ELECTRICAL CHARACTERISTICS CURVES
Figure 11: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (200mA/div, 1us/div)
Figure 12: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 1us/div)
Vo(+)
Copper Strip
10u | 1u | SCOPE | RESISTIV |
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Figure 13: Output voltage noise and ripple measurement test setup
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(V) | 4.2 |
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3.6 |
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VOLTAGE |
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2.4 |
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OUTPUT | 3 |
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1.2 |
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| 0 |
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| 0 | 1 | 2 | 3 | 4 | |||
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| OUTPUT CURRENT (A) |
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Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=3A)(20 mV/div, 1us/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
Figure 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points
DS_S48SE05003_12292006
5
