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器件3D模型￥ 72.479
EP1C4F400C8N 数据手册 - Altera（阿尔特拉）
制造商:
Altera（阿尔特拉）
分类:
FPGA芯片
封装:
FBGA-400
描述:
可编程逻辑器件(CPLD/FPGA) EP1C4F400C8N FBGA-400
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P162P314P317P377Hot
典型应用电路图在P25P27P29P31P255P273
原理图在P22P141P341
封装尺寸在P12P117P377P383P384
型号编码规则在P11P117
功能描述在P21P148P149P150P152P336P338P340
技术参数、封装参数在P85P86P87P88P89P90P94P113P114P142P224P225
应用领域在P102P203P228
电气规格在P225
导航目录
EP1C4F400C8N数据手册
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Altera Corporation 12–19
May 2008 Preliminary
1.5-V Regulator Application Examples
1.5-V Regulator
Application
Examples
The following sections show the process used to select a voltage regulator
for three sample designs. The regulator selection is based on the amount
of power that the Cyclone device consumes. There are 14 variables to
consider when selecting a voltage regulator. The following variables
apply to Cyclone device power consumption:
■ f
MAX
■ Output and bidirectional pins
■ Average toggle rate for I/O pins (tog
IO
)
■ Average toggle rate for logic elements (LEs) (tog
LC
)
■ User-mode I
CC
consumption
■ Maximum power-up I
CCINT
requirement
■ Utilization
■ V
CCIO
supply level
■ V
CCINT
supply level
The following variables apply to the voltage regulator:
■ Output voltage precision requirement
■ Supply voltage on the board
■ Voltage supply output current
■ Variance of board supply
■ Efficiency
Different designs have different power consumptions based on the
variables listed. Once you calculate the Cyclone device’s power
consumption, you must consider how much current the Cyclone device
needs. You can use the Cyclone power calculator (available at
www.altera.com) or the PowerGauge
TM
tool in the Quartus II software to
determine the current needs. Also check the maximum power-up current
requirement listed in the Power Consumption section of the Cyclone
FPGA Family Data Sheet because the power-up current requirement may
exceed the user-mode current consumption for a specific design.
Once you determine the minimum current the Cyclone device requires,
you must select a voltage regulator that can generate the desired output
current with the voltage and current supply that is available on the board
using the variables listed in this section. An example is shown to illustrate
the voltage regulator selection process.
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