LTC2979 16-Channel PMBus Low-Voltage Power System Manager FEATURES DESCRIPTION n Sequence, Trim, Margin and Supervise 16 The LTC 2979 is a 16-channel Power System Manager PowerSupplies used to sequence, trim (servo), margin, supervise, n manage faults, provide telemetry and create fault logs. Manage Faults, Monitor Telemetry and Create Fault Logs n PMBus commands support power supply sequencing, PMBus Compliant Command Set n precision point-of-load voltage adjustment and margin- Supported by LTpowerPlay GUI n ing. DACs use a proprietary soft-connect algorithm to Margin or Trim Supplies to within 0.5% of Target n minimize supply disturbances. Supervisory functions Fast OV/UV Supervisors per Channel n include overvoltage and undervoltage threshold limits Coordinate Sequencing and Fault Management for sixteen power supply output channels and two power Across Multiple ADI PSM Devices supply input channels, as well as over and under tempera- n Automatic Fault Logging to Internal EEPROM ture limits. Programmable fault responses can disable the n Operate Autonomously without Additional Software power supplies with optional retry after a fault is detected. n Internal Temperature and Input Voltage Supervisors Faults that disable a power supply can automatically trig- n Accurate Monitoring of 16 Output Voltages, Two ger black box EEPROM storage of fault status and associ- Input Voltages and Internal Die Temperature 2 ated telemetry. An internal 16-bit ADC monitors sixteen n I C/SMBus Serial Interface output voltages, two input voltages and die temperature. n Powered from 3.13V to 3.47V In addition, odd numbered channels can be configured n Programmable Watchdog Timer to measure the voltage across a current sense resistor. A n Available in 144-Pin 12mm 12mm BGA Package programmable watchdog timer monitors microprocessor activity for a stalled condition and resets the microproces- APPLICATIONS sor if necessary. A single wire bus synchronizes power n Computers and Network Servers supplies across multiple ADI Power System Management n Industrial Test and Measurement (PSM) devices. Configuration EEPROM with ECC sup- n High Reliability Systems ports autonomous operation without additional software. n Medical Imaging All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents including 7382303, 7420359 and 7940091. n Video TYPICAL APPLICATION LTC2979 Sequencing 16 Channels 16-Channel PMBus Power System Manager IBC 12V 48V IN OUT EN V IN V IN SNS V OUT V IN EN V SENSEP0 DC/DC CONVERTER 3.3V 0.5V/DIV V DD33 LOAD REGULATOR V RUN FB LTC2979 V SENSEM0 R20 SDA PMBus R30 SCL INTERFACE V DAC ALERTB R10 2979 TA01b CONTROL 10ms/DIV FAULT PWRGD V OUT EN 2979 TA01a NOTE: SOME DETAILS OMITTED FOR CLARITY ONLY ONE OF 16 CHANNELS SHOWN 2979f 1 For more information www.linear.com/LTC2979LTC2979 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2, 3) TOP VIEW Supply Voltages: PIN 1 1 2 3 4 5 6 7 8 9 10 11 12 V .................................................. 0.3V to 15V IN SNS A V .................................................... 0.3V to 3.6V DD33 B V .................................................. 0.3V to 2.75V DD25 C Digital Input/Output Voltages: D ALERTB, SDA, SCL, CONTROL0, E CONTROL1 ............................................ 0.3V to 5.5V PWRGD, SHARE CLK, F WDI/RESETB, WP ....................0.3V to V + 0.3V G DD33 FAULTB00, FAULTB01, FAULTB10, H FAULTB11 ................................0.3V to V + 0.3V DD33 J ASEL0, ASEL1 ..........................0.3V to V + 0.3V DD33 K Analog Voltages: L REFP ................................................... 0.3V to 1.35V M REFM .................................................... 0.3V to 0.3V BGA PACKAGE V ............................................. 0.3V to 6V SENSEP 7:0 144-LEAD (12mm 12mm 1.29mm) V ............................................. 0.3V to 6V SENSEM 7:0 T = 125C, = 32C/W, = 11C/W, = 15C/W, = 18C/W, JMAX JA JCtop JCbottom JB V , V ................................. 0.3V to 6V OUT EN 7:0 IN EN WEIGHT = 1.6g, VALUES DETERMINED PER JEDEC 51-9, 51-12 V ................................................. 0.3V to 6V DACP 7:0 V ............................................ 0.3V to 0.3V DACM 7:0 Operating Junction Temperature Range: LTC2979C ................................................ 0C to 70C LTC2979I ........................................... 40C to 105C Storage Temperature Range ................ 55C to 125C* Maximum Junction Temperature ........................ 125C* Maximum Solder Temperature ..............................260C *See OPERATION section of the LTC2977 data sheet for detailed EEPROM derating information for junction temperatures in excess of 105C.