used to sequence, trim (servo), margin, supervise, man-
age faults, provide telemetry and create fault logs. PMBus
commands support power supply sequencing, precision
point-of-load voltage adjustment and margining. DACs use
a proprietary soft-connect algorithm to minimize supply
disturbances. Supervisory functions include overvoltage
and undervoltage threshold limits for sixteen power supply
output channels and two power supply input channels, as
well as over and under temperature limits. Programmable
fault responses can disable the power supplies with optional
retry after a fault is detected. Faults that disable a power
supply can automatically trigger black box EEPROM stor-
age of fault status and associated telemetry. An internal
16-bit ADC monitors sixteen output voltages, two input
voltages, and die temperature. In addition, odd numbered
channels can be configured to measure the voltage across
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
Power System Management (PSM) devices. Configura-
tion EEPROM with ECC supports autonomous operation
without additional software.
L,
LT, LTC, LTM, LTpowerPlay, PolyPhase, Linear Technology and the Linear logo are
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
7382303, 7420359 and 7940091.
n
n
n
n
n
n
n
n
Sequence, Trim, Margin and Supervise 16 Power
Supplies
Manage Faults, Monitor Telemetry and Create Fault Logs
PMBus™ Compliant Command Set
Supported by LTpowerPlay
®
GUI
Margin or Trim Supplies to Within 0.25% of Target
Fast OV/UV Supervisors Per Channel
Coordinate Sequencing and Fault Management
Across Multiple LTC PSM Devices
Automatic Fault Logging to Internal EEPROM
Operate Autonomously without Additional Software
Internal Temperature and Input Voltage Supervisors
Accurate Monitoring of 16 Output Voltages, Two
Input Voltages and Internal Die Temperature
I
2
C/SMBus Serial Interface
Can Be Powered from 3.3V, or 4.5V to 15V
Programmable Watchdog Timer
Available in 144-Pin 12mm
×
12mm BGA Package
APPLICATIONs
n
n
n
n
n
Computers and Network Servers
Industrial Test and Measurement
High Reliability Systems
Medical Imaging
Video
TYPICAL APPLICATION
16-Channel PMBus Power System Manager
14
DC
IN
IBC
IN OUT
EN
4.5V ≤ V
IBUS
≤ 15V
V
IN_SNS
V
IN_EN
V
PWR
*
V
DD33
*
V
IN
12
NUMBER OF PARTS
V
OUT
10
8
6
4
2
R10
0
–0.25
V
OUT_EN
2980 TA01a
Power Supply Accuracy
34 PARTS SOLDERED DOWN
* LTC2980 MAY ALSO BE
POWERED DIRECTLY FROM
AN EXTERNAL 3.3V SUPPLY
+
V
SENSE
LOAD
R20
R30
DC/DC
CONVERTER
V
FB
RUN
LTC2980
PMBus
INTERFACE
SDA
SCL
ALERTB
CONTROL
FAULT
PWRGD
–
V
DAC
–0.15
0.05
–0.05
ERROR (%)
0.15
0.25
2980 TA01b
NOTE: SOME DETAILS OMITTED FOR CLARITY
ONLY ONE OF 16 CHANNELS SHOWN
2980fa
For more information
www.linear.com/LTC2980
1
LTC2980
AbsOLuTe MAxIMuM rATINgs
(Notes 1, 2, 3)
PIN CONFIgurATION
PIN 1
A
B
C
D
E
F
G
H
J
K
L
M
BGA PACKAGE
144-LEAD (12mm
×
12mm
×
1.29mm)
1
2
3
4
5
TOP VIEW
6
7
8
9
10
11
12
Supply Voltages:
V
PWR
...................................................... –0.3V to 15V
V
IN_SNS
.................................................. –0.3V to 15V
V
DD33
.................................................... –0.3V to 3.6V
V
DD25
.................................................. –0.3V to 2.75V
Digital Input/Output Voltages:
ALERTB, SDA, SCL, CONTROL0,
CONTROL1............................................ –0.3V to 5.5V
PWRGD, SHARE_CLK,
WDI/RESETB, WP ....................–0.3V to V
DD33
+ 0.3V
FAULTB00, FAULTB01, FAULTB10,
FAULTB11 ................................–0.3V to V
DD33
+ 0.3V
ASEL0, ASEL1 ..........................–0.3V to V
DD33
+ 0.3V
Analog Voltages:
REFP ................................................... –0.3V to 1.35V
REFM .................................................... –0.3V to 0.3V
V
SENSEP[7:0]
............................................. –0.3V to 6V
V
SENSEM[7:0]
............................................. –0.3V to 6V
V
OUT_EN[3:0]
, V
IN_EN
............................... –0.3V to 15V
V
OUT_EN[7:4]
............................................. –0.3V to 6V
V
DACP[7:0]
................................................. –0.3V to 6V
V
DACM[7:0]
............................................ –0.3V to 0.3V
Operating Junction Temperature Range:
LTC2980C ................................................ 0°C to 70°C
LTC2980I ........................................... –40°C to 105°C
Storage Temperature Range ................ –55°C to 125°C*
Maximum Junction Temperature ........................ 125°C*
Maximum Solder Temperature .............................. 260°C
*See OPERATION section of the LTC2977 data sheet for detailed EEPROM
derating information for junction temperatures in excess of 105°C.
T
JMAX
= 125°C,
θ
JA
= 32°C/W,
θ
JCtop
= 11°C/W,
θ
JCbottom
= 15°C/W,
θ
JB
= 18°C/W,
WEIGHT = 1.6g, VALUES DETERMINED PER JEDEC 51-9, 51-12
OrDer INFOrMATION
PART NUMBER
LTC2980CY#PBF
LTC2980IY#PBF
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
http://www.linear.com/product/LTC2980#orderinfo
PART MARKING*
DEVICE
LTC2980Y
LTC2980Y
FINISH CODE
e1
e1
PACKAGE
TYPE
BGA
BGA
MSL
RATING
3
3
OPERATING JUNCTION
TEMPERATURE RANGE
0°C to 70°C
–40°C to 105°C
Consult Marketing for parts specified with wider operating temperature ranges. *Device temperature grade is indicated by a label on the shipping container.
Pad or ball finish code is per IPC/JEDEC J-STD-609.
•
Terminal Finish Part Marking:
www.linear.com/leadfree
•
Recommended LGA and BGA PCB Assembly and Manufacturing Procedures:
www.linear.com/umodule/pcbassembly
•
LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
2
2980fa
For more information
www.linear.com/LTC2980
LTC2980
eLeCTrICAL ChArACTerIsTICs
SYMBOL
V
PWR
I
PWR
I
VDD33
V
UVLO_VDD33
PARAMETER
V
PWR
Supply Input Operating Range
V
PWR
Supply Current
V
DD33
Supply Current
V
DD33
Undervoltage Lockout
V
DD33
Undervoltage Lockout
Hysteresis
V
DD33
Supply Input Operating Range
Regulator Output Voltage
V
DD25
t
INIT
Regulator Output Voltage
Initialization Time
V
PWR
= V
DD33
4.5V ≤ V
PWR
≤ 15V
3.13V ≤ V
DD33
≤ 3.47V
Time from V
IN
Applied Until the TON_DELAY
Timer Starts
(Note 4)
(Note 5)
Differential Voltage:
V
IN_ADC
= (V
SENSEPn
– V
SENSEMn
)
Single-Ended Voltage: V
SENSEMn
Current Sense Input Range (Odd
Numbered Channels Only)
N_ADC
Voltage Sense Resolution (Uses L16
Format)
Current Sense Resolution (Odd
Numbered Channels Only)
Single-Ended Voltage: V
SENSEPn
, V
SENSEMn
Differential Voltage: V
IN_ADC
0V ≤ V
IN_ADC
≤ 6V
Mfr_config_adc_hires = 0
0mV ≤ |V
IN_ADC
| < 16mV (Note 6)
16mV ≤ |V
IN_ADC
| < 32mV
32mV ≤ |V
IN_ADC
| < 63.9mV
63.9mV ≤ |V
IN_ADC
| < 127.9mV
127.9mV ≤ |V
IN_ADC
|
Mfr_config_adc_hires = 1
Voltage Sense Mode V
IN_ADC
≥ 1V
Voltage Sense Mode 0 ≤ V
IN_ADC
≤ 1V
TUE_ADC_
CURR_SNS
Total Unadjusted Error (Note 4)
Current Sense Mode, Odd Numbered
Channels Only, 20mV ≤ V
IN_ADC
≤ 170mV
Current Sense Mode, Odd Numbered
Channels Only, V
IN_ADC
≤ 20mV
V
OS_ADC
t
CONV_ADC
Offset Error
Conversion Time
Current Sense Mode, Odd Numbered
Channels Only
Voltage Sense Mode (Note 7)
Current Sense Mode (Note 7)
Temperature Input (Note 7)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. V
PWR
= V
IN_SNS
= 12V, V
DD33
, V
DD25
and REF pins floating, unless
otherwise indicated. (Notes 2, 3)
CONDITIONS
l
MIN
4.5
TYP
MAX
15
UNITS
V
mA
mA
V
mV
Power Supply Characteristics
4.5V ≤ V
PWR
≤ 15V, V
DD33
Floating
3.13V ≤ V
DD33
≤ 3.47V, V
PWR
= V
DD33
V
DD33
Ramping Up, V
PWR
= V
DD33
l
l
l
10
10
2.35
2.55
120
3.13
3.13
75
2.35
30
3.26
90
2.5
55
30
13
13
2.8
3.47
3.47
140
2.6
80
V
V
mA
V
mA
ms
Regulator Output Short-Circuit Current V
PWR
= 4.5V, V
DD33
= 0V
Regulator Output Short-Circuit Current V
PWR
= V
DD33
= 3.47V, V
DD25
= 0V
Voltage Reference Characteristics
V
REF
Output Voltage
Temperature Coefficient
Hysteresis
ADC Characteristics
V
IN_ADC
Voltage Sense Input Range
0
–0.1
–0.1
–170
122
15.625
31.25
62.5
125
250
±0.25
±2.5
±0.7
±140
±100
6.15
24.6
24.6
6
0.1
6
170
V
V
V
mV
µV/LSB
µV/LSB
µV/LSB
µV/LSB
µV/LSB
µV/LSB
% of
Reading
mV
% of
Reading
µV
µV
ms
ms
ms
2980fa
1.232
3
100
V
ppm/°C
ppm
TUE_ADC_
VOLT_SNS
Total Unadjusted Error (Note 4)
For more information
www.linear.com/LTC2980
3
LTC2980
eLeCTrICAL ChArACTerIsTICs
SYMBOL
t
UPDATE_ADC
C
IN_ADC
f
IN_ADC
I
IN_ADC
PARAMETER
Update Time
Input Sampling Capacitance
Input Sampling Frequency
Input Leakage Current
Differential Input Current
DAC Output Characteristics
N_V
DACP
V
FS_VDACP
INL_V
DACP
DNL_V
DACP
V
OS_VDACP
V
DACP
Resolution
Full-Scale Output Voltage
(Programmable)
Integral Nonlinearity
Differential Nonlinearity
Offset Voltage
Load Regulation (V
DACPn
– V
DACMn
)
PSRR (V
DACPn
– V
DACMn
)
DC CMRR (V
DACPn
– V
DACMn
)
Leakage Current
Short-Circuit Current Low
Short-Circuit Current High
C
OUT
t
S_VDACP
V
OS_CMP
Output Capacitance
DAC Output Update Rate
Offset Voltage
DAC Code = 0x3FF Buffer Gain Setting_0
DAC Polarity = 1
Buffer Gain Setting_1
(Note 8)
(Note 8)
(Note 8)
V
DACPn
= 2.65V, I
VDACPn
Sourcing = 2mA
V
DACPn
= 0.1V, I
VDACPn
Sinking = 2mA
DC: 3.13V ≤ V
DD33
≤ 3.47V, V
PWR
= V
DD33
100mV Step in 20ns with 50pF Load
–0.1V ≤ V
DACMn
≤ 0.1V
V
DACPn
Hi-Z, 0V ≤ V
DACPn
≤ 6V
V
DACPn
Shorted to GND
V
DACPn
Shorted to V
DD33
V
DACPn
Hi-Z
Fast Servo Mode
V
DACPn
= 0.2V
V
DACPn
= 1.3V
V
DACPn
= 2.65V
Voltage Supervisor Characteristics
V
IN_VS
Input Voltage Range (Programmable)
V
IN_VS
= (V
SENSEPn
Low Resolution Mode
– V
SENSEMn
)
High Resolution Mode
Single-Ended Voltage: V
SENSEMn
N_VS
TUE_VS
Voltage Sensing Resolution
Total Unadjusted Error
0V to 3.8V Range: High Resolution Mode
0V to 6V Range: Low Resolution Mode
2V ≤ V
IN_VS
≤ 6V, Low Resolution Mode
1.5V < V
IN_VS
≤ 3.8V, High Resolution
Mode
0.8V ≤ V
IN_VS
≤ 1.5V, High Resolution
Mode
t
S_VS
Update Period
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. V
PWR
= V
IN_SNS
= 12V, V
DD33
, V
DD25
and REF pins floating, unless
otherwise indicated. (Notes 2, 3)
CONDITIONS
Odd Numbered Channels in Current Sense
Mode (Note 7)
MIN
TYP
160
1
62.5
V
IN_ADC
= 0V, 0V ≤ V
COMMONMODE
≤ 6V,
Current Sense Mode
V
IN_ADC
= 0.17V, Current Sense Mode
V
IN_ADC
= 6V, Voltage Sense Mode
l
l
l
MAX
UNITS
ms
pF
kHz
±0.5
80
10
10
1.32
2.53
1.38
2.65
1.44
2.77
±2
±2.4
±10
100
100
60
40
60
±100
–10
4
10
500
±1
±2
±3
0
0
–0.1
4
8
±1.25
±1.0
±1.5
12.21
±18
±26
±52
6
3.8
0.1
–4
10
250
15
µA
nA
µA
Bits
V
V
LSB
LSB
mV
ppm/mA
ppm/mA
dB
dB
dB
nA
mA
mA
pF
µs
mV
mV
mV
V
V
V
mV/LSB
mV/LSB
% of
Reading
% of
Reading
% of
Reading
µs
2980fa
DAC Soft-Connect Comparator Characteristics
4
For more information
www.linear.com/LTC2980
LTC2980
eLeCTrICAL ChArACTerIsTICs
SYMBOL
V
VIN_SNS
R
VIN_SNS
TUE
VIN_SNS
PARAMETER
V
IN_SNS
Input Voltage Range
V
IN_SNS
Input Resistance
VIN_ON, VIN_OFF Threshold Total
Unadjusted Error
3V ≤ V
VIN_SNS
≤ 8V
V
VIN_SNS
> 8V
READ_VIN Total Unadjusted Error
3V ≤ V
VIN_SNS
≤ 8V
V
VIN_SNS
> 8V
Temperature Sensor Characteristics
TUE_TS
V
VOUT_ENn
I
VOUT_ENn
Total Unadjusted Error
Output High Voltage (Note 9)
Output Sourcing Current
Output Sinking Current
I
VOUT_ENn
= –5µA, V
DD33
= 3.3V
Strong Pull-Down Enabled,
V
VOUT_ENn
= 0.4V
Internal Pull-Up Disabled,
0V ≤ V
VOUT_ENn
≤ 15V
Strong Pull-Down Enabled,
V
OUT_ENn
= 0.1V
0V ≤ V
VOUT_ENn
≤ 6V
I
VIN_EN
= –5µA, V
DD33
= 3.3V
V
IN_EN
Pull-Up Enabled, V
VIN_EN
= 1V
V
VIN_EN
= 0.4V
Internal Pull-Up Disabled,
0V ≤ V
VIN_EN
≤ 15V
0°C < T
J
< 85°C During EEPROM Write
Operations
T
J
< 105°C
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
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