Datasheet

LAN8740A/LAN8740Ai
DS00001987A-page 114  2013-2015 Microchip Technology Inc.
5.4 Power Consumption
This section details the device power measurements taken over various operating conditions. Unless otherwise noted,
all measurements were taken with power supplies at nominal values (VDDIO, VDD1A, VDD2A = 3.3 V, VDDCR = 1.2 V).
See Section 3.8.3, "Power-Down Modes" for a description of the power down modes.
5.4.1 REGULATOR DISABLED
5.4.2 REGULATOR ENABLED
TABLE 5-2: CURRENT CONSUMPTION AND POWER DISSIPATION (REG. DISABLED)
Power Pin Group
3.3 V Device
Current (mA)
1.2 V Device
Current (mA)
3.3 V Device
Current w/
Magnetics
(mA)
Total Device
Power (mW)
nRESET
Typical 9.7 11 9.7 45
100BASE-TX /W TRAFFIC
(NO EEE)
Typical 32 21 74 130
10BASE-T /W TRAFFIC
Typical 11 13 114 51
100BASE-TX IDLE /W EEE
Typical 32 15 32 122
ENERGY DETECT
POWER DOWN
Typical 4.0 1.7 4.0 15
GENERAL POWER DOWN
Typical 0.3 1.4 0.4 2.8
TABLE 5-3: CURRENT CONSUMPTION AND POWER DISSIPATION (REG. ENABLED)
Power Pin Group Device Current (mA)
Device Current w/
Magnetics (mA)
Total Device Power
(mW)
nRESET
Typical 21 21 70
100BASE-TX /W TRAFFIC
(NO EEE)
Typical 55 97 180
10BASE-T /W TRAFFIC
Typical 25 129 82
100BASE-TX IDLE /W EEE
Typical 48 48 158
ENERGY DETECT
POWER DOWN
Typical 7.1 7.1 24
GENERAL POWER DOWN
Typical 4.0 4.0 13