Datasheet

V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
ENABLE
(5V/Div)
V
OUT
(500 mV/Div)
V
PGOOD
(5V/Div)
V
ENABLE
(5V/Div)
I
OUT
(10A/Div)
V
OUT
(50 mV/Div)
I
OUT
(5A/Div)
V
OUT
(10 mV/Div)
V
OUT
(200mV/Div)
V
SYNC
(2V/Div)
V
SWITCH
(2V/Div)
V
OUT
(200 mV/Div)
V
SYNC
(2V/Div)
V
SWITCH
(2V/Div)
LM21212-1
SNVS671E –FEBRUARY 2011–REVISED MARCH 2013 www.ti.com
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
= 1 MHz, T
A
= 25°C for
efficiency curves, loop gain plots and waveforms, and T
J
= 25°C for all others.
SYNC Signal Lost SYNC Signal Acquired
4 µs/DIV
4 µs/DIV
Figure 17. Figure 18.
Load Transient Response Output Voltage Ripple
100 µs/DIV 1 µs/DIV
Figure 19. Figure 20.
Startup with Prebiased Output Startup with SS/TRK Open Circuit
200 µs/DIV
2 ms/DIV
Figure 21. Figure 22.
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