LTC2980
16-Channel PMBus
Power System Manager
Fe AT Des Cr IPTION
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Sequence, Trim, Margin and Supervise 16 Power The LTC 2980 is a 16-channel Power System Manager
Supplies used to sequence, trim (servo), margin, supervise, man-
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Manage Faults, Monitor Telemetry and Create Fault Logs age faults, provide telemetry and create fault logs. PMBus
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PMBus Compliant Command Set commands support power supply sequencing, precision
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Supported by LTpowerPlay GUI point-of-load voltage adjustment and margining. DACs use
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Margin or Trim Supplies to Within 0.25% of Target a proprietary soft-connect algorithm to minimize supply
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Fast OV/UV Supervisors Per Channel disturbances. Supervisory functions include overvoltage
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Coordinate Sequencing and Fault Management and undervoltage threshold limits for sixteen power supply
Across Multiple LTC PSM Devices output channels and two power supply input channels, as
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Automatic Fault Logging to Internal EEPROM well as over and under temperature limits. Programmable
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Operate Autonomously without Additional Software fault responses can disable the power supplies with optional
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Internal Temperature and Input Voltage Supervisors retry after a fault is detected. Faults that disable a power
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Accurate Monitoring of 16 Output Voltages, Two supply can automatically trigger black box EEPROM stor-
Input Voltages and Internal Die Temperature age of fault status and associated telemetry. An internal
2
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I C/SMBus Serial Interface 16-bit ADC monitors sixteen output voltages, two input
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Can Be Powered from 3.3V, or 4.5V to 15V voltages, and die temperature. In addition, odd numbered
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Programmable Watchdog Timer channels can be configured to measure the voltage across
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Available in 144-Pin 12mm 12mm BGA Package a current sense resistor. A programmable watchdog timer
monitors microprocessor activity for a stalled condition
and resets the microprocessor if necessary. A single wire
bus synchronizes power supplies across multiple LTC
APPLICATIONs
Power System Management (PSM) devices. Configura-
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Computers and Network Servers
tion EEPROM with ECC supports autonomous operation
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Industrial Test and Measurement
without additional software.
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High Reliability Systems
L, LT, LTC, LTM, LTpowerPlay, PolyPhase, Linear Technology and the Linear logo are
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Medical Imaging registered trademarks of Analog Devices, Inc. PMBus is a trademark of SMIF, Inc. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
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Video
7382303, 7420359 and 7940091.
TYPICAL APPLICATION
Power Supply Accuracy
16-Channel PMBus Power System Manager
14
34 PARTS SOLDERED DOWN
IBC
4.5V V 15V
IBUS
DC IN OUT 12
IN
EN
V
IN
V
IN_SNS 10
V
OUT
V
IN_EN
DC/DC
+
8
* LTC2980 MAY ALSO BE V *
PWR
CONVERTER
POWERED DIRECTLY FROM
V *
DD33
V LOAD
SENSE V RUN
AN EXTERNAL 3.3V SUPPLY FB
6
LTC2980
4
R20
SDA
PMBus
V
SCL
DAC
INTERFACE
2
R30
ALERTB
R10
CONTROL
0
0.25 0.15 0.05 0.05 0.15 0.25
FAULT
PWRGD V ERROR (%)
OUT_EN
2980 TA01b
NOTE: SOME DETAILS OMITTED FOR CLARITY
2980 TA01a ONLY ONE OF 16 CHANNELS SHOWN
2980fa
1
For more information www.linear.com/LTC2980
NUMBER OF PARTS
uresLTC2980
Abs OLu Te M Ax IMu M rATIN PIN CONFI ATION
(Notes 1, 2, 3)
TOP VIEW
Supply Voltages:
PIN 1 1 2 3 4 5 6 7 8 9 10 11 12
V ...................................................... 0.3V to 15V
PWR
A
V .................................................. 0.3V to 15V
IN_SNS
B
V .................................................... 0.3V to 3.6V
DD33
C
V .................................................. 0.3V to 2.75V
DD25
D
Digital Input/Output Voltages:
E
ALERTB, SDA, SCL, CONTROL0,
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,
J
FAULTB11 ................................0.3V to V + 0.3V
DD33
K
ASEL0, ASEL1 ..........................0.3V to V + 0.3V
DD33
L
Analog Voltages:
M
REFP ................................................... 0.3V to 1.35V
BGA PACKAGE
REFM .................................................... 0.3V to 0.3V
144-LEAD (12mm 12mm 1.29mm)
V ............................................. 0.3V to 6V
SENSEP[7:0]
T = 125C, = 32C/W, = 11C/W, = 15C/W, = 18C/W,
JMAX JA JCtop JCbottom JB
V ............................................. 0.3V to 6V
SENSEM[7:0] WEIGHT = 1.6g, VALUES DETERMINED PER JEDEC 51-9, 51-12
V , V ............................... 0.3V to 15V
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]
Operating Junction Temperature Range:
LTC2980C ................................................ 0C to 70C
LTC2980I ........................................... 40C to 105C
Storage Temperature Range ................ 55C to 125C*
Maximum Junction Temperature ........................ 125C*
Maximum Solder Temperature ..............................260C
*See OPERATION section of the LTC2977 data sheet for detailed EEPROM
derating information for junction temperatures in excess of 105C.