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ACE722 Datasheet(PDF) 4 Page - ACE Technology Co., LTD. |
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ACE722 Datasheet(HTML) 4 Page - ACE Technology Co., LTD. |
4 / 8 page ACE722 2A Step-down DC-DC Converter VER1.6 4 Demo Board Bom No. Reference Type Specification Note 1 C1 Capacitor MLCC 10uF; SMD 0805 2 C2 Capacitor MLCC 10uF; SMD 0805 3 D1 Diode SS34; 40V, 3A; SMD, Shielding 4 L1 Inductor 10uH; 3A; SMD; Shielding 5 IC1 IC ACE722; SMD SOP-8 6 R1 Resistor SMD 0805; 30K; 1% 7 R2 Resistor SMD 0805; 10K; 1% Layout consideration Careful PCB layout is critical to achieving low switching losses and clean, stable operation. The switching power stage requires particular attention. If possible, mount all the power components on one side of the board, with their ground terminals as close to one another as possible. Keep the high-current paths short, especially the distance between Cin and the Vin (GND) terminals. It is essential for stable, jitter-free operation, showing as the following figure. The ESR of Cin should be smaller enough and the capacitance of Cin should be large enough for filtering the switching noise across power path, a 10uF ceramic capacitor is recommended. Keep the trace connecting to SW terminal wide enough for heat dissipation, if possible, it is better to place some vias connected to the bottom copper for enhancement. Route high-speed switching nodes, for example SW terminal, away from sensitive analog trace (eg. FB terminal). |
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Similar Description - ACE722 |
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