PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer

Provides Unparalleled Sequencing, Monitoring, and Fault Logging with PWM Margining

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.

Key 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
I²C-/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