Datasheet

V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
ENABLE
(5V/Div)
I
OUT
(10A/Div)
0 2 4 6 8 10 12
80
82
84
86
88
90
92
94
96
EFFICIENCY (%)
OUTPUT CURRENT (A)
500kHz
1MHz
1.5MHz
Performance Characteristics www.ti.com
5 Performance Characteristics
Efficiency Plots
Figure 2 shows the conversion efficiency versus output current for a 5V input voltage for 500kHz, 1MHz,
and 1.5MHz f
SW
.
Figure 2. Efficiency Plots
Turn-On Waveform
A soft-start sequence occurs when applying power to the LM21212-2 evaluation board. Figure 3 shows
the output voltage during a typical start-up sequence.
Figure 3. (2 ms/DIV)
4
AN-2140 LM21212-2 Evaluation Board SNVA480A–May 2011–Revised May 2013
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