Specifications

E PENTIUM® PRO PROCESSOR AT 150, 166, 180, and 200 MHz
89
Table 34. OverDrive
®
VRM Specifications
Symbol Parameter Min Max Unit Notes
V
IL
Control Signal Input Low Voltage -0.3 0.8 V
V
IH
Control Signal Input High Voltage 2.0 V
CC
5+0.3 V
V
OL
Control Signal Output Low Voltage 0.4V V
V
OH
5 Control Signal Output High Voltage 2.4 V
CC
5+0.3 V PWRGOOD
I
CC
5 5.0 V Power Supply Current
(VRM input current)
0.100 7.0
7.8
8.7
A
A
A
1
2
3
I
CC
12 12.0 V Power Supply Current
(VRM input current)
150 mA
I
OUT
VRM Output Current 11.2
12.5
13.9
A
A
A
1
2
3
L
MB
Total inductance between VRM
output and processor pins
2.5 nH
R
MB
Total resistance between VRM
output and processor pins
2.1 mΩ 4
di
CC
/dt Worst Case Input (I
CC
5) Load
Change
100 mA/
µS
T
VOUT
Valid Input Supply to Output Delay 10 ms
NOTES:
1. This specification applies to the future OverDrive
®
VRM for 150 MHz Pentium
®
Pro processor-based systems.
2. This specification applies to the future OverDrive VRM for 166 and 180 MHz Pentium Pro processor-based systems.
3. This specification applies to the future OverDrive VRM for 200 MHz Pentium Pro processor-based systems.
4. Maximum total resistance from VRM output to CPU pins cannot exceed 2.1 mΩ. For example, a breakdown of the
resistive path might be 0.45 mΩ for VRM header, 1.0 mΩ for motherboard power plane resistance, and 0.65 mΩ for ZIF
socket.
8.4.2. OverDrive
®
PROCESSOR
DECOUPLING REQUIREMENTS
No additional decoupling capacitance is required to
support the OverDrive processor beyond what is
necessary for the Pentium Pro processor. Any
incremental decoupling, both bulk and high speed,
required by the OverDrive processor will be provided
on the processor package. It is strongly
recommended that liberal, low inductance decoupling
capacitance be placed near Socket 8 following the
guidelines in Note 1 of Table 4 and the AP-523,
Pentium® Pro Processor Power Distribution
Guidelines
Application Note (Order Number 242764).
Capacitor values should be chosen to ensure they
eliminate both low and high frequency noise
components.
8.4.3. AC SPECIFICATIONS
Except for internal CPU core Clock frequency, the
OverDrive processor will operate within the same AC
specifications as the Pentium Pro processor.