PENTIUM PROCESSOR P55C
VOLTAGE REGULATOR MODULE
October 27, 1997
廬
MP55C
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 linear DC:DC converters
with an integral connector conforming to Intel Corpora-
tion鈥檚 Voltage Regulator Module specification for the
Pentium
廬
Processor.
Outstanding features include internal current limiting
and thermal shutdown, providing full device protection
against load faults and thermal overstress. The MP55C
is designed to power split voltage plane microproces-
sors requiring 3.3V V
I/O
and 2.xV V
CORE
. The V
I/O
is al-
ways supplied directly from a 3.3V input; either the
main system power supply or a low dropout regulator
on the motherboard. The CPU core can be supplied
either from the 3.3V main supply to reduce heat dissi-
pation (MP55C-3.3) or the 5V main power supply
(MP55C-5). The MP55C-3.3 still requires a few mA of
5V power for control circuitry. The MP55C-3.3 will not
be available for CPU core voltages higher than 2.8V.
Please contact Semtech for availability.
FEATURES:
鈥?/div>
Integral VRM header connector
鈥?/div>
Input voltage 5V 鹵 5%
鈥?/div>
2.8 鹵 0.1V output for CPU core power
鈥?/div>
3.3V passes through the I/O power plane
鈥?/div>
Maximum output current 6A
鈥?/div>
Input power voltage:
鈥?/div>
5V 鹵 5% for MP55C-5 or
3.3V for MP55C-3.3
Low noise, no EMI
ORDERING INFORMATION:
DEVICE
MP55C-5-2.8
MP55C-5-2.5
MP55C-3.3-2.8
MP55C-3.3-2.7
MP55C-3.3-2.5
Input (V)
5.0
5.0
3.3
3.3
3.3
Output (V)
2.8
2.5
2.8
2.7
2.5
APPLICATIONS:
鈥?/div>
Pentium
廬
Processor P55C, Cyrix 6x86 and
AMD5
K
86 power supplies
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
(1)
2.8V version
2.7V version
2.5V version
SYMBOL
V
O
MIN
2.7
2.6
2.4
TYP
2.8
2.7
2.5
0.015
0.1
1.2
0.40
7.5
12
0.005
0.5
0.003
72
0.5
100
MAX
3.0
2.8
2.6
6.0
0.2
0.4
1.3
UNITS
V
Output Current
Line Regulation
(1)
Load Regulation
(1)
Dropout voltage
Current Surge Limit
Quiescent Current
Temperature Coefficient
Temperature Stability
RMS Output Noise
(2)
Ripple Rejection Ratio
Linear Airflow Requirements
(ambient temperature 55擄C)
(MP55C-5)
(MP55C-3.3)
I
O
REG
(LINE)
REG
(LOAD)
V
D
I
S
I
Q
T
C
T
S
V
N
R
A
A
%
%
V
A
mA
%/擄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. AMD5
K
86 is a trademark of Advanced Micro Devices. 6x86 is a trademark of Cyrix.
漏 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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