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Spartan-3 / XC3S Series


Power Requirements | Reference Designs | Resources


Power Requirements for Spartan-3 / XC3S
  Pin Name Voltage (V) Imax* Tolerance Sequencing Order Timing Delay
Device (mA)
Core Vccint 1.2 XC3S50
XC3S200
XC3S400
XC3S1000
XC3S1500
XC3S2000
XC3S4000
XC3S5000 		250
500
750
1500
2000
3000
5000
6000 		±5% 1
I/O Vcco 1.2 / 1.5 / 1.8 / 2.5 / 3.3 XC3S50
XC3S200
XC3S400
XC3S1000
XC3S1500
XC3S2000
XC3S4000
XC3S5000 		2000
2000
2000
3000
3000
3000
4000
5000 		±5% 1 Revs A to D require Vcco > 2.0ms. No requirement exists for Rev E. Power on Vccaux before or on with Vccint.
I/O Vccaux 2.5 XC3S50
XC3S200
XC3S400
XC3S1000
XC3S1500
XC3S2000
XC3S4000
XC3S5000 		150
150
150
300
300
300
300
300

*Note: The Imax value shown above table is the maximum value when the desired FPGA is used in the majority of applications. There may be cases in which the required current is higher or lower depending on your clock frequencies and your particular usage case. For your exact current requirements, go to the power estimator spreadsheet for your FPGA.

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Reference Designs for Spartan-3 / XC3S
Name File Name/Size Date Download
3.3V Input
TPS75003 EVM: Modified for 3.3-V Input Voltage slvr283.pdf, 70KB 08 Apr 2005
Dual LDO for Small Power Solution slva175.pdf, 89KB 28 Feb 2005
3-A, 3.3-V Input Voltage High Efficiency Integrated Power Solution slvr281.pdf, 82KB 08 Apr 2005
5V Input
Switching DC/DC Controller slva174.pdf, 105KB 28 Feb 2005
Single-Channel LDO slva176.pdf, 103KB 28 Feb 2005
Switching DC/DC Converter with Integraged FETs - 6A slva177.pdf, 113KB 28 Feb 2005
Switching DC/DC Converter with Integraged FETs - 1.5-A slvr243.pdf, 74KB 04 Mar 2005
TPS75003 EVM: 2-A, 5-V Input Voltage High Efficiency Integrated Power Solution slvu116.pdf, 367KB 27 May 2007
TPS75003 EVM: Modified for Lower Component Cost slvr274.pdf, 71KB 08 Apr 2005
TPS75003 EVM: Modified for Voltage Supply Sequencing to Address Errata (See Note Below) slvr273.pdf, 73KB 08 Apr 2005
TPS75003 EVM: Modified for Voltage Supply Sequencing to Address Errata (See Note Below) slvr282.pdf, 63KB 08 Apr 2005
3-A, 5-V Input Voltage High Efficiency Integrated Power Solution slvr275.pdf, 80KB 08 Apr 2005
1-A, 5-V Input Voltage High Efficiency Integrated Power Solution slvr286.pdf, 64KB 09 Jun 2005

Note: Unless otherwise noted, these reference designs are tested to meet the specs given in the above power specification table.

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Resources for Spartan-3 / XC3S

  • Spartan-3 FPGA Family Data Sheet (ds099.pdf, )
    Download
  • Power Distribution System (PDS) Design: Using Bypass/Decoupling Capacitors (xapp623.pdf, 146KB )
    Download
  • Spartan-3 Starter Kit Board User Guide (ug130.pdf, 555KB )
    Download
  • Using 3.3-V Signals for Spartan-3 Configuration and JTAG Ports (slva159a.pdf, 41KB )
    Download

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Selection & Solution Guides   

  • Power Management Selection Guide (Rev. H) (slvt145h.pdf, 4.83 MB)
    11 Apr 2008 Download
  • LED Reference Design Cookbook (slyt349.pdf, 2.77 MB)
    Download
  • Battery Charger Catalog 3Q 2008 (slym069.pdf, 1.87 MB)
    Download