SUMMIT Microelectronics: Product Summary: SMM766  

Preliminary Information ¹

SMM766 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link™

FEATURES Extremely accurate (±0.2%) output voltages using Active DC Output Control (ADOC™) Sequence-Link™ provides sequencing of up to 48 channels ADOC automatically adjusts supply output voltage level under all DC load conditions Monitors, controls, and margins up to 6 supplies from 0.3V to 5.5V with 1.25V Vref Programmable power-on/-off sequencing Operates from any intermediate bus supply from 6V to 14V and from 2.7V to 5.5V Monitors 12V input VDD and temperature sensor Wide margin/ADOC range from 0.3v to VDD Monitors two general-purpose 10-bit ADC inputs •I2C 2-wire serial bus for programming configuration and monitoring status, including 10-bit ADC conversion results 2 programmable Under Voltage (UV) and Over Voltage (OV) threshold limits for each of 11 monitored inputs 2k-bit general purpose nonvolatile memory

APPLICATIONS Monitor/control distributed and POL suppliess Multi-voltage processors, DSPs, ASICSs used in telecom, CompactPCI or server systems

INTRODUCTION The SMM766 is an Active DC Output power supply Controller (ADOC™) that monitors, margins, and cascade sequences. The ADOC feature is unique and maintains extremely accurate settings of system supply voltages to within ±0.2% under full load. The SMM766 actively controls up to 6 DC/DC converters and can be linked with up to 7 other Sequence-Link™ devices to accommodate sequencing of up to 48 channels. Control of the DC-DC converters is accomplished through the use of a Trim or Regulator VADJ/FB pin to adjust the output voltage. For system test, the part also controls margining of the supplies using I2C commands. It can margin supplies with either positive or negative control within a range of 0.3V to VDD, depending on the specified range of the converter. The SMM766 also intelligently sequences or cascades the power supplies on and off in any order using enable outputs with programmable polarity. It can operate off any intermediate bus supply ranging from 6V to 14V or from 5.5V to as low as 2.7V. The part monitors 6 power supply channels as well as VDD, 12V input, two general-purpose analog inputs and an internal temperature sensor using a 10-bit ADC. The 10-bit ADC can measure the value on any one of the monitor channels and output the data via the I2C bus. A host system can communicate with the SMM766 status register, margining and utilize 2K-bits of nonvolatile memory. [continued in the PDF]

ORDERING INFORMATION