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FAN5029 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN5029 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 3 page © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5029 Rev. 1.1.3 January 2007 FAN5029 8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller Features • Selectable 2-, 3-, 4-, or 5-phase operation at up to 1MHz per phase • ±7.7mV worst-case differential sensing error • Active current balancing between the output phases • Power good and crowbar blanking supports on-the- fly VID code changes • Selectable VR10 extended (7-bit) and VR11 (8-bit) VID tables • Programmable short-circuit protection and latch-off delay • Programmable soft start ramp Applications • Desktop PC/Server processor power supplies for existing and next generation Intel processors • VRM modules products Part Numbers • FAN5029MPX is not for new designs. • The FAN5029MPX_NAAC238 replaces the FAN5029MPX and is compatible with all VR10 and VR11 processors. Description The FAN5029 is a multi-phase buck switching regulator controller optimized to convert a 12V input supply to the processor core voltage required by high- performance Intel® processors. It has an internal 8-bit DAC that converts a digital voltage identification (VID) code that is sent from the processor to set the output voltage between 0.5V and 1.6V. It outputs a PWM to external MOSFET drivers that, in turn, drive the switching power MOSFETs. The switching frequency of the design is programmable by a single resistor value and the number of phases can be programmed to support 2-, 3-, 4-, or 5-phase applications. The FAN5029 also includes programmable no-load offset and droop functions to adjust the output voltage as a function of the load current, as required by the Intel specifications. The FAN5029 also provides an accurate and reliable short-circuit protection function with an adjustable over-current set point. The FAN5029 is specified over the extended commercial temperature range of 0°C to +85°C and is available in a 40-lead MLP package. Ordering Information Part Number Temperature Range Package Type Lead Free Packing Method Quantity per Reel FAN5029MPX Not For New Designs FAN5029MPX_NAAC238 0°C to 85°C MLP-40 Yes Tape and Reel 3,000 For more information, please contact Ron Berthiaume at ronald.berthiaume@fairchildsemi.com. |
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