Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
General Description
The MAX34451 is a power-supply system manager
that is capable of monitoring up to 16 different voltage
rails or currents and is also capable of sequencing and
margining up to 12 power supplies. The system manager
monitors the power-supply output voltages and currents
and constantly checks them for user programmable
over and under threshold limits. If a fault is detected, the
device automatically shuts down the system in an orderly
fashion. The device can sequence the supplies in any
order at both power-up and power-down. The device has
the ability to close-loop margin the power-supply output
voltages up or down to a user-programmable level. The
device contains an internal temperature sensor and can
support up to four external remote temperature sensors.
Once configured, the device can operate autonomously
without any host intervention.
Applications
● NetworkSwitches/Routers
● BaseStations
● Servers
● SmartGridNetworkSystems
Benets and Features
● 16ChannelsofVoltageorCurrentMonitoring
● 12ChannelsofSequencingandMargining
● FastMinimum/MaximumThresholdExcursion
Detection
● RemoteGroundSensingImprovesMeasurement
Accuracy
● AutomaticClosed-LoopMargining
● ProgrammableUpandDownTime-Basedor
Event-BasedSequencing
● DualSequencingLoops
● SupportsUptoFiveTemperatureSensors
(OneInternal/FourRemote)
● FaultDetectiononAllTemperatureSensors
● ProgrammableAlarmOutputs
● ReportsPeak,Minimum,andAverageLevelsfora
NumberofParameters
● PMBus™-CompliantCommandInterface
● I
2
C-/SMBus-CompatibleSerialBuswithBus
Time-OutFunction
● On-BoardNonvolatileBlackBoxFaultLoggingand
DefaultConfigurationSetting
● ExpandableChannelOperationwithParallelDevices
● ConfigurableCombinatorialLogicSupportingUpto
16GPIsand20GPOs
● NoExternalClockingRequired
● +3.0Vto+3.6VSupplyVoltage
19-6642; Rev 1; 8/13
Ordering Information and Typical Operating Circuit apears
at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX34451.related.
PMBus is a trademark of SMIF, Inc.
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