Not recommended for new design LXM1700-xx/1700A-xx H E I N F I N I T E P O W E R I O F N N O VA T I O N ENTIUM P R E L I M I N A R Y ® II VRM M DESCRIPTION A T A S H E E T K E Y F E AT U R E 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 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 connections. 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. bs ol et e 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 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 1.8 to 3.5V using a 5-bit word from the processors, providing automatic voltage adjustment for each individual processor. Other features D ODULE MODULE PHOTO A P P L I C AT I O N S ■ PENTIUM II PROCESSOR ■ PENTIUM PRO PROCESSOR ■ ADVANCED MICROPROCESSOR SUPPLIES BLOCK DIAGRAM 5V 12V VCC (VID) VSS O µP Disable UP# PWRGD VID4 VID3 VID2 VID1 VID0 LXM1700-05/1700A-05 5VIN 12VIN LXM1700-05/1700A-05 IN A +5V SUPPLY APPLICATION 12VIN VCCP (VID) VSS µP Disable OUTEN 12V UP# PWRGD VID4 VID3 VID2 VID1 VID0 LXM1700-12/1700A-12 T P OUTEN LXM1700-12/1700A-12 IN A +12V SUPPLY APPLICATION M O D U L E O R D E R I N F O R M AT I O N Part # Input IMAX LXM1700-05 +5V, +12V 14.0A LXM1700-12 LXM1700A-05 +12V +5V, +12V 14.0A 14.0A LXM1700A-12 +12V 14.0A O.V. Protection Crowbar Yes No 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 © 1997 Rev. 0.4 4/97 11861 WESTERN A VENUE , G ARDEN G ROVE , CA. 92841 1 PRODUCT DATABOOK 1996/1997 LXM1700-xx/1700A-xx P ENTIUM P R E L I M I N A R Y D A T A ODULE S H E E T CHARACTERISTICS Symbol Test Conditions +5V +12V LXM1700-xx/1700A-xx Min. Typ. Max. 4.75 11.4 2.945 VIN VO 3.1V Set Point IO = 0.5A, TA = 25°C I O = 0.5A to 14.0A 0.95VIN to 1.05V IN 10 to 60°C I O = 0.5A to 14.0A, VIN = 5V I O = 5A VO = 3.1V 5 12 3.1 ±0.6 15 1 16 95 12 5.25 12.6 3.255 bs ol et e Total Output Voltage Tolerance Includes: Initial Accuracy Load Regulation Line Regulation Temp. Stability Load Transient Output Ripple & Noise Output Current II VRM M ELECTRICAL Parameter Input Voltage Range ® Maximum Minimum Power Good Threshold Power Good Output LO Voltage Output Enable LO Level Input Voltage HI Level Input Voltage Turn-on Response Efficiency LXM1700-05/1700A-05 LXM1700-12/1700A-12 Over-Voltage Threshold LXM1700-xx Average Short-Circuit Current Ambient Temperature Required Air Flow IO 14.0 0 VTHPG RLOPG OUTEN VOL VOH TR Eff VOV ISC TA 0.93VSET 0.4 ISINK = 5mA 0.8 IOL = 1mA IOH = 1mA 0 to 99% of VO after VIN reaches 90% IO = 14.0A IO = 14.0A VO = 3.1V VO = 0V 2 10 80 80 3.41 85 85 3.57 2 0 100 IO = 14.0A 3.72 60 Units V V V % mV mV mV mV mV A A V V V V ms % % V A °C LFM Table 1 - Voltage Identification Code Processor Pins Processor Pins 0 = Connected to VSS , 1 = Open or pull-up to VIN VCC (VID) 0 = Connected to VSS , 1 = Open or pull-up to VIN VID4 VID3 VID2 VID1 VID0 (VDC) VID4 VID3 VID2 VID1 VID0 (VDC) 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 * * * * * * * * * * 1.80 1.85 1.90 1.95 2.00 2.05 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 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 No CPU 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 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VCC (VID) * Level reserved for future requirements; VRM8.1 output shall be disabled for these VID codes. 2 Copyright © 1997 Rev. 0.4 4/97 PRODUCT DATABOOK 1996/1997 LXM1700-xx/1700A-xx P ENTIUM II VRM M P R E L I M I N A R Y ® D ODULE S A T A H E E T CONNECTOR PIN-OUTS AND DESCRIPTIONS Pin # Description Pin # 5VIN 5VIN 5VIN 12VIN Reserved ISHARE VID0 VID2 VID4 VCC (VID) VSS VCC (VID) VSS VCC (VID) VSS VCC (VID) VSS VCC (VID) VSS VCC (VID) 5V Input Power (not needed for LXM1700-12) 5V Input Power (not needed for LXM1700-12) 5V Input Power (not needed for LXM1700-12) 12V Input Power This pin is reserved for future applications Consult Factory Bit 0 of the 5-bit input (see Table 1) Bit 2 of the 5-bit input (see Table 1) Bit 4 of the 5-bit input (see Table 1) 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 B1 B2 B3 B4 B5 Ref. Desig. Description 5VIN 5VIN Reserved 12VIN UP # 5V Input Power (not needed for LXM1700-12) 5V Input Power (not needed for LXM1700-12) This pin is reserved for future applications 12V Input Power A TTL input indicates the presence of an upgrade processor. LOW = Upgrade processor A TTL input that disables output when it switches to LO state Bit 1 of the 5-bit input (see Table 1) Bit 3 of the 5-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 bs ol et e A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 Ref. Desig. B6 OUTEN B7 B8 B9 VID1 VID3 PWRGD B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B20 VSS VCC (VID) VSS VCC (VID) VSS VCC (VID) VSS VCC (VID) VSS VCC (VID) VSS MODULE DIMENSIONS 3.10 (78.74) 0.188 (4.78) 2.725 (69.22) 1.00 (25.4) 0.30 (7.62) Max. O TOP VIEW 0.26 (6.60) Min. 1.50 (38.1) 0.15 (3.81) Typical Power Board Connector 0.065 (1.65) Ref 0.42 (10.67) Typical Power Board Component Area FRONT VIEW B20 (Facing Connector) Connector A20 B1 0.80 (20.32) A1 0.062 ±0.008 (1.58 ±0.20) Note: All dimensions in inches (mm). Copyright © 1997 Rev. 0.4 4/97 3 PRODUCT DATABOOK 1996/1997 LXM1700-xx/1700A-xx P ENTIUM II VRM M P R E L I M I N A R Y ® D A T A ODULE S H E E T A P P L I C AT I O N I N F O R M AT I O N CTRL INPUT 3.3V DC INPUT 10K 10K 10K 10K 10K 10K VID0 VID2 GND bs ol et e VID1 UP# VCC (VID) VID3 3.3V VID4 DISABLE (LO) ENABLE (HI or Open) OUTEN 4.7K PGOOD LXM1700/1700A PART # LXM1700-05/1700A-05 LXM1700-12/1700A-12 DC INPUT +5V +12V PENTIUM PRO PROCESSOR GND VID Pins 0.1µf CTRL INPUT +12V N.C. FIGURE 1. — TYPICAL APPLICATION OF THE LXM1700-xx/1700A-xx O Note: 10k pull-up resistors are optional and needed only in cases of noise suppression or long leads. Pentium is a registered trademark of Intel Corporation. 4 Copyright © 1997 Rev. 0.4 4/97