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SC172MLTRT 数据表(PDF) 21 Page - Semtech Corporation |
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SC172MLTRT 数据表(HTML) 21 Page - Semtech Corporation |
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21 / 27 page ![]() © 2010 Semtech Corporation inner layers to expand the heat sinking area. On the bottom layer, the resistor network composed of R3 and R4 determines the output voltage. C7 is the feed forward capacitor which helps to stabilize the circuit. R6 in series with C9 is connected to the LX pin (through the via) to the power ground. C8 is the coupling capacitor which injects the ramp signal generated on C9 to the FB pin of the SC172. R7 is the pull up resistor for the PGOOD pin. 21 SC172 |
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