SMM605 Six-Channel Supply Voltage Marginer and Active DC Output Controller (ADOC™)

 

SMM665B

Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer

FEATURES
	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

 
INTRODUCTION

The SMM665B 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 SMM665B 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 SMM665B status register, optionally control Power-on/off, margining and utilize 4K-bits of nonvolatile memory.