AT1366B Datasheet, PDF (12/14 Pages) Aimtron Technology – 1MHz,800mA Synchronous Buck Converter

PC Board Layout
AT1366B
Preliminary Product Information
1MHz,800mA Synchronous Buck Converter
1. The most critical aspect of the layout is the placement of the input capacitor C1. It
must be placed as close as possible to the AT1366B to reduce the input ripple
voltage.
2. Power loops on the input and output of the converter should be laid out with the
shortest and widest traces possible. The longer and narrower the trace, the higher
resistance and inductance it will have. The length of traces in series with the
capacitors increases its ESR and ESL and reduces their effectiveness at high
frequency.
3. The FB pin should connect to feedback resistors directly. And the route should be
away from the noise source, such as inductor of SW line.
4. Grounding all components at the same point may effectively reduce the occurrence
of loop.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone] Fax: [phone]
WWW: http://www.aimtron.com.tw
1/18/2006 REV:1.2
Email:[e-mail]
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