SUMMIT Microelectronics: Product Summary: SMM764  

Preliminary Information ¹

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

	SMM764
	Four-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 46 channels ADOC automatically adjusts supply output voltage level under all DC load conditions Monitors, controls and margins up to 4 supplies from 0.3V to 5.5V 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 9 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 SMM764 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 SMM764 actively controls up to 4 DC/DC converters and can be linked with up to 7 other Sequence-Link™ devices to accommodate sequencing of up to 46 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 SMM764 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 4 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 SMM764 status register, margining and utilize 2K-bits of nonvolatile memory. [continued in the PDF]

ORDERING INFORMATION

 

NOTE 1 - This is a Preliminary Information data sheet that describes a Summit product currently in pre-production with limited characterization. Revision 1.1 - This document supersedes all previous versions. SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission. SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances. ADOC™ and Sequence-Link™ are registered trademarks of Summit Microelectronics Inc., I2C is a trademark of Philips Corporation.