FAN5308(2005) Ver la hoja de datos (PDF) - Fairchild Semiconductor

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FAN5308
(Rev.:2005)

800mA High-Efficiency Step-Down DC-DC Converter

Fairchild Semiconductor 

Therefore, use wide traces for high current paths and place the

input capacitor, the inductor, and the output capacitor as close

as possible to the integrated circuit terminals. In order to mini-

mize voltage stress to the device resulting from ever present

switching spikes, use an input bypass capacitor with low ESR.

Note that the peak amplitude of the switching spikes depends

upon the load current; the higher the load current, the higher the

switching spikes. The resistor divider that sets the output volt-

age should be routed away from the inductor to avoid RF cou-

pling. The ground plane at the bottom side of the PCB acts as

an electromagnetic shield to reduce EMI.

For more board layout recommendations download the applica-

tion note “PCB Grounding System and FAN2001/FAN2011 High

Performance DC-DC Converters” (AN-42036).

FAN5308 Rev. 1.0.1

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