MAX34462EXQ+ Analog Devices

EVALUATION KIT AVAILABLE MAX34462 PMBus 16-Channel Monitor/Sequencer with Differential Inputs and Margining DACs General Description Benefits and Features The MAX34462 is a system monitor that can manage 16 Channels of Power-Sup ply Management up to 16 power supplies. The power-supply manager Power-Supply Voltage or Current Measurement and monitors the power-supply output voltages and con- Monitoring stantly checks for user-programmable overvoltage and Fast Minimum/Maximum Threshold Excursion undervoltage thresholds. If a fault is detected, the device Detection automatically shuts down the system in an orderly fash- ion. The device can sequence the supplies in any order Differential Input Sensing Improves Measurement Accuracy at both power-up and power-down. The device contains 16 independent voltages DACs, which the device uses to 16 Independent Voltage DACs for Power-Supply close-loop margin the power-supply output voltages up or Margining down to a user-programmable level. The device contains Automatic Closed-Loop Margining an internal temperature sensor and can support up to four Programmable Up and Down Sequencing external remote temperature sensors. Once configured, the device can operate autonomously without any host Up to Four Independent Sequencing Loops intervention. 5V Tolerant Power-Supply Output Enables Internal Temperature Sensor Applications Network Switches/Routers Repo rts Peak and Average Levels for a Number of Base Stations Parameters Servers PMBus-Compliant Command Interface Smart Grid Network Systems 2 I C/SMBus-Compatible Serial Bus with Bus Timeout Function On-Board Nonvolatile Black Box Fault Logging and Ordering Information and Typical Operating Circuit appear Default Configuration Setting at end of data sheet. Expandable Channel Operation with Parallel Devices Sequencing Can be Timing Synchronized Across For related parts and recommended products to use with this part, refer Multiple Devices to www.maximintegrated.com/MAX34462.related. Configurable Combinatorial Logic Supporting Up to 16 GPIs and 36 GPOs No External Clocking Requ ired +3.0 to +3.6V Supply Voltage PMBus is a trademark of SMIF, Inc. 19-6785 Rev 0 9/13MAX34462 PMBus 16-Channel Monitor/Sequencer with Differential Inputs and Margining DACs TABLE OF CONTENTS G e n e r a l D es c r i ptio n ............................................................................ 1 Applications .................................................................................. 1 B e n ef it s an d Fe atu r e s .......................................................................... 1 A bs o l u te M a x i m u m Rat i ng s ...................................................................... 8 Rec om m e n d ed O pe rat i n g C on di t i on s .............................................................. 8 El e c t r i c al Char ac te r i st i c s ........................................................................ 9 2 I C /S M B u s I nte r f ac e El ec t r i c a l Spec if i c at i ons .......................................................11 2 I C / S M B u s T imin g.............................................................................11 Typical Operating Characteristics ................................................................ 12 B um p C onf i g urat i on ........................................................................... 14 B um p D es c r i ptio n............................................................................. 15 E x pan d e d B u m p D e s c r ipt i o n 20 C S BG A B u m p M a p 20 B l o c k D i ag r am ............................................................................... 21 Detailed Description........................................................................... 22 PM B u s / S M B u s A d d r e s s S e l e c t 26 S M Bu s / PM Bu s O p er at i o n . 26 S M B u s / PM B u s O p e r at i o n E xa m p l e s 27 G r o up C o mma n d 28 G r o up C o mma n d Wr i te Fo r mat 28 Addressing 28 A L ERT a n d A l e r t Re s p o n s e A d d r e s s (A R A) 28 H o st S e n d s o r Re a d s To o Few B i t s . 28 H o st S e n d s o r Re a d s To o Few By te s 29 H o st S e n d s To o M a ny By te s o r B i t s . 29 H o st Re a d s To o M a ny By te s o r B i t s . 29 H o st S e n d s I m p r o p e r l y S et Re a d B i t i n t h e S l ave A d d r e s s By te . 29 U n s u p p o r te d C o m m a n d C o d e Re c e i ve d / H o st Wr i te s to a Re a d - O n l y C o m m a n d . 29 I nva li d Dat a Re c eive d 29 H o st Re a d s f r o m a Wr i te - O n l y C o m m a n d 29 S M B us T im e o u t . 29 PM B us O pe rat i on . 29 PM B u s Pr oto c o l S u p p o r t . 30 D at a Fo r m at . 31 I nte r p r et i n g Re c e i ve d D I R ECT Fo r m at Va l u e s . 31 S e n d i n g a D I R ECT Fo r m at Va l u e . 31 Fau l t M ana g e m e nt an d Re p o r t in g 31 Maxim Integrated 2 www.maximintegrated.com