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SMM105NER00 数据表(PDF) 1 Page - Summit Microelectronics, Inc. |
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SMM105NER00 数据表(HTML) 1 Page - Summit Microelectronics, Inc. |
1 / 21 page SMM105 Preliminary Information 1 (See Last Page) © SUMMIT Microelectronics, Inc. 2005 • 1717 Fox Drive • San Jose CA 95131 • Phone 408 436-9890 • FAX 408 436-9897 www.summitmicro.com 2068 1.8 09/20/05 1 FEATURES & APPLICATIONS • Extremely accurate (±0.1%) Active DC Output Control (ADOCTM) • ADOC Automatically adjusts supply output voltage level under all DC load conditions • Capable of margining supplies with trim inputs using either positive or negative trim pin control • Wide Margin/ADOC range from 0.3V to VDD • Uses either an internal or external VREF • Operates from any intermediate bus supply from 8V to 15V and from 2.7V to 5.5V • Programmable START and READY pins • Two programmable general purpose monitor sensors – UV and OV with FAULT Output Flag • General Purpose 1k EEPROM with Write Protect • I2C 2-wire serial bus for programming configuration and monitoring status. • 28 pad QFN or 25 ball Ultra CSPTM (Chip-Scale) package Applications • In-system test and control of Point-of-Load (POL) Power Supplies for Multi-voltage Processors, DSPs and ASICs • Enterprise and edge routers, servers, Storage Area Networks INTRODUCTION The SMM105 actively controls the output voltage level of a DC/DC converter that uses a Trim or VADJ/FB pin to adjust the output. An Active DC Output Control (ADOC TM) feature is used during normal operation to maintain extremely accurate settings of supply voltages and, during system test, to control margining of the supplies using I 2C commands. Total accuracy with a ±0.1% external reference is ±0.2%, and ±0.5% using the internal reference. The device can margin supplies with either positive or negative trim pin control within a range of 0.3V to VDD. The SMM105 supply can be from 12V, 8V, 5V or 3.3V to as low as 2.7V to accommodate any intermediate bus supply. The voltage settings (margin high/low and nominal) are programmed into nonvolatile memory through the industry standard I 2C 2-wire data bus. The I2C bus is also used to enable margin high, margin low, ADOC or normal operation. When margining, the SMM105 will check the voltage output of the converter and make adjustments to the trim pin via a feedback loop to bring the voltage to the margin setting. A margining status register is set to indicate that the system is ready for test. The SMM105 ADOC will continue to monitor and adjust the channel output at the specified level. SIMPLIFIED APPLICATIONS DRAWING VIN TRIM V+ V- VM FILT_CAP TRIM_CAP SMM105 uP/ DSP/ FPGA/ ASIC Internal or External Voltage Reference VREF_CNTL GND 1.2 VIN SDA SCL I2C BUS 3.3/5Vin (2.7V to 5.5V) READY 12VIN (6V to 15V) VDD_CAP POWER GOOD A2 A1 A0 WP# FAULT# FAULT# COMP1 COMP2 DC/DC Converter TRIM VM ON/OFF UV OV GND Figure 1 – Applications Schematic using the SMM105 Controller to actively control the DC output level (ADOC) of a DC/DC Converter as well as margin control. The SMM105 can operate over a wide supply range Note: This is an applications example only. Some pins, components and values are not shown. Single-Channel Supply Voltage Marginer and Active DC Output Controller |
类似零件编号 - SMM105NER00 |
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类似说明 - SMM105NER00 |
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