ltc3850gn-2 Linear Technology Corporation, ltc3850gn-2 Datasheet - Page 5

• Manufacturer Part Number: ltc3850gn-2
• Description: Dual, 2-phase Synchronous Step-down Switching Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
200mA TO 2.5A
200mA TO 2.5A
AC COUPLED
AC COUPLED
100mV/DIV
500mV/DIV
100mV/DIV
2A/DIV
2A/DIV
2V/DIV
2A/DIV
2A/DIV
I
I
V
V
V
LOAD
LOAD
OUT
OUT
OUT
V
FB
I
I
L
L
CIRCUIT OF FIGURE 14
V
Load Step
(Pulse-Skipping Mode)
CIRCUIT OF FIGURE 14
V
Prebiased Output at 2V
Load Step
(Burst Mode Operation)
IN
IN
= 12V, V
= 12V, V
OUT
OUT
= 1.8V
= 1.8V
2.5ms/DIV
40μs/DIV
40μs/DIV
500mV/DIV
V
TK/SS
38502 G06
38502 G08
38502 G04
PULSE-SKIPPING
200mA TO 2.5A
CONTINUOUS
AC COUPLED
V
OPERATION
Burst Mode
1.5Ω LOAD
100mV/DIV
OUT2
FORCED
2V/DIV
1V/DIV
2A/DIV
2A/DIV
MODE
2A/DIV
2A/DIV
MODE
2A/DIV
RUN1
, 1.8V
I
V
LOAD
OUT
I
L
CIRCUIT OF FIGURE 14
V
I
CIRCUIT OF FIGURE 14
V
Inductor Current at Light Load
Coincident Tracking
Load Step
(Forced Continuous Mode)
LOAD
IN
IN
= 12V, V
= 12V, V
= 100μA
OUT
OUT
= 1.8V
= 1.8V
40μs/DIV
1ms/DIV
1μs/DIV
V
3Ω LOAD, 1V/DIV
OUT1
, 3.3V
38502 G09
38502 G05
38502 G07
LTC3850-2
38502f
5