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59PR9876N Datasheet(PDF) 1 Page - International Rectifier |
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59PR9876N Datasheet(HTML) 1 Page - International Rectifier |
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1 / 17 page  IRDC3899-P1V2 12/8/2011 1 USER GUIDE FOR IR3899 EVALUATION BOARD 1.2Vout DESCRIPTION The IR3899 is a synchronous buck converter, providing a compact, high performance and flexible solution in a small 4mm X 5 mm Power QFN package. Key features offered by the IR3899 include internal Digital Soft Start/Soft Stop, precision 0.5Vreference voltage, Power Good , thermal protection, programmable switching frequency, Enable input, input under-voltage lockout for proper start-up, enhanced line/ load regulation with feed forward, external frequency synchronization with smooth clocking, internal LDO and pre-bias start- up. Output over-current protection function is implemented by sensing the voltage developed across the on-resistance of the synchronous Mosfet for optimum cost and performance and the current limit is thermally compensated. This user guide contains the schematic and bill of materials for the IR3899 evaluation board. The guide describes operation and use of the evaluation board itself. Detailed application information for IR3899 is available in the IR3899 data sheet. BOARD FEATURES • V in = +12V (+ 13.2V Max) •Vout = +1.2V @ 0- 9A • F s=600kHz • L= 0.51uH • C in= 4x10uF (ceramic 1206) + 1X330uF (electrolytic) • C out=6x22uF (ceramic 0805) SupIRBuckTM |
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