LM5642MH NSC [National Semiconductor], LM5642MH Datasheet - Page 22

• Manufacturer Part Number: LM5642MH
• Description: High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
• Manufacturer: NSC [National Semiconductor]

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have relatively high impedance connections to the internal
planes. If high switching currents must be routed through vias
and/or internal planes, use multiple vias in parallel to reduce
their resistance and inductance. The power components
22
should be kept close together. The longer the paths that con-
nect them, the more they act as antennas, radiating unwanted
EMI.
Please see AN-1229 for further PCB layout considerations.