Datasheet

V
SW
(2V/Div)
V
OUT
(1V/Div)
I
L
(10A/Div)
V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
TRACK
(500 mV/Div)
I
OUT
(10A/Div)
V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
ENABLE
(5V/Div)
I
OUT
(10A/Div)
V
OUT
(10 mV/Div)
V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
ENABLE
(5V/Div)
LM21215A
www.ti.com SNOSB87B –MARCH 2011–REVISED MARCH 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise specified: V
VIN
= 5V, V
OUT
= 1.2V, L= 0.56µH (1.8mΩ R
DCR
), C
SS
= 33nF, f
SW
= 500 kHz, T
A
= 25°C for
efficiency curves, loop gain plots and waveforms, and T
J
= 25°C for all others.
Output Voltage Ripple Startup with Prebiased Output
Figure 20. 2 µs/DIV Figure 21. 2 ms/DIV
Startup with SS/TRK Open Circuit Startup with applied Track Signal
Figure 22. 200 µs/DIV Figure 23. 200 ms/DIV
Output Over-Current Condition
Figure 24. 10 µs/DIV
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