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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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EP5357LUI датащи(PDF) 15 Page - Enpirion, Inc. |
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EP5357LUI датащи(HTML) 15 Page - Enpirion, Inc. |
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15 / 17 page  03409 September 12, 2012 Rev: D EP5357LUI/EP5357HUI ©Enpirion 2012 all rights reserved, E&OE 15 www.enpirion.com temperature, and are not suitable for switch- mode DC-DC converter input filter applications. Output Filter Capacitor For VIN ≤ 4.3V, COUT_MIN = 10uF 0603 MLCC. For VIN > 4.3V, COUT_MIN = 10uF 0805 MLCC. Ripple performance can be improved by using 2x10µF 0603 MLCC capacitors (for any allowed VIN). The maximum output filter capacitance next to the output pins of the device is 60µF low ESR MLCC capacitance. VOUT has to be sensed at the last output filter capacitor next to the EP5357xUI. Additional bulk capacitance for decoupling and bypass can be placed at the load as long as there is sufficient separation between the VOUT Sense point and the bulk capacitance. Excess total capacitance on the output (Output Filter + Bulk) can cause an over-current condition at startup. Refer to the section on Soft-Start for the maximum total capacitance on the output. The output capacitor must use a X5R or X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and temperature and are not suitable for switch- mode DC-DC converter output filter applications. Recommended PCB Footprint Figure 12: EP5357 Package PCB Footprint |
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