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SMM665C Datasheet(PDF) 1 Page - Summit Microelectronics, Inc.

Part No. SMM665C
Description  Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
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Maker  SUMMIT [Summit Microelectronics, Inc.]
Homepage  http://www.summitmicro.com
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SMM665C Datasheet(HTML) 1 Page - Summit Microelectronics, Inc.

 
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SMM665C
© 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: http://www.summitmicro.com/
2125 3.2 5/24/2011
1
Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
FEATURES & APPLICATIONS
• Extremely accurate (±0.2%) Active
DC Output Control (ADOC
TM)
• Undervoltage Lockout function (UVLO)
• ADOCTM 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
INTRODUCTION
The SMM665C is an Active DC Output power supply
Controller (ADOC
TM) 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 I
2C 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 I
2C bus. A host
system can communicate with the SMM665C status
register, optionally control Power-on/off, margining and
utilize 4K-bits of nonvolatile memory.
SIMPLIFIED APPLICATIONS DRAWING
TRIM
B
PUP
B
VM
B
TRIM_CAP
B
CAP
B
TRIM
A
PUP
A
VM
A
TRIM_CAP
A
CAP
A
SMM665C
μP/
ASIC
3.3VIN (+2.7V to +5.5V Range)
RESET
READY
HEALTHY
12VIN (+8V to +15V Range)
External
or
Internal
TEMP
SENSOR
AIN1
VREF_ADC
2.5VIN
1.2VIN
12V
SDA
SCL
I2C
BUS
3.3V
A2
VREF_CNTL
VIN
TRIM
Vout
DC/DC
Converter A
ON/OFF
VIN
TRIM
Vout
DC/DC
Converter B
ON/OFF
External or
Internal
REFERENCE
Environ
mental
SENSOR
AIN2
DC/DC
Converter C, E
DC/DC
Converter D, F
2 of 6 DC-DC
Converters shown
Figure 1 – Applications Schematic using the SMM665C Controller to actively control the output levels of
up to six 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.


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