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• Descargar
  High Performance Switch Mode Power Solutions for Altera Low Voltage FPGAs &mdash Design Solutions 43
  PDF, 158 Kb, Archivo publicado: jun 1, 2004
  Extracto del documento

  Design Solutions 43
  June 2004
  High Performance Switch Mode Power Solutions
  for Altera Low Voltage FPGAs
  by Mike Shriver
  INTRODUCTION
  The core voltages for FPGAs are moving lower as a result
  of advances in the fabrication process. The newest FPGA
  family from Altera, the StratixВ® II, now requires a core
  voltage of 1.2V and the Stratix, Stratix GX, HardCopyВ®
  Stratix and CycloneTM families require a core voltage of
  1.5V. This article discusses how to power the core and I/O
  of low voltage FPGAs using the latest step-down switch
  mode controllers from Linear Technology Corporation.
  To ensure correct selection of power management circuitry,
  it is recommended to use Altera’s PowerPlay Power Estimation Tools to obtain accurate results. Tools are available
  to help determine power consumption before and during
  the design process. More information on these tools is
  available from Altera’s website: http://www.altera.com/
  support/devices/estimator/pow-powerplay.html.
  Overview
  The load and input voltage requirements for FPGA systems vary considerably. A single FPGA typically requires
  less than 2A, but for systems using multiple FPGAs, the …

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  3A, 2MHz Monolithic Synchronous Step-Down Regulator Provides a Compact Solution for DDR Memory Termination &mdash DN309
  PDF, 75 Kb, Archivo publicado: abr 3, 2003
  Extracto del documento

  advertisement 3A, 2MHz Monolithic Synchronous Step-Down Regulator Provides
  a Compact Solution for DDR Memory Termination – Design Note 309
  Joey M. Esteves
  Introduction
  The LTC В®3413 is a monolithic synchronous, step-down
  switching regulator that is capable of generating a bus
  termination voltage for DDR/DDR2 memory applications. While sourcing and sinking up to 3A of current,
  the LTC3413 allows switching frequencies as high as
  2MHz. Increasing the switching frequency makes compact solutions possible by allowing the use of smaller
  inductors and capacitors. The internal power switches
  have a mere 85mО© of on-resistance making it possible
  to achieve efficiencies as high as 90% while generating
  an output voltage as low as 0.6V. For improved thermal
  handling, the LTC3413 is offered in a 16-Lead TSSOP
  package with an exposed pad.
  The LTC3413 utilizes a constant frequency, current
  mode architecture that operates from an input voltage
  range of 2.25V to 5.5V and provides a regulated output
  voltage equal to VREF/2. The switching frequency can
  be set between 300kHz to 2MHz by a single external
  VIN
  2.5V 1 PGOOD
  RITH …

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• Power Management > Switching Regulator > DDR Memory/Bus Termination