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AME5253 Datasheet(PDF) 10 Page - Analog Microelectronics |
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AME5253 Datasheet(HTML) 10 Page - Analog Microelectronics |
10 / 18 page AME 10 1A, 1.5MHz Synchronous Step-Down Converter AME5253 Rev.A.04 Figure 9: AME5253 Adjustable Voltage Regulator Layout Diagram PC Board Layout Checklist When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the AME5253. These items are also illustrated graphically in Figures 9. Check the following in your layout: 1. The power traces, consisting of the GND trace, the SW trace and the V IN trace should be kept short, direct and wide. 2. Does the V FB pin connect directly to the feedback resistors? The resistive divider R2/R1 must be connected between the (+) plate of C OUT and ground. 3. Does the (+) plate of CIN connect to V IN as closely as possible? This capacitor provides the AC current to the internal power MOSFETs. 4. Keep the switching node, SW, away from the sensitive V FB node. 5. Keep the (-) plates of C IN and COUT as close as possible. R2 R1 L1 CFWD AME5253 IN EN GND SW FB VOUT COUT CFWD: 22pF~220 pF CIN VIN |
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