LAN9221_12 Datasheet, PDF (142/151 Pages) SMSC Corporation – High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O

High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
7.5
Worst Case Current Consumption
This section details the worst case current consumption for each device power supply. These values
are provided to assist system designers with proper power supply design. These values cannot be
used to determine typical power consumption of the device. The maximum supply current for each
power supply is provided for the maximum VDDVARIO voltage in all supported ranges as detailed in
Table 7.3, Table 7.4, and Table 7.5.
Note: The current measurements listed below were taken under the following conditions:
Temperature: ................................................................................................................................ Note 7.6
Device VDD (VDDVARIO, VDD33REG, VDD33A): .................................................................... Note 7.7
Note: Current consumption is determined by operating frequency, temperature, and supply voltage,
as well as external source/sink requirements.
Note 7.6 0^oC to +70^oC for commercial version, -40^oC to +85^oC for industrial version.
Note 7.7 The device VDD voltage levels are indicated in the supply current tables below.
Table 7.3 Maximum Supply Current Characteristics VDDVARIO=3.3V + 300mV
PARAMETER
Variable Voltage Supply Current
+3.3V Regulator Supply Current
+3.3V Analog Supply Current
SUPPLY NAME
VDDVARIO
VDD33REG
VDD33A
SUPPLY VOLTAGE MAX CURRENT
3.6V
12
3.6V
85
3.6V
48
UNITS
mA
mA
mA
Table 7.4 Maximum Supply Current Characteristics VDDVARIO=2.5V + 10%
PARAMETER
Variable Voltage Supply Current
+3.3V Regulator Supply Current
+3.3V Analog Supply Current
SUPPLY NAME
VDDVARIO
VDD33REG
VDD33A
SUPPLY VOLTAGE MAX CURRENT
2.75V
9
3.6V
85
3.6V
48
UNITS
mA
mA
mA
Table 7.5 Maximum Supply Current Characteristics VDDVARIO=1.8V + 10%
PARAMETER
Variable Voltage Supply Current
+3.3V Regulator Supply Current
+3.3V Analog Supply Current
SUPPLY NAME
VDDVARIO
VDD33REG
VDD33A
SUPPLY VOLTAGE MAX CURRENT
1.98V
7
3.6V
85
3.6V
48
UNITS
mA
mA
mA
Note: Above values do not include the supply current for the magnetics. Based on the recommended
implementation, the maximum supply current needed for the magnetics is 108mA.
Revision 2.9 (03-01-12)
142
DATASHEET
SMSC LAN9221/LAN9221i