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SMM205NR32 データシート(PDF) 1 Page - Summit Microelectronics, Inc. |
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SMM205NR32 データシート(HTML) 1 Page - Summit Microelectronics, Inc. |
1 / 20 page SMM205 Preliminary Information 1 (See Last Page) © SUMMIT Microelectronics, Inc. 2003 • 1717 Fox Drive • San Jose CA 95131 • Phone 408 436-9890 • FAX 408 436-9897 www.summitmicro.com 2069 1.4 6/23/03 1 FEATURES & APPLICATIONS • Extremely accurate (±0.1%) Active DC Output Control (ADOC) • ADOC Automatically adjusts supply output voltage level under all 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 lead QFN 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 SMM205 actively controls the output voltage level of two DC/DC converters that use a Trim or VADJ/FB pin to adjust the output. An Active DC Output Control (ADOC) 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 SMM205 checks 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 SMM205 ADOC continues to monitor and adjust the channel output at the specified level. SIMPLIFIED APPLICATIONS DRAWING START WP# VREF_CNTL TRIM_CAPA COMP1 TRIMA COMP2 READY TRIM_CAPB TRIMB VMB VMA VDD_CAP FILT_CAP SMM205 6V to 15V 2.7V to 5.5V Intermediate Bus Voltage (IBA I2C BUS A0 A2 SCL SDA A1 DC/DC V– Trim V+ Vin On/Off DC/DC V– Trim V+ Vin On/Off UV OV Processor V1 V2 GND External or Internal VREF Figure 1 – Applications Schematic showing the SMM205 ADOC actively control the DC output level of 2 DC/DC Converters as well as provide margin control. The SMM205 can operate over a wide supply range Note: This is an applications example only. Some pins, components and values are not shown. Dual Channel Supply Voltage Marginer and Active DC Output Controller |
同様の部品番号 - SMM205NR32 |
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同様の説明 - SMM205NR32 |
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