ELECTRICAL CHARACTERISTICS CURVES
Figure 17: Input Terminal Ripple Current-ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (500 mA/div, 2us/div).
Figure 18: Input reflected ripple current-is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div).
Vo(+)
CopperStrip
10u | 1u | SCOPE RESISTIV | |
LOAD | |||
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Figure 19: Output voltage noise and ripple measurement test setup
Figure 20: Output voltage ripple at nominal input voltage and rated load current (Iout1=Iout2=15A)(20 mV/div, 1us/div). Top trace: Vout2(20mV/div), Bottom trace(20mV/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
8
DS_Q48DR1R533_03152007
