Datasheet

LTC3850/LTC3850-1
6
38501fc
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step
(Burst Mode Operation)
Load Step
(Forced Continuous Mode)
Load Step
(Pulse-Skipping Mode)
Inductor Current at Light Load
Coincident Tracking
Prebiased Output at 2V
40µs/DIV
V
OUT
100mV/DIV
AC COUPLED
I
L
2A/DIV
I
LOAD
2A/DIV
200mA TO 2.5A
38501 G04
CIRCUIT OF FIGURE 14
V
IN
= 12V, V
OUT
= 1.8V
40µs/DIV
CIRCUIT OF FIGURE 14
V
IN
= 12V, V
OUT
= 1.8V
I
L
2A/DIV
I
LOAD
2A/DIV
200mA TO 2.5A
V
OUT
100mV/DIV
AC COUPLED
38501 G05
40µs/DIV
I
L
2A/DIV
I
LOAD
2A/DIV
200mA TO 2.5A
V
OUT
100mV/DIV
AC COUPLED
38501 G06
CIRCUIT OF FIGURE 14
V
IN
= 12V, V
OUT
= 1.8V
1µs/DIV
Burst Mode
OPERATION
2A/DIV
FORCED
CONTINUOUS
MODE
2A/DIV
PULSE-SKIPPING
MODE
2A/DIV
38501 G07
CIRCUIT OF FIGURE 14
V
IN
= 12V, V
OUT
= 1.8V
I
LOAD
= 100µA
2.5ms/DIV
V
OUT
2V/DIV
V
FB
500mV/DIV
38501 G08
V
TK/SS
500mV/DIV
1ms/DIV
RUN1
2V/DIV
V
OUT1
, 3.3V
3Ω LOAD, 1V/DIV
V
OUT2
, 1.8V
1.5Ω LOAD
1V/DIV
38501 G09