EUP2518
Layout Considerations
The input bypass capacitor C2, as shown in Figure 1,
must be placed close to the IC. This will reduce copper
trace resistance which effects input voltage ripple of the
IC. The output capacitor, C1, should also be placed close
to the IC. Any copper trace connections for the C1
capacitor can increase the series resistance, which
directly effects output voltage ripple. The feedback
resistors RFB should be kept close to the FB pin to
minimize copper trace connections that can inject noise
into the system. The ground connection for the feedback
resistor network should connect directly to GND pin.
Trace connections made to the inductor and schottky
diode should be minimized to reduce EMI and increase
overall efficiency.
DS2518 Ver1.0 Mar. 2008
7
EUTECH [ EUTECH MICROELECTRONICS INC ]
