82573 Datasheet, PDF (25/39 Pages) Intel Corporation – GbE Controllers

Datasheet—82573
Figure 4. 82573 2.5V and 1.2V LVR Schematic
2.5V Voltage Regulator
Install when using the
Integrated 2.5V Voltage
Regulator with External
Pass Transistor. Do not
install if on-die 2.5V
regulator is used.
Q3 Requires Heat-
Sink surface pad of
0.5'' x 0.5'' min.
1 ohm is not needed for R60 for 82573L.
0 ohm may be used instead. 82573L only
designs may connect C23 directly to 2.5V.
Intel recommends using
40uF at the emitter of Q3
on the 3.3V rail.
Use ceramic capacitors.
1.2V Voltage Regulator
Q4 Requires Heat-Sink surface
pad of 0.5'' x 0.5'' min.
Intel recommends using
40uF at the emitter of Q4
on the 3.3V rail.
Use ceramic capacitors.
1 ohm is not needed for R61 for 82573L.
0 ohm may be used instead. 82573L only
designs can connect C29 directly to 1.2V.
3.4
DC and AC Specifications
Table 11.
82573E and 82573V Maximum Measured External Power Characteristics¹
System
State
Link State
82573E Power (mW) 82573V Power (mW)
with Intel® AMT
without Intel® AMT
1000 Mbps Active
S0
(Maximum Power)
1548
1426
1. Maximum conditions refer to fast silicon, high temperature and nominal VCC.
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