SMM665C(2011) データシート - Summit Microelectronics

INTRODUCTION
   The SMM665C is an Active DC Output power supply Controller (ADOCTM) 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.

FEATURES & APPLICATIONS
• Extremely accurate (±0.2%) Active
   DC Output Control (ADOCTM)
• 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