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SMM766B Datasheet(PDF) 1 Page - Summit Microelectronics, Inc. |
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SMM766B Datasheet(HTML) 1 Page - Summit Microelectronics, Inc. |
1 / 39 page SMM766B © 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/ 2122 3.0 5/5/2008 1 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer with Sequence-Link • Extremely accurate (±0.2%) Active DC Output Control (ADOC™) • Sequence-Link™ provides sequencing of up to 48 channels • ADOC automatically adjusts supply output voltage level under all DC load conditions • Monitors, controls, and margins up to 6 supplies from 0.3V to 5.5V with 1.25V Vref • Programmable power-on/-off sequencing • Operates from any intermediate bus supply from 6V to 14V and from 2.7V to 5.5V • Monitors 12V input VDD and temperature sensor • Wide margin/ADOC range from 0.3V to VDD • Monitors two general-purpose 10-bit ADC inputs • I2C 2-wire serial bus for programming configuration and monitoring status, including 10-bit ADC conversion results • 2 programmable Under Voltage (UV) and Over Voltage (OV) threshold limits for each of 11 monitored inputs • 2k-bit general purpose nonvolatile memory Applications • Monitor/control distributed and POL supplies • Multi-voltage processors, DSPs, ASICSs used in telecom, CompactPCI or server systems The SMM766B 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 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 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 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 I 2C bus. A host system can communicate with the SMM766B status register, margining and utilize 2K- 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 SMM766B µP/ ASIC 3.3VIN (+2.7V to +5.5V Range) RESET# READY HEALTHY 12VIN (+6V to +14V Range) External or Internal TEMP SENSOR AIN1 2.5VIN 1.2VIN 12V SDA SCL I2C BUS 3.3V A2 VREF VIN TRIM Vout DC/DC Converter A ON/OFF VIN TRIM Vout DC/DC Converter B ON/OFF External or Internal REFERENCE Environmental SENSOR AIN2 DC/DC Converter C, E DC/DC Converter D, F 2 of 6 DC-DC Converters shown SEQ_LINK Figure 1 – Applications schematic using the SMM766B controller to actively control the output levels of up to 6 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. INTRODUCTION FEATURES & APPLICATIONS |
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