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SMM766B BLOCK DIAGRAM
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SMM766 PINOUTS
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SMM766 SIMPLIFIED APPLICATIONS DRAWING
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• Also see: SMM764 - Four-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link™
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SMM766B
Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link™
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FEATURES
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Extremely accurate (±0.2%) Active DC Output
Control (ADOC™) |
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Sequence-Link™ provides sequencing of up to 48 channels |
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ADOC automatically adjusts supply output voltage level under all DC load conditions |
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Monitors,
controls, and
margins up to 6
supplies from
0.3V to 5.5V
with 1.25V
Vref |
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Programmable power-on/-off sequencing |
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Operates
from any
intermediate
bus supply from
6V to 14V and
from 2.7V to
5.5V |
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Monitors
12V input VDD
and temperature
sensor |
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Wide
margin/ADOC
range from 0.3v
to VDD |
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Monitors
two
general-purpose
10-bit ADC
inputs |
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•I2C
2-wire serial
bus for
programming
configuration
and monitoring
status,
including
10-bit ADC
conversion
results |
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2
programmable
Under Voltage
(UV) and Over
Voltage (OV)
threshold
limits for each
of 11 monitored
inputs |
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2k-bit
general purpose
nonvolatile
memory |
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APPLICATIONS
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Monitor/control distributed and POL suppliess |
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Multi-voltage
processors,
DSPs, ASICSs
used in
telecom,
CompactPCI or
server
systems |
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INTRODUCTION
The SMM766B 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 SMM766B 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 SMM766B 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 SMM766B status register, margining and utilize 2Kbits of nonvolatile memory.
 [continued in the PDF]
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ORDERING INFORMATION
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Revision 3.0 - 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.
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Copyright©1999- Summit
Microelectronics,
Inc.
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