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LTC2979 Datasheet(PDF) 1 Page - Linear Technology

Part No. LTC2979
Description  16-Channel PMBus Low-Voltage Power System Manager
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2979 Datasheet(HTML) 1 Page - Linear Technology

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LTC2979
1
2979f
For more information www.linear.com/LTC2979
TYPICAL APPLICATION
FEATURES
DESCRIPTION
16-Channel PMBus
Low-Voltage Power System Manager
16-Channel PMBus Power System Manager
LTC2979 Sequencing 16 Channels
The LTC®2979 is a 16-channel Power System Manager
used to sequence, trim (servo), margin, supervise,
manage faults, provide telemetry and create fault logs.
PMBus commands support power supply sequencing,
precision point-of-load voltage adjustment and margin-
ing. 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 tempera-
ture 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 trig-
ger black box EEPROM storage of fault status and associ-
ated 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 microproces-
sor if necessary. A single wire bus synchronizes power
supplies across multiple ADI Power System Management
(PSM) devices. Configuration EEPROM with ECC sup-
ports autonomous operation without additional software.
APPLICATIONS
n
Sequence, Trim, Margin and Supervise 16
PowerSupplies
n
Manage Faults, Monitor Telemetry and Create Fault Logs
n
PMBus Compliant Command Set
n
Supported by LTpowerPlay® GUI
n
Margin or Trim Supplies to within 0.5% of Target
n
Fast OV/UV Supervisors per Channel
n
Coordinate Sequencing and Fault Management
Across Multiple ADI PSM Devices
n
Automatic Fault Logging to Internal EEPROM
n
Operate Autonomously without Additional Software
n
Internal Temperature and Input Voltage Supervisors
n
Accurate Monitoring of 16 Output Voltages, Two
Input Voltages and Internal Die Temperature
n
I2C/SMBus Serial Interface
n
Powered from 3.13V to 3.47V
n
Programmable Watchdog Timer
n
Available in 144-Pin 12mm × 12mm BGA Package
n
Computers and Network Servers
n
Industrial Test and Measurement
n
High Reliability Systems
n
Medical Imaging
n
Video
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents including 7382303, 7420359 and 7940091.
48V
R20
R10
R30
LOAD
VOUT
VFB
VIN
RUN
DC/DC
CONVERTER
VSENSEP0
VDAC
VOUT_EN
VIN_SNS
VDD33
IBC
EN
IN OUT
12V
FAULT
PWRGD
SDA
SCL
ALERTB
CONTROL
PMBus
INTERFACE
NOTE: SOME DETAILS OMITTED FOR CLARITY
ONLY ONE OF 16 CHANNELS SHOWN
LTC2979
VIN_EN
2979 TA01a
VSENSEM0
3.3V
REGULATOR
10ms/DIV
2979 TA01b
0.5V/DIV


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