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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.
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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
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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
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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
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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
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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