SMM766 1 Preliminary Information (See Last Page) Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link FEATURES & APPLICATIONS INTRODUCTION The SMM766 is an Active DC Output power supply Extremely accurate (0.2%) Active DC Output TM Control (ADOC) Controller (ADOC ) that monitors, margins, and cascade sequences. The ADOC feature is unique and Sequence-Link provides sequencing of up to maintains extremely accurate settings of system 48 channels supply voltages to within 0.2% under full load. The ADOC automatically adjusts supply output SMM766 actively controls up to 6 DC/DC converters voltage level under all DC load conditions and can be linked with up to 7 other Sequence-Link Monitors, controls, and margins up to 6 devices to accommodate sequencing of up to 48 supplies from 0.3V to 5.5V with 1.25V Vref channels. Control of the DC-DC converters is Programmable power-on/-off sequencing accomplished through the use of a Trim or Regulator Operates from any intermediate bus supply VADJ/FB pin to adjust the output voltage. For system from 6V to 14V and from 2.7V to 5.5V test, the part also controls margining of the supplies Monitors 12V input VDD and temperature sensor 2 using I C commands. It can margin supplies with Wide margin/ADOC range from 0.3V to VDD either positive or negative control within a range of Monitors two general-purpose 10-bit ADC inputs 0.3V to VDD, depending on the specified range of the 2 I C 2-wire serial bus for programming converter. The SMM766 also intelligently sequences configuration and monitoring status, including or cascades the power supplies on and off in any 10-bit ADC conversion results order using enable outputs with programmable 2 programmable Under Voltage (UV) and Over polarity. It can operate off any intermediate bus supply Voltage (OV) threshold limits for each of 11 ranging from 6V to 14V or from 5.5V to as low as 2.7V. monitored inputs The part monitors 6 power supply channels as well as 2k-bit general purpose nonvolatile memory VDD, 12V input, two general-purpose analog inputs Applications and an internal temperature sensor using a 10-bit Monitor/control distributed and POL supplies ADC. The 10-bit ADC can measure the value on any Multi-voltage processors, DSPs, ASICSs used in one of the monitor channels and output the data via 2 telecom, CompactPCI or server systems the I C bus. A host system can communicate with the SMM766 status register, margining and utilize 2K-bits of nonvolatile memory. SIMPLIFIED APPLICATIONS DRAWING 12VIN (+6V to +14V Range) 12V 3.3V 3.3VIN (+2.7V to +5.5V Range) DC/DC Converter C, E CAP A VIN TRIM CAP SDA A DC/DC 2 I C Converter A SCL 2.5VIN BUS Vout A2 TRIM TRIM A PUP ON/OFF A SEQ LINK 2 of 6 DC-DC Converters shown External VM SMM766 A or DC/DC P/ Internal AIN1 Converter D, F CAP B TEMP ASIC VIN TRIM CAP SENSOR B DC/DC Converter B 1.2VIN Environmental Vout AIN2 SENSOR TRIM TRIM B PUP B ON/OFF VREF External or Internal VM REFERENCE B RESET HEALTHY READY Figure 1 Applications schematic using the SMM766 controller to actively control the output levels of up to 6 DC/DC converters while also providing power-on/off, cascade sequencing and output margining. Note: This is an applications example only. Some pins, components and values are not shown. SUMMIT Microelectronics, Inc. 2006 757 N. Mary Avenue Sunnyvale CA 94085 Phone 408 523-1000 FAX 408 523-1266 The Summit Web Site can be accessed by right or left mouse clicking on the link: SMM766 Preliminary Information TABLE OF CONTENTS General Description... 3 Recommended Use Of The Power On Pin .19 Internal Functional Block Diagram.. 4 Applications Schematic ..20 Pin Descriptions ..5-6 Development Hardware & Software .....21 2 Package And Pin Configuration ..7 I C Programming Information Absolute Maximum Ratings .8 Serial Interface...22 Recommended Operating Conditions ....8 Write....22 DC Operating Characteristics..8-10 Read22 AC Operating Characteristics..10 Write Protection.23 2 I C 2-Wire Serial Interface AC Operating Configuration Registers.. 23 Characteristics-100/400khz 11 General-Purpose Memory23 Timing Diagrams 11-12 Command And Status Registers ...23 DEVICE OPERATION ADC Conversions..23 Power Graphical User Interface (GUI) ..23 Supply.14 Write Protection Register Write...24 Modes Of Operation..14 Configuration Register Read/Write...24-25 Active DC Output Control .14-15 General-Purpose Memory Read/Write..26 Power-On Cascade Sequencing.15 Command And Status Register Read/Write ...27 Ongoing Operations-Monitoring Mode .....16 ADC Conversion Read.27 Temperature Sensor Accuracy ..16 Default Configuration Register Settings.28 Margining ..17 Package..29 Power-Off Cascade Sequencing ...17 Part Marking...30 Force-Shutdown17 Ordering Information... 30 Linked Operation..... 18 Terminology And Definitions ..31 Restart... 18 Legal Notice ..32 2 I C Power-Off Control...18 Summit Microelectronics, Inc 2086 2.5 5/25/2011 2