® 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 conforming to Intel Corporation’s Voltage Regulator Module specification for the Pentium® 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 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. 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 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 VO IO IO REG(LINE) REG(LOAD) VD IS IS IQ TC TS VN RA 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 16 UNITS V A A % % V A A mA %/°C % %VO dB m/s ft/min 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 MP54C October 27, 1997 A INPUT AND OUTPUT CONNECTIONS Pin No. Row A Row B Pin No. 15 1 VSS VSS 1 14 2 VSS VSS 2 13 3 ND VI/O 3 12 4 VI/O VI/O 4 11 5 +3.3V +3.3V 5 10 6 +3.3V +3.3V 6 9 7 VCORE VCORE 7 8 8 VCORE VCORE 8 9 VSS VCORE 9 10 VCORE VCORE 10 11 PWR GOOD UPVRM# 11 12 SENSE DISABLE 12 13 VSS VSS 13 14 +5.0V +5.0V 14 15 +5.0V +5.0V 15 B 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 +3.3V +5.0V VCORE I/O Input Input Output Function +3.3V Supply +5.0V Supply Voltage Regulator Module Output Notes Not connected Input Output VI/O Output Tied to output VSS Input CPU I/O power connection. Allows for split voltage plane for I/O circuitry. Ground Reference DISABLE Input Not connected PWR GOOD SENSE Output UPVRM# Input 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) ND Input Ground 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 MP54C October 27, 1997 MECHANICAL DIMENSIONS 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 B2 0.42 10.7 B3 0.15 3.8 B5 0.5 12.7 © 1997 SEMTECH CORP. Component size and location for illustration only 652 MITCHELL ROAD NEWBURY PARK CA 91320