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ACE722G bảng dữ liệu(PDF) 11 Page - ACE Technology Co., LTD. |
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ACE722G bảng dữ liệu(HTML) 11 Page - ACE Technology Co., LTD. |
11 / 13 page ACE722G 5V 2.0A, 1.3MHz Synchronous Buck Converter VER 1.1 11 Output Capacitor and Inductor Selection Follow the below table for Inductor and Output cap selection: VOUT 1.2V 1.5V 1.8V 2.5V 3.3V COUT 33 F 33 F 22 F 22 F 10 F L 1.5 H 1.5 H 2.2 H 3.3 H 4.7 H If much smaller values are used, inductor current rises, and a larger output capacitance may be required to suppress output ripple. Larger values than LIDEAL can be used to obtain higher output current, but typically with larger inductor size. Application Information Layout is critical to achieve clean and stable operation. The switching power stage requires particular attention. Follow these guidelines for good PC board layout: (1) Place decoupling capacitors as close to the IC as possible (2) Connect input and output capacitors to the same power ground node with a star ground configuration then to IC ground. (3) Keep the high-current paths as short and wide as possible. Keep the path of switching current (C1 to IN and C1 to GND) short. Avoid vias in the switching paths. (4) If possible, connect IN, SW, and GND separately to a large copper area to help cool the IC to further improve efficiency and long-term reliability. (5) Ensure all feedback connections are short and direct. Place the feedback resistors as close to the IC as possible. (6) Route high-speed switching nodes away from sensitive analog area. |
Số phần tương tự - ACE722G |
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Mô tả tương tự - ACE722G |
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