LAN8740A Datasheet, PDF (114/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

LAN8740A/LAN8740Ai
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
TABLE 5-2: CURRENT CONSUMPTION AND POWER DISSIPATION (REG. DISABLED)
Power Pin Group
nRESET
100BASE-TX /W TRAFFIC
(NO EEE)
10BASE-T /W TRAFFIC
100BASE-TX IDLE /W EEE
ENERGY DETECT
POWER DOWN
GENERAL POWER DOWN
Typical
Typical
Typical
Typical
Typical
Typical
3.3 V Device 1.2 V Device
Current (mA) Current (mA)
9.7
11
32
21
3.3 V Device
Current w/
Magnetics
(mA)
9.7
74
Total Device
Power (mW)
45
130
11
13
114
51
32
15
32
122
4.0
1.7
4.0
15
0.3
1.4
0.4
2.8
5.4.2 REGULATOR ENABLED
TABLE 5-3: CURRENT CONSUMPTION AND POWER DISSIPATION (REG. ENABLED)
Power Pin Group
nRESET
100BASE-TX /W TRAFFIC
(NO EEE)
10BASE-T /W TRAFFIC
100BASE-TX IDLE /W EEE
ENERGY DETECT
POWER DOWN
GENERAL POWER DOWN
Typical
Typical
Typical
Typical
Typical
Typical
Device Current (mA)
21
55
Device Current w/
Magnetics (mA)
21
97
25
129
48
48
7.1
7.1
4.0
4.0
Total Device Power
(mW)
70
180
82
158
24
13
DS00001987A-page 114
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