Datasheet MP54C-E, MP54C-5E Datasheet (Semtech Corporation)

© 1997 SEMTECH CORP.

PENTIUM

652 MITCHELL ROAD NEWBURY PARK CA 91320

®

PROCESSOR

VOLTAGE REGULATOR MODULE

MP54C

October 27, 1997

TEL:[phone] FAX:[phone] 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 con­forming to Intel Corporation’s Voltage Regulator Mod­ule specification for the Pentium

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.

®

Processor.

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 Max Current (A) Output Voltage (V)

MP54C-E 7.5A 3.525
MP54C-5E 5.0A 3.525

ELECTRICAL CHARACTERISTICS

PARAMETER SYMBOL MIN TYP MAX UNITS

Output Voltage
Output Current (MP54C-E) I
Output Current (MP54C-5E) I
Line Regulation
Load Regulation
Dropout Voltage V
Current Surge Limit (MP54C-E) I
Current Surge Limit (MP54C-5E) I
Quiescent Current I
Temperature Coefficient T
Temperature Stability T
RMS Output Noise
Ripple Rejection Ratio R
Linear Airflow Requirements

(ambient temperature 55°C)

NOTES:

(1) Low duty cycle pulse testing with Kelvin connections required.
(2) Bandwidth of 10 Hz to 10 kHz.

(1)

(1)

(1)

(2)

REG

REG

V

O
O

S
S
Q

V

O

(LINE)
(LOAD)
D

C
S
N

A

3.400 3.525 3.600 V

0.01 5.8 7.5 A

0.01 5.0 A

0.015 0.2 %

0.1 0.4 %

1.1 1.2 V

9.5 A

7.5 A
12 16 mA

0.005 %/°C

0.5 %

0.003 %V
72 dB

0.5

100

m/s

ft/min

O

Pentium is a registered trademark of Intel Corporation

© 1997 SEMTECH CORP.

October 27, 1997

652 MITCHELL ROAD NEWBURY PARK CA 91320

PENTIUM

®

PROCESSOR

VOLTAGE REGULATOR MODULE

MP54C

INPUT AND OUTPUT CONNECTIONS

Pin No. Row A Row B Pin No.

1 V
2 V

SS

SS

3 ND V
4 V

I/O

V

SS

V

SS

I/O

V

I/O

1
2
3

4

5 +3.3V +3.3V 5
6 +3.3V +3.3V 6

7 V
8 V
9 V

10 V

CORE

CORE

SS

CORE

V
V
V
V

CORE

CORE

CORE

CORE

7
8
9

10

11 PWR GOOD UPVRM# 11
12 SENSE DISABLE 12
13 V

SS

V

SS

13
14 +5.0V +5.0V 14
15 +5.0V +5.0V 15

A B
15
14
13
12
11
10

9
8
7
6
5
4
3
2

VRM
PCB

1

End view of VRM connector
(viewed from motherboard side)

VOLTAGE REGULATOR MODULE CONNECTOR PIN REFERENCE

Pin Name I/O Function Notes

+3.3V Input +3.3V Supply Not connected
+5.0V Input +5.0V Supply Input
V

CORE

V

I/O

V

SS

DISABLE Input When driven high, this input will disable the Voltage Regulator Module
PWR

GOOD
SENSE Input Sense is provided for the regulator to correct for voltage drops across

UPVRM# Input This signal indicates to future upgrade processors that the proper
ND This pin may be used as a +12V supply input, otherwise it should be

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.

Output Voltage Regulator Module Output Output
Output CPU I/O power connection. Allows for split voltage plane for I/O

Tied to output

circuitry.

Input Ground Reference Ground

Not connected

output and the output of the module will float.

Output Power Good is driven low when the VRM output is not within valid

Not connected

levels.

Not connected

the connector and motherboard powerplane.

Tied to output.

module is installed. This signal must be tied HIGH for this module.

Not connected

left as a no connect (NC)

© 1997 SEMTECH CORP.

October 27, 1997

652 MITCHELL ROAD NEWBURY PARK CA 91320

MECHANICAL DIMENSIONS

PENTIUM

®

PROCESSOR

VOLTAGE REGULATOR MODULE

MP54C

Dimension Inches Millimeters

A 2.575 65.4
B 1.8 45.7
C 0.8 20.3
D 1.6 40.6
E 0.24 6.1

B

2

B

3

B

5

0.42 10.7

0.15 3.8

0.5 12.7

Component size and location for
illustration only