L I N D O C # : 1600 LXM1600/1600A-xx P H E I N F I N I T E P O W E R O F I P N N O VA T I O N ® P VRM M RO R E L I M I N A R Y S DESCRIPTION The LXM1600/1600A-xx series of DC/DC converters are Voltage Regulator Modules (VRM) which are specifically designed to meet or exceed the Pentium Pro VRM electrical specification as well as its mechanical outline. The LXM1600-xx is guaranteed to deliver a minimum current of 11.2A while the LXM1600A-xx is capable of 12.4A for higher speed processor applications. These converters 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 2 to 3.5V using a 4-bit word from ODULE P E C I F I C A T I O N K E Y F E AT U R E S ■ GUARANTEED > 12.4A (LXM1600A-xx) ■ GUARANTEED > 11.2A (LXM1600-xx) 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 FOUR-BIT WORD (See Table 1) p OVER-VOLTAGE DETECTION CROWBARS THE OUTPUT VOLTAGE IN THE EVENT OF PASS TRANSISTOR FAILURE - 100% PROCESSOR PROTECTION 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 the processors, providing automatic voltage adjustment for each individual processor. Other features include high efficiency, short-circuit protection, over-voltage protection, under-voltage detection, soft start and logic level output enable functions. The LXM1600/1600A-05 powers the processor using the 5V supply as the input power and 12V for the control bias. The LXM1600/1600A-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 LXM1600A-12 is primarily used for multiple processor applications, such as quad processor servers, where 5V supplies may not have the needed current capability. MODULE PHOTO BLOCK DIAGRAM 5V 12V 12V 5VIN 12VIN 12VIN VCCP VSS µP PWRGD VID3 VID2 VID1 VID0 Disable LXM1600/1600A-05 VCCP OUTEN LXM1600/1600A-05 5V S UPPLY APPLICATION IN A VSS µP PWRGD VID3 VID2 VID1 VID0 Disable LXM1600/1600A-12 T ENTIUM OUTEN LXM1600/1600A-12 12V SUPPLY APPLICATION IN A M O D U L E O R D E R I N F O R M AT I O N Part # Input IMAX LXM1600-05 5V 11.2A LXM1600A-05 LXM1600-12 5V 12V 12.4A 11.2A LXM1600A-12 12V 12.4A F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1 Copyright © 1995 Rev. 0.9.1 5/96 11861 WESTERN A VENUE , G ARDEN G ROVE , CA. 92841 1 PRODUCT DATABOOK 1996/1997 LXM1600/1600A-xx P P ENTIUM ® P VRM M RO S R E L I M I N A R Y ODULE P E C I F I C A T I O N ELECTRICAL CHARACTERISTICS Symbol Test Conditions Parameter LXM1600/1600A-05 VIN LXM1600/1600A-12 Total Output Voltage Tolerance LXM1600-xx VO LXM1600A-xx Includes: Initial Accuracy Load Regulation LXM1600-xx LXM1600A-xx Line Regulation Temp. Stability Load Transient LXM1600-xx LXM1600A-xx Output Ripple & Noise Output Current Max. 1600-xx IO Max. 1600A-xx Minimum Power Good Threshold VTHPG Power Good Output LO Resistance RLOPG Output Enable OUTEN LO Level Input Voltage VOL HI Level Input Voltage VOH Turn-on Response TR Efficiency LXM1600/1600A-05 Eff LXM1600/1600A-12 Over-Voltage Threshold LXM1600-xx VOV LXM1600A-xx Average Short-Circuit Current ISC Ambient Temperature TA Required Air Flow LXM1600-xx LXM1600A-xx LXM1600/1600A-xx Min. Typ. Max. 4.75 11.4 2.945 3.135 Input Voltage IO = 0.3A, TA = 25°C I O = 0.3A to 11.2A I O = 0.3A to 12.4A 0.95VIN to 1.05V IN 10 to 60°C IO = 0.3A to 11.2A, VIN = 5V I O = 0.3A to 12.4A, VIN = 5V I O = 5A VO = 3.1V VO = 3.1V 11.2 12.4 5 12 3.1 3.3 ±0.6 15 15 1 16 90 95 12 11.8 12.6 5.25 12.6 3.255 3.465 0 0.93VSET 5 OUTEN = LO IOL = 1mA IOH = 1mA 0 to 99% of VO after VIN reaches 90% I O = 11A I O = 11A VO = 3.1V VO = 3.3V VO = 0V 0.8 2 10 85 80 3.66 3.85 2 0 100 200 IO = 11.2A I O = 12.4A 60 Units V V V V % mV mV mV mV mV mV mV A A A V Ω V V ms % % V V A °C LFM LFM Table 1 2 D3 D2 D1 D0 VSET (V) 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 - Note: 0 ≡ Processor pin connected to ground. 1 ≡ Processor pin Open or pulled High externally by system design to detect a socket with no processor. Copyright © 1995 Rev. 0.9.1 5/96 PRODUCT DATABOOK 1996/1997 LXM1600/1600A-xx P P ENTIUM ® P VRM M RO S R E L I M I N A R Y ODULE P E C I F I C A T I O N CONNECTOR PIN-OUTS AND DESCRIPTIONS Pin # Ref. Desig. Description Pin # A1 A2 A3 A4 A5 A6 5VIN 5VIN 5VIN 12VIN Reserved Reserved 5V Input Power (not needed for LXM1600/1600A-12) 5V Input Power (not needed for LXM1600/1600A-12) 5V Input Power (not needed for LXM1600/1600A-12) 12V Input Power This pin is reserved for future applications This pin is reserved for future applications A7 A8 A9 VID0 VID2 UP# Bit 0 of the 4-bit input (see Table 1) Bit 2 of the 4-bit input (see Table 1) This pin is not connected internally A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 VCCP VSS VCCP VSS VCCP VSS VCCP VSS VCCP VSS VCCP Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Ref. Desig. Description B1 B2 B3 B4 B5 B6 5VIN 5VIN 5VIN 12VIN Reserved OUTEN B7 B8 B9 VID1 VID3 PWRGD 5V Input Power (not needed for LXM1600/1600A-12) 5V Input Power (not needed for LXM1600/1600A-12) 5V Input Power (not needed for LXM1600/1600A-12) 12V Input Power This pin is reserved for future applications A TTL input that disables output when it switches to LO state Bit 1 of the 4-bit input (see Table 1) Bit 3 of the 4-bit input (see Table 1) An open collector output that switches LO when output is below the specified range Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return Output voltage to microprocessor Output voltage return B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B20 VSS VCCP VSS VCCP VSS VCCP VSS VCCP VSS VCCP VSS MODULE DIMENSIONS 3.10 0.188 2.725 Control Board 0.5 .425 TOP VIEW (Underneath) 1.00 1.10 1.50 Power Board Connector 0.55 0.55 Power Board Component Area FRONT VIEW B20 0.1 Connector A20 0.80 B1 A1 Power Board (Facing Connector) Control Board Control Board Component Area 0.032 0.104 Pentium is a registered trademark of Intel Corporation. Copyright © 1995 Rev. 0.9.1 5/96 3