LTM2987
16-Channel Module PMBus
Power System Manager
Fea T Descrip T
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Sequence, Trim, Margin and Supervise 16 Power The LTM 2987 is a 16-channel Module (micromodule)
Supplies Power System Manager used to sequence, trim (servo),
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Manage Faults, Monitor Telemetry and Create Fault margin, supervise, manage faults, provide telemetry and
Logs create fault logs. PMBus commands support power sup-
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PMBus Compliant Command Set ply sequencing, precision point-of-load voltage adjustment
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Supported by LTpowerPlay GUI and margining. DACs use a proprietary soft-connect algo-
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Margin or Trim Supplies to Within 0.25% of Target rithm to minimize supply disturbances. Supervisory func-
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Fast OV/UV Supervisors Per Channel tions include overvoltage and undervoltage threshold limits
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Coordinate Sequencing and Fault Management for sixteen power supply output channels and two power
Across Multiple LTC PSM Devices supply input channels, as well as over and under tempera-
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Automatic Fault Logging to Internal EEPROM ture limits. Programmable fault responses can disable the
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Operate Autonomously without Additional Software power supplies with optional retry after a fault is detected.
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Internal Temperature and Input Voltage Supervisors Faults that disable a power supply can automatically trig-
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Accurate Monitoring of 16 Output Voltages, Two ger black box EEPROM storage of fault status and associ-
Input Voltages and Internal Die Temperature ated telemetry. An internal 16-bit ADC monitors sixteen
2
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I C/SMBus Serial Interface output voltages, two input voltages, and die temperature.
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Can Be Powered from 3.3V, or 4.5V to 15V In addition, odd numbered channels can be configured
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Programmable Watchdog Timer to measure the voltage across a current sense resistor. A
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Available in 144-Pin 15mm 15mm BGA Package programmable watchdog timer monitors microprocessor
activity for a stalled condition and resets the microproces-
sor if necessary. A single wire bus synchronizes power
a T
supplies across multiple LTC Power System Management
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Computers and Network Servers
(PSM) devices. Configuration EEPROM with ECC supports
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Industrial Test and Measurement
autonomous operation without additional software.
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High Reliability Systems
L, LT, LTC, LTM, Module, PolyPhase, LTpowerPlay, Linear Technology and the Linear logo
n are registered trademarks of Analog Devices, Inc. PMBus is a trademark of SMIF,Inc.All other
Medical Imaging
trademarks are the property of their respective owners. Protected by U.S. Patents including
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Video 7382303, 7420359 and 7940091.
Typical a T
Power Supply Accuracy
16-Channel PMBus Power System Manager
20
IBC
4.5V V 15V
IBUS 46 PARTS SOLDERED DOWN
DC IN OUT 18
IN
EN
16
V
V
IN
IN_SNS
V
OUT
14
V
IN_EN
+
* LTM2987 MAY ALSO BE DC/DC
12
V *
PWR
POWERED DIRECTLY FROM CONVERTER
AN EXTERNAL 3.3V SUPPLY V * V LOAD 10
DD33 SENSE
V RUN
FB
8
LTM2987
6
R20
SDA
4
V
DAC
SCL
2
PMBus R30
ALERTB R10
INTERFACE
0
CONTROL
0.25 0.15 0.05 0.05 0.15 0.25
FAULT ERROR (%)
V
PWRGD 2987 TA01b
OUT_EN
NOTE: SOME DETAILS OMITTED FOR CLARITY
2987 TA01a
ONLY ONE OF 16 CHANNELS SHOWN
2987fa
1
For more information www.linear.com/LTM2987
NUMBER OF PARTS
ion pplica
ions pplica
ion uresLTM2987
a Te Maxi Mu M r a T p in c F T
(Notes 1, 2, 3)
Supply Voltages:
TOP VIEW
V ...................................................... 0.3V to 15V PIN 1 1 2 3 4 5 6 7 8 9 10 11 12
PWR
V .................................................. 0.3V to 15V A
IN_SNS
V .................................................... 0.3V to 3.6V
B
DD33
V .................................................. 0.3V to 2.75V
DD25
C
Digital Input/Output Voltages:
D
ALERTB, SDA, SCL, CONTROL0,
E
CONTROL1 ............................................ 0.3V to 5.5V
F
PWRGD, SHARE_CLK,
G
WDI/RESETB, WP ....................0.3V to V + 0.3V
DD33
H
FAULTB00, FAULTB01, FAULTB10,
FAULTB11 ................................0.3V to V + 0.3V J
DD33
ASEL0, ASEL1 ..........................0.3V to V + 0.3V
DD33 K
Analog Voltages:
L
REFP ................................................... 0.3V to 1.35V
M
REFM .................................................... 0.3V to 0.3V
BGA PACKAGE
V ............................................. 0.3V to 6V
SENSEP[7:0] 144-LEAD (15mm 15mm 3.42mm)
V ............................................. 0.3V to 6V
SENSEM[7:0]
T = 125C, = 25.2C/W, = 15.6C/W, = 7.1C/W, = 10.4C/W,
JMAX JA JCtop JCbottom JB
V , V ............................... 0.3V to 15V WEIGHT = 1.6g, VALUES DETERMINED PER JEDEC 51-9, 51-12
OUT_EN[3:0] IN_EN
V ............................................. 0.3V to 6V
OUT_EN[7:4]
V ................................................. 0.3V to 6V
DACP[7:0]
V ............................................ 0.3V to 0.3V
DACM[7:0]
Pull-Up Resistors:
V ....................................................... 0.3V to 5.5V
PU
R , R , R , R ........................ 0.3V to 5.5V
PU1 PU2 PU3 PU4
Operating Junction Temperature Range:
LTM2987C ............................................... 0C to 70C
LTM2987I .......................................... 40C to 105C
Storage Temperature Range ................ 55C to 125C*
Maximum Junction Temperature ........................ 125C*
Maximum Solder Temperature .............................. 250C
*See OPERATION section of the LTC2977 data sheet for detailed EEPROM
derating information for junction temperatures in excess of 105C.