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RC5057 数据表(PDF) 1 Page - Fairchild Semiconductor |
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RC5057 数据表(HTML) 1 Page - Fairchild Semiconductor |
1 / 20 page www.fairchildsemi.com Pentium is a registered trademark of Intel Corporation Rev. 1.2.0 Features • Programmable output from 1.3V to 3.5V using an integrated 5-bit DAC • Remote sense • Active Droop • 85% efficiency typical at full load • Integrated Power Good and Enable/Soft Start functions • Drives N-channel MOSFETs • Overcurrent protection using MOSFET sensing • 16 pin SOIC package • Meets Intel Pentium II & III specifications using minimum number of external components Applications • Power supply for Pentium® II & III • VRM for Pentium II & III processor • Telecom line cards • Routers, switches & hubs • Programmable step-down power supply Description The RC5057 is a synchronous mode DC-DC controller IC which provides a highly accurate, programmable output voltage for all Pentium II & III CPU applications and other high-perfor- mance processors. The RC5057 features remote voltage sensing, adjustable current limit, and active droop for optimal converter transient response. The RC5057 uses a 5-bit D/A converter to program the output voltage from 1.3V to 3.5V. The RC5057 uses a high level of integration to deliver load cur- rents in excess of 16A from a 5V source with minimal exter- nal circuitry. Synchronous-mode operation offers optimum efficiency over the entire specified output voltage range. An on-board precision low TC reference achieves tight tolerance voltage regulation without expensive external components, while active droop permits exact tailoring of voltage for the most demanding load transients. The RC5057 also offers integrated functions including Power Good, Output Enable/ Soft Start and current limiting, and is available in a 16 pin SOIC package. Block Diagram 1 VID0 GNDP 7 6 10 3 8 9 2 - + - + OSC 1.24V Reference Digital Control 5-Bit DAC VID1 VID2 VID3 VID4 16 15141312 +5V +12V PWRGD - + ENABLE/SS VO GNDA 11 LODRV HIDRV VCCP RS 5 VCCA +5V 4 + - Power Good RC5057 High Performance Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors |
类似零件编号 - RC5057 |
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类似说明 - RC5057 |
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