LAN8810 Datasheet, PDF (61/83 Pages) Microchip Technology – GMII 10/100/1000 Ethernet Transceiver

LAN8810/LAN8810I
5.3 Power Consumption
This section details the power consumption of the device as measured during various modes of operation. Power con-
sumption values are provided for both the device-only, and for the device plus Ethernet components. Power dissipation
is impacted by temperature, supply voltage, and external source/sink requirements. All measurements were taken at
+25C.
TABLE 5-1: POWER CONSUMPTION - 1000BASE-T LINKED
Parameter
Typical
Unit
Supply Current (VDDVARIO) (@ +3.3V)
36
mA
Supply Current (VDD12CORE, VDD12BIAS, VDD12PLL, VDD12A) (@ +1.2V)
454
mA
External Magnetics Current (@ +3.3V)
202
mA
Total Power Dissipation (Device Only) (Note 5-5)
665
mW
Total Power Dissipation (Device and Ethernet components) (Note 5-5)
1331
mW
Note 5-5
When the external magnetics operate at +2.5V, current consumption remains the same. However,
Ethernet component power consumption will be reduced accordingly.
TABLE 5-2: POWER CONSUMPTION - 100BASE-TX LINKED
Parameter
Typical
Unit
Supply Current (VDDVARIO) (@ +3.3V)
24
mA
Supply Current (VDD12CORE, VDD12BIAS, VDD12PLL, VDD12A) (@ +1.2V)
82
mA
External Magnetics Current (@ +3.3V)
63
mA
Total Power Dissipation (Device Only) (Note 5-6)
177
mW
Total Power Dissipation (Device and Ethernet components) (Note 5-6)
385
mW
Note 5-6
When the external magnetics operate at +2.5V, current consumption remains the same. However,
Ethernet component power consumption will be reduced accordingly.
TABLE 5-3: POWER CONSUMPTION - 10BASE-T LINKED
Parameter
Typical
Unit
Supply Current (VDDVARIO) (@ +3.3V)
21
mA
Supply Current (VDD12CORE, VDD12BIAS, VDD12PLL, VDD12A) (@ +1.2V)
32
mA
External Magnetics Current (@ +3.3V)
123
mA
Total Power Dissipation (Device Only) (Note 5-7)
107
mW
Total Power Dissipation (Device and Ethernet components) (Note 5-7)
513
mW
Note 5-7
When the external magnetics operate at +2.5V, current consumption remains the same. However,
Ethernet component power consumption will be reduced accordingly.
DS00001870B-page 61
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