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Design Notes

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  Dual Output DC/DC Converter Solutions for Xilinx FPGA Based Systems &mdash Design Solutions 41
  PDF, 183 Кб, Файл опубликован: 1 фев 2004
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  Design Solutions 41
  February 2004
  Dual Output DC/DC Converter Solutions
  for Xilinx FPGA Based Systems
  Charlie Zhao
  INTRODUCTION
  Xilinx FPGAs require at least two power supplies: VCCINT
  for core circuitry and VCCO for I/O interface. For the latest
  Xilinx FPGAs, including Virtex-II Pro, Virtex-II and Spartan-3, a third auxiliary supply, VCCAUX may be needed. In
  most cases, VCCAUX can share a power supply with VCCO.
  The core voltages, VCCINT, for most Xilinx FPGAs, range
  from 1.2V to 2.5V. Some mature products have 3V, 3.3V
  or 5V core voltages. Table 1 shows the core voltage
  requirement for most of the FPGA device families. Typical
  I/O voltages (VCCO) vary from 1.2V to 3.3V. The auxiliary
  voltage VCCAUX is 2.5V for Virtex-II Pro and Spartan-3, and
  is 3.3V for Virtex-II.
  Each FPGA family has a specific quiescent supply current,
  ranging from under 100mA to about 2A. For applications
  with multiple FPGAs, the core supply current can be higher
  than 10A.
  With multiple voltage rails in today’s systems (FPGA, DDR
  memory, data converter ICs, etc.), supply sequencing and …

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  High Performance Switch Mode Power Solutions for Altera Low Voltage FPGAs &mdash Design Solutions 43
  PDF, 158 Кб, Файл опубликован: 1 июн 2004
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  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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Классификация производителя

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | External Power Switch Buck Controllers