82567 Datasheet, PDF (25/33 Pages) Intel Corporation – GbE Physical Layer Transceiver (PHY)

Datasheet—82567
4.7.2
4.7.3
The 1.05 V Rail
The 1.05 V power delivery system supports a load of 300 mA.
The 1.05 V rail can be supplied in one of three ways:
• An external power supply that is not dependent on support from the 82567. For
example, the platform designer might choose to route a platform-available 1.05 V
supply to the 82567.
• A fully integrated on-die LVR solution.
• A discrete LVR solution, where the base current of PNP power transistor is driven by
the 82567, while the power transistor is placed externally.
• A discrete Switched Voltage Regulator (SVR) solution.
Voltage Regulator Schematics
Schematics for 82567 power delivery using integrated and discrete LVRs are included in
the reference schematics (titled 82567_Gigabit_Ethernet_PHY_Reference_Schematics)
4.7.4
4.7.4.1
Voltage Regulator Power Supply Specifications
3.3 V Rail
4.7.4.2
Title
Rise Time
Monotonicity
Slope
Operational
Range
Ripple
Overshoot
Capacitance
Description
Time from 10% to 90% mark
Voltage dip allowed in ramp
Ramp rate at any given time between 10% and 90%
Voltage range for normal operating conditions
Maximum voltage ripple @ BW = 50MHz
Maximum voltage allowed
Minimum capacitance
Min
1
3
25
Max
100
0
28800
3.6
70
4
1.8 V-1.9 V Rail
Units
ms
mV
V/s
V
mV
V
uF
Title
Rise Time
Monotonicity
Slope
Operational
Range
Ripple
Overshoot
Output
Capacitance
Description
Time from 10% to 90% mark
Voltage dip allowed in ramp
Ramp rate at any given time between 10% and 90%
Voltage range for normal operating condtions
Maximum voltage ripple @ BW = 50MHz
Maximum voltage allowed
Capacitance range when using PNP circuit
Min
1
1.71
20
Max
100
0
1440
2.015
50
2.7
40
Units
ms
mV
V/s
V
mV
V
uF
25