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SMM465FCR01 Datasheet(PDF) 1 Page - Summit Microelectronics, Inc. |
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SMM465FCR01 Datasheet(HTML) 1 Page - Summit Microelectronics, Inc. |
1 / 30 page SMM465 Preliminary Information 1 (See Last Page) © SUMMIT Microelectronics, Inc. 2004 • 1717 Fox Drive • San Jose CA 95131 • Phone 408 436-9890 • FAX 408 436-9897 www.summitmicro.com 2085 1.1 05/27/04 1 4-Channel Active DC Output Controller, Monitor, Marginer and Sequencer FEATURES & APPLICATIONS • Extremely accurate (±0.1%) 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 4 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 SMM465 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 four 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 SMM465 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 four 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 SMM465 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 SMM465 µP/ ASIC 3.3VIN (+2.7V to +5.5V Range) RESET READY HEALTHY 12VIN (+6V 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 DC/DC Converter D 2 of 4 DC-DC Converters shown Figure 1 – Applications Schematic using the SMM465 Controller to actively control the output levels of up to four 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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