Datasheet

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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 = 24VDC
0.5Ω Load on the Output
Traces:
Top Trace: Output Voltage, Volt/div = 1V
Bottom Trace: Inductor Current, Amp/div = 2A
Horizontal Resolution = 1ms/div
Figure 6. Shutdown
3.6 Performance Characteristics
Figure 7 shows the efficiency curves. During the efficiency measurement, monitor the current into and out
of the evaluation board and monitor the voltage directly at the input and output terminals of the evaluation
board.
Figure 7. Typical Efficiency vs Load Current
5
SNVA469B–May 2011–Revised April 2013 AN-2112 LM25117 Evaluation Board
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