MP55C

© 1997 SEMTECH CORP.

PENTIUM

®

PROCESSOR P55C

VOLTAGE REGULATOR MODULE

October 27, 1997

652 MITCHELL ROAD NEWBURY PARK CA 91320

Pentium is a registered trademark of Intel Corporation. AMD5

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’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 MP55C

is designed to power split voltage plane microproces-

sors requiring 3.3V V

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:

5V ± 5% for MP55C-5 or

3.3V for MP55C-3.3

APPLICATIONS:

AMD5

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Output Voltage

(1)

2.8V version

V

O

2.7

2.8

3.0

V

2.7V version

2.6

2.7

2.8

2.5V version

2.4

2.5

2.6

Output Current

I

O

6.0

A

Line Regulation

(1)

REG

(LINE)

0.015

0.2

%

Load Regulation

(1)

REG

(LOAD)

0.1

0.4

%

Dropout voltage

(MP55C-5)

(MP55C-3.3)

V

D

1.2

0.40

1.3

V

Current Surge Limit

I

S

7.5

A

Quiescent Current

I

Q

12

16

mA

Temperature Coefficient

T

C

0.005

%/°C

Temperature Stability

T

S

0.5

%

RMS Output Noise

(2)

V

N

0.003

%V

O

Ripple Rejection Ratio

R

A

72

dB

Linear Airflow Requirements

(ambient temperature 55°C)

0.5

100

m/s

ft/min

NOTES:

(1) Low duty cycle pulse testing with Kelvin connections required.

(2) Bandwidth of 10 Hz to 10 kHz.

ORDERING INFORMATION:

DEVICE

Input (V)

Output (V)

MP55C-5-2.8

5.0

2.8

MP55C-5-2.5

5.0

2.5

MP55C-3.3-2.8

3.3

2.8

MP55C-3.3-2.7

3.3

2.7

MP55C-3.3-2.5

3.3

2.5

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com