NTA Series
Isolated 1W Dual Output SM DC/DC Converters
KDC_NTA.I07 Page 4 of 6
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APPLICATION NOTES (continued)
Output Ripple Reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.
The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC/DC converter.
Inductor: The rated current of the inductor should not be less than that of the output of the DC/DC converter. At the rated current, the DC resistance of the inductor
should be such that the voltage drop across the inductor is <2% of the rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should be
>20MHz.
Inductor Capacitor
L, µH SMD Through Hole C, µF
NTA0303MC 10 82103C 11R103C 4.7
NTA0305MC 22 82223C 11R223C 2.2
NTA0309MC 22 82223C 11R223C 2.2
NTA0312MC 22 82473C 11R473C 1
NTA0315MC 22 82474C 11R474C 1
NTA0503MC 10 82103C 11R103C 4.7
NTA0505MC 10 82103C 11R103C 4.7
NTA0505MEC 10 82103C 11R103C 4.7
NTA0509MC 22 82223C 11R223C 2.2
NTA0512MC 22 82473C 11R473C 1
NTA0515MC 22 82474C 11R474C 1
NTA1205MC 10 82103C 11R103C 4.7
NTA1209MC 22 82223C 11R223C 2.2
NTA1212MC 22 82473C 11R473C 1
NTA1215MC 22 82474C 11R474C 1
DC
DC
L
L
C
C
Load
Load
Power
Source
+V
OUT
OV
-V
OUT