Applications Note 70: SMM766/SMM766B Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer Design Guide for Calculating Series TRIM Resistor Values
Applications Note 33 - SMM665B/665C Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer, Windows GUI Users Guide and Configuration Register Descriptions
Extremely accurate (±0.2%) Active DC Output Control (ADOC™)
Undervoltage Lockout function (UVLO)
ADOC Automatically adjusts supply output voltage level under all DC load conditions
Monitors, controls, sequences and margins up to six supplies from 0.3V to 5.5V with 1.25V Vref
Wide Margin/ADOC range from 0.3V to VDD
Programmable Power-on/-off sequencing
Monitors internal temperature sensor
Operates from any intermediate bus supply from 8V to 15V and from 2.7V to 5.5V
Monitors 12V input and VDD
Monitors two general-purpose 10-bit ADC inputs
Programmable threshold limits (2 OV/2 UV) for each monitored input
Programmable RESET, HEALTHY and FAULT
4k-bit general purpose nonvolatile memory
I²C 2-wire serial bus for programming configuration and monitoring status, including 10-bit ADC conversion results
APPLICATIONS
Monitor/Control Distributed and POL Supplies
Multi-voltage Processors, DSPs, ASICs used in Telecom, CompactPCI or server systems
SMM665C: Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
INTRODUCTION
The SMM665C 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 device actively controls up to six DC/DC converters that use 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 SMM665C 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 8V to 15V or from 5.5V to as low as 2.7V. The part monitors six 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 SMM665C status register, optionally control Power-on/off, margining and utilize 4K-bits of nonvolatile memory.
NOTE 1 - This is a final data sheet that describes a Summit product currently in production.
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.
Revision 3.1 - This document supersedes all previous versions.
ADOC™ is a registered trademark of Summit Microelectronics Inc., I2C is a trademark of Philips Corporation.
