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FAN5070 数据表(PDF) 1 Page - Fairchild Semiconductor |
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FAN5070 数据表(HTML) 1 Page - Fairchild Semiconductor |
1 / 14 page www.fairchildsemi.com Pentium is a registered trademark of Intel Corporation. Programmable Active Droop is a trademark of Fairchild Semiconductor. REV. 1.0.1 8/7/01 Features • Output programmable in 25mV steps from 1.05V to 1.825V using a dynamically programmable integrated 5-bit DAC • Remote sense • Programmable Active Droop™ up to 200mV • Drives N-Channel MOSFETs • Overcurrent protection using MOSFET sensing • Overvoltage protection including startup • 85% efficiency typical at full load • Integrated Power Good and Enable/Soft Start functions • Meets Intel VRM8.5 specifications using minimum number of external components • 20 pin SOIC package Applications • Power supply for Pentium® III Platforms • VRM for Pentium III processor • Programmable power supply Description The FAN5070 is a synchronous mode DC-DC controller IC which provides a highly accurate, programmable output volt- age for platforms such as the Intel Pentium III, and provides a complete solution for all Intel VRM8.5 CPU applications, and for other high-performance processors. The FAN5070 features remote voltage sensing, independently adjustable current limit, and a proprietary wide-range Programmable Active Droop™ for optimal converter transient response and VRM8.5 compliance. The FAN5070 uses a 5-bit D/A con- verter to dynamically program the output voltage during oper- ation from 1.05V to 1.825V in 25mV steps. The FAN5070 uses a high level of integration to deliver load currents in excess of 28A from a 5V source with minimal external circuitry. Synchronous-mode operation offers optimum efficiency over the entire specified output voltage range. An on-board precision low TC reference achieves 0.8% voltage regulation without expensive external components. The FAN5070 also offers integrated functions including open- collector Power Good, Output Enable/Soft Start and current limiting, and is available in a 20 pin SOIC package. Block Diagram VID3 VID2 VID1 12 VID0 GNDP 19 18 2 14 20 1 13 - + - + OSC 1.24V Reference Digital Control Power Good 5-Bit DAC VID4 87 6 5 4 +5V +12V PWRGD - + ENABLE/SS VCC GNDA 3 LODRV HIDRV VCCP 17 VCCA +5V 16 15 OCL - + RD RS - + FAN5070 High Performance Programmable Synchronous DC-DC Controller |
类似零件编号 - FAN5070 |
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类似说明 - FAN5070 |
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