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Test Load Transient Response
To test the load transient response, generate a load current transient at the output and observe the output
voltage response using an oscilloscope. Attach the current probe to the wire between the output and the load
to capture the current transient waveform. The method of testing the output voltage load transient response is
the same as that of testing output voltage ripple.
Measuring Efficiency
The Efficiency is measured by comparing the input power with the output power. Measure the input and output
voltage as close as possible to the input and output capacitor to reduce the effect of voltage drops in the PCB
and connectors.
Test Results
CMI 305 PWRHLD start up sequence
OUT1
OUT2
OUT4
OUT3
OUT5
2ms/div
Innovative Power
TM
TM
is a trademark of Active-Semi.
ActiveSwitcher
Efficiency@Vin=5V
100%
80%
60%
40%
20%
0%
0
200
400
600
Output Currentt(mA)
2V/div
1V/div
PWREN
2V/div
OUT6
2V/div
5V/div
OUT7
5
Rev 3.0, 25-Sep-2018
OUT1
OUT2
OUT3
800
1000
1200
PWR Startup Sequence
20ms/div
UG109
5V/div
0.5V/div
0.5V/div
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