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Application Guide: Intersil Solutions for Precise Power Delivery to
AlteraŽ FPGAs, CPLDs and ASICs
2008
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Intersil's Family of Integrated FET Regulators:
EL7566:
Monolithic 6A DC/DC Step-Down Regulator |
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ISL65426: 6A Dual Synchronous Buck
Regulator with Integrated MOSFETs |
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ISL6521: PWM Buck DC/DC and Triple
Linear Power Controller |
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ISL644x: Step-Down PWM Controllers |
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ISL6420A: PWM Controller with Wide VIN,
Start-Up into Pre-Bias Load |
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ISL8102: Two-Phase Buck PWM Controller
with High Current Integrated MOSFET Drivers |
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Intersil Power Management Solutions for
Altera FPGAs, CPLDs and ASICs |
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Core Voltage/Power
In large FPGAs/CPLDs/ASICs, the logic core generally has
the most demanding current requirements, up to tens of
amps depending on the number of gates being used and the
clock frequency. Designated VCCINT by Altera, by platform
the voltage required is listed in the table below.
| Altera Devices |
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| VCCINT |
1.2/1.5V |
0.9/1.1/1.2/1.5V |
0.9/1.2/1.5V |
1.2V |
2.5/3.3/5V |
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I/O Voltage/Power
Designated VCCIO/VCCO and equal to 1.2V, 1.5V, 1.8V, 2.5V,
3V, 3.3V or 5V depending on the I/O standard selected. I/O
standards can be set independently by block in the FPGA/CPLD/ASIC, so more than one I/O voltage for a single FPGA/CPLD/ASIC is possible.
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Altera, the stylized Altera logo, Cyclone, the stylized Cyclone logo, Stratix, the stylized Stratix logo, Arria, the
stylized Arria logo, MAX, the stylized MAX logo, HardCopy and the stylized HardCopy logo are the trademarks of Altera Corporation in the U.S. and other
countries.
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