Datasheet

V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
ENABLE
(5V/Div)
I
OUT
(10A/Div)
0 3 6 9 12 15
80
82
84
86
88
90
92
94
96
98
100
EFFICIENCY (%)
OUTPUT CURRENT (A)
VIN = 3.3V
VIN = 5.0V
www.ti.com Performance Characteristics
6 Performance Characteristics
Figure 2 shows the conversion efficiency versus output current for a 5V input voltage for output voltages of
1.2V and 3.3V. The default output voltage is 1.2V.
Figure 2. Conversion Efficiency Versus Output Current
A soft-start sequence occurs when applying power to the LM21215 evaluation board. Figure 3 shows the
output voltage during a typical start-up sequence.
Figure 3. Startup Waveform (2 ms/DIV)
7
SNVA476A–March 2011–Revised May 2013 AN-2130 LM21215 Evaluation Board
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