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3.5.5 Shutdown
Figure 6 shows the shutdown procedure by powering off the source power. When UVLO pin voltage is
less than 1.26V, the switching stops and soft-start capacitor is discharged by internal switches.
Conditions:
Input Voltage = 48VDC
1.5Ω Load on the Output
Traces:
Top Trace: Output Voltage, Volt/div = 5V
Bottom Trace: Inductor Current, Amp/div = 5A
Horizontal Resolution = 2ms/div
Figure 6. Shutdown
7
SNVA466B–May 2011–Revised April 2013 AN-2103 LM25117 Evaluation Board
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