Texas Instruments LM25119EVAL, Руководство пользователя

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Waveforms
4 Waveforms
4.1 Soft Start
When applying power to the LM25119 evaluation board a certain sequence of events occurs. Soft-start
capacitors and other components allow for a linear increase in output voltages. The soft-start time of each
output can be controlled independently.
Figure 2 shows the output voltage during a typical start-up with a
load of 0.5 Ω on the 3.3V output, and 0.33 Ω on the 1.8V output, respectively.
Conditions:
Input Voltage = 12VDC
0.5
Ω Load on 3.3V output
0.33 Ω Load on 1.8V output
Traces:
Top Trace: 3.3V Output Voltage, Volt/div = 1V
Bottom Trace: 1.8V Output Voltage, Volt/div = 1V
Horizontal Resolution = 1 ms/div
Figure 2. Start-up with Resistive Load
3 SNVA445B – August 2010 – Revised April 2013 AN-2066 LM25119 Evaluation Board
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