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LXM1700-05 Datasheet(PDF) 1 Page - Microsemi Corporation |
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LXM1700-05 Datasheet(HTML) 1 Page - Microsemi Corporation |
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1 / 4 page  DESCRIPTION KEY FEA TURES The LXM1700/1700A series of DC/DC converters are Voltage Regulator Modules (VRM) which are specifically designed to meet or exceed the Intel VRM8.1 DC/DC Converter electrical specification as well as its mechanical outline. The LXM1700-xx/1700A-xx is guaranteed to deliver a maximum current of at least 14A. These convert- ers maintain a total tolerance of ±5% maximum, which includes load and line regulation, temperature stability, inital accuracy, load transient and ripple and noise. One of the main features of these converters is their ability to program the output voltage from 1.8 to 3.5V using a 5-bit word from the processors, providing automatic voltage adjustment for each individual processor. Other features s s s s s GUARANTEED 14.0A OUTPUT p TOTAL OUTPUT TOLERANCE OF LESS THAN ±5% — Includes: Line & load regulation, temperature stability, initial accuracy, load transient and ripple & noise. p ADJUSTABLE OUTPUT VOLTAGE USING A FIVE-BIT WORD (See Table 1) p OVER-VOLTAGE DETECTION CROWBARS THE OUTPUT VOLTAGE IN THE EVENT OF PASS TRANSISTOR FAILURE - 100% PROCESSOR PROTECTION (LXM1700-xx) p HIGH EFFICIENCY — 85% (TYP.) p POWER GOOD SIGNAL INDICATES LOW OUTPUT VOLTAGE p SOFT-START ELIMINATES TURN-ON OVERSHOOT p SHORT-CIRCUIT PROTECTION p OUTPUT ENABLE /SHUTDOWN MODULE ORDER INFORMATION LXM1700-05 +5V, +12V 14.0A Yes LXM1700-12 +12V 14.0A LXM1700A-05 +5V, +12V 14.0A No LXM1700A-12 +12V 14.0A Part # Input I MAX O.V. Protection Crowbar include high efficiency, short-circuit protection, over-voltage protection (LXM1700-xx only), under-voltage detection, soft start and logic level output enable functions. The LXM1700-05/1700A-05 powers the processor using the 5V supply as the input power and 12V for the control bias. The LXM1700-12/ 1700A-12 powers the processor using only the 12V supply and does not need a separate voltage for the control bias (see Block Diagram below). The +5V or the +12V input configuration is factory set via simple jumper connec- tions. The LXM1700-12/1700A-12 is primarily used for multiple processor applications, such as quad processor servers, where 5V supplies may not have the needed current capability. BLOCK DIAGRAM LXM1700-05/1700A-05 IN A +5V SUPPLY APPLICATION LXM1700-12/1700A-12 IN A +12V SUPPLY APPLICATION P ENTIUM ® II VRM M ODULE P RELIMINAR Y D AT A S HEET T HE I NFINITE P OWER OF I NNOV A TION Copyright © 1997 Rev. 0.4 4/97 FOR FUR THER INFORMA TION CALL (714) 898-8121 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841 LXM1700-xx/1700A-xx 1 LIN DOC #: 1700 MODULE PHOTO APPLICA TIONS s PENTIUM II PROCESSOR s PENTIUM PRO PROCESSOR s ADVANCED MICROPROCESSOR SUPPLIES V CC (VID) V SS PWRGD VID3 VID2 VID1 VID0 OUTEN µP Disable 5V 12V V CCP (VID) V SS VID0 OUTEN µP Disable 12V 5V IN 12V IN 12V IN UP# VID4 PWRGD UP# VID3 VID2 VID1 VID4 |
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