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FAN1655M Arkusz danych(PDF) 1 Page - Fairchild Semiconductor |
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FAN1655M Arkusz danych(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page ©2006 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com January 2006 FAN1655 Rev. 1.1.5 FAN1655 3A DDR Bus Termination Regulator Description The FAN1655 is a low-cost bi-directional LDO specifically designed for terminating DDR memory bus. It can both sink and source up to 2.1A continuous, 3A peak, providing enough current for most DDR appli- cations. Load regulation meets the JEDEC spec, VTT = VREFOUT ± 40mV. The FAN1655 includes a buffered reference voltage capable of supplying up to 5mA current. On-chip thermal limiting provides protection against a combination of power overload and ambient temperature that would create an excessive junction temperature. A shutdown input puts the FAN1655 into a low power mode. The FAN1655 regulator is available in a power-enhanced eTSSOP™-16, standard SOIC-14, and an 8-Lead MLP package. Features ■ Sinks and sources 2.1A continuous, 3A peak ■ 0 to +125°C operating temperature range ■ 5mA Buffered VREFOUT = VDDQ/2 ■ Load regulation: VTT = VREFOUT ± 40mV ■ On-chip thermal limiting ■ Low Cost SO-14, Power-Enhanced eTSSOP or 8-pin 5x6mm MLP packages ■ Low-Current Shutdown Mode ■ Output Short Circuit Protection Applications ■ DDR Terminator VTT supply Ordering Information Block Diagram Part Number Temperature Range Package Packing FAN1655M 0°C to 125°C SOIC-14 Rails FAN1655MX 0°C to 125°C SOIC-14 Tape and Reel FAN1655MTF 0°C to 125°C eTSSOP-16 Rails FAN1655MTFX 0°C to 125°C eTSSOP-16 Tape and Reel FAN1655MPX 0°C to 125°C MLP-8 Tape and Reel VSS VSS VSS + – VTTSENSE VTTFORCE VTTFORCE + – VDD VDD VDD SHDN VDDQ 200k 200k FAN1655 VSSQ VREFIN VREFOUT |
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