PENTIUM PROCESSOR
VOLTAGE REGULATOR MODULE
October 27, 1997
®
MP54C
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION:
The MP54C/MP55C series of power modules are low
noise (no EMI), economical 25W (nominal) linear
DC:DC converters with an integral connector con-
forming to Intel Corporation’s Voltage Regulator Mod-
ule specification for the Pentium
®
Processor.
Outstanding features include internal current limiting
and thermal shutdown, providing full device protection
against load faults and thermal overstress. The
MP54C series is designed to supply power for the
Pentium Processor P54C & P54CS and associated
chip sets. With a tightly controlled output voltage,
nominally 3.525V, the MP54C meets all requirements
for powering VRE specification processors.
The MP54C-5E is a reduced cost version offering a
maximum current of 5A. For P55C processors,
please see Semtech’s datasheet, MP55C.
FEATURES:
•
Integral VRM header connector
•
Input voltage 5V ± 5%
•
Fixed output voltage 3.525V for all Pentium
®
•
•
•
•
•
Processor variants (VRE or standard voltage)
Steady state output current 5.8A/7.5A peak
(MP54C-E) or 5A (MP54C-5E)
Low dropout voltage
Fast transient response
Low noise, no EMI
Fully qualified by Intel Corporation for Intel
Pentium
®
Processor P54C & P54CS 90 - 200MHz
module
APPLICATIONS:
•
Intel Pentium
®
Power Supply
ORDERING INFORMATION:
DEVICE
MP54C-E
MP54C-5E
Max Current (A)
7.5A
5.0A
Output Voltage (V)
3.525
3.525
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
(1)
Output Current (MP54C-E)
Output Current (MP54C-5E)
Line Regulation
(1)
Load Regulation
(1)
Dropout Voltage
Current Surge Limit (MP54C-E)
Current Surge Limit (MP54C-5E)
Quiescent Current
Temperature Coefficient
Temperature Stability
RMS Output Noise
(2)
Ripple Rejection Ratio
Linear Airflow Requirements
(ambient temperature 55°C)
SYMBOL
V
O
I
O
I
O
REG
(LINE)
REG
(LOAD)
V
D
I
S
I
S
I
Q
T
C
T
S
V
N
R
A
MIN
3.400
0.01
0.01
TYP
3.525
5.8
0.015
0.1
1.1
9.5
7.5
12
0.005
0.5
0.003
72
0.5
100
MAX
3.600
7.5
5.0
0.2
0.4
1.2
UNITS
V
A
A
%
%
V
A
A
mA
%/°C
%
%V
O
dB
m/s
ft/min
16
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) Bandwidth of 10 Hz to 10 kHz.
Pentium is a registered trademark of Intel Corporation
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PENTIUM PROCESSOR
VOLTAGE REGULATOR MODULE
October 27, 1997
INPUT AND OUTPUT CONNECTIONS
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Row A
V
SS
V
SS
ND
V
I/O
+3.3V
+3.3V
V
CORE
V
CORE
V
SS
V
CORE
PWR GOOD
SENSE
V
SS
+5.0V
+5.0V
Row B
V
SS
V
SS
V
I/O
V
I/O
+3.3V
+3.3V
V
CORE
V
CORE
V
CORE
V
CORE
UPVRM#
DISABLE
V
SS
+5.0V
+5.0V
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
End view of VRM connector
(viewed from motherboard side)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
VRM
PCB
A
B
®
MP54C
VOLTAGE REGULATOR MODULE CONNECTOR PIN REFERENCE
Pin Name
+3.3V
+5.0V
V
CORE
V
I/O
V
SS
DISABLE
PWR
GOOD
SENSE
UPVRM#
ND
I/O
Input
Input
Output
Output
Input
Input
Output
Input
Input
Function
+3.3V Supply
+5.0V Supply
Voltage Regulator Module Output
CPU I/O power connection. Allows for split voltage plane for I/O
circuitry.
Ground Reference
When driven high, this input will disable the Voltage Regulator Module
output and the output of the module will float.
Power Good is driven low when the VRM output is not within valid
levels.
Sense is provided for the regulator to correct for voltage drops across
the connector and motherboard powerplane.
This signal indicates to future upgrade processors that the proper
module is installed. This signal must be tied HIGH for this module.
This pin may be used as a +12V supply input, otherwise it should be
left as a no connect (NC)
Notes
Not connected
Input
Output
Tied to output
Ground
Not connected
Not connected
Not connected
Tied to output.
Not connected
Note:
The functions of DISABLE, SENSE, PWR_GOOD & UPVRM# are optional features specified by Intel. These
are not included in the standard Voltage Regulator Module.
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PENTIUM PROCESSOR
VOLTAGE REGULATOR MODULE
October 27, 1997
®
MP54C
MECHANICAL DIMENSIONS
Dimension
A
B
C
D
E
B
2
B
3
B
5
Inches
2.575
1.8
0.8
1.6
0.24
0.42
0.15
0.5
Millimeters
65.4
45.7
20.3
40.6
6.1
10.7
3.8
12.7
Component size and location for
illustration only
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
