.32mm LGA Package
  Design Note 488
  Alan Chern and Jason Sekanina
  15A High Efficiency Output from a Low Input Voltage
  The LTMВ®4611 is a switch mode, step-down DC/DC ВµModule В®
  regulator in a compact 15mm Г— 15mm Г— 4.32mm LGA surface
  mount package. The switching controller, MOSFETs, inductor
  and supporting components are housed in the package. With
  a built-in differential remote sense amplifier, the LTM4611 can
  tightly regulate its output voltage from 0.8V to within 300mV of
  VIN and deliver 15A output efficiently from 1.5V to 5.5V input. VIN
  1.8V TO
  5.5V
  CSS
  0.1ВµF 680ВµF
  18mΩ ESR 2× 47µF
  RUN SGND QR code 03/11/488 Download a QR code reader application to scan
  and read QR codes from your phone. GND VOSNS+
  VOSNS–
  RSET
  69kΩ Figure 1. 1.8VIN to 5.5VIN to 1.5VOUT …

Articles

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  POL uModule DC/DC Converter Operates from Inputs Down to 1.5V, Delivering Up to 15A Output, Without an Auxiliary Bias Supply &mdash LT Journal
  PDF, 986 Kb, File published: Oct 27, 2010
  Extract from the document

  POL ВµModule DC/DC Converter Operates from Inputs Down
  to 1.5V, Delivering Up to 15A Output, Without an Auxiliary
  Bias Supply
  Jason Sekanina and Alan Chern The LTM4611 is a low profile ВµModule step-down switch mode DC/DC converter in a
  compact 15mm Г— 15mm Г— 4.32mm LGA surface mount package. The switching controller,
  MOSFETs, inductor and support components are housed in the package, so design is
  reduced to selecting a few external components. The LTM4611 operates from an input
  voltage of 1.5V to 5.5V (6V, absolute maximum), making it suitable for a variety of power
  architectures—particularly data storage and RAID (redundant array of independent disks)
  systems, ATCA (advanced telecommunications computing architecture) and networking
  cards—where one or several commonly bussed voltages are 5V, 3.3V, 2.8V, and/or 2.5V.
  While it is uncommon to see bus voltages
  lower than 2.5V due to the distribution
  losses (voltage drops) associated with
  relatively high bus currents, the ability
  of the LTMВ®4611 to deliver full power to
  its load from a 1.5V input is particularly
  advantageous in applications where load
  voltage(s) must be precisely regulated
  even as momentary or sustained electrical events induce input-bus line-sag.
  Transient events on the system bus can
  occur normally due to the operation of
  motors, transducers, defibrillators or an …

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Manufacturer's Classification

• µModule Solutions > µModule Regulators > µModule Buck Regulators