Datasheet

4
LTC3834-1
38341f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
T
A
= 25ºC, unless otherwise noted.
Efficiency and Power Loss vs
Output Current
Efficiency vs Load Current Efficiency vs Input Voltage
Inductor Current at Light Load Soft Start-Up
Tracking Start-Up
Load Step (Burst Mode Operation)
Load Step (Forced Continuous
Mode)
Load Step (Pulse Skipping Mode)
OUTPUT CURRENT (A)
EFFICIENCY (%)
POWER LOSS (mW)
0.0001 0.01 1
38341 G01
0.000001
1
10
1000
100
0.1
10000
40
50
60
70
80
30
20
10
0
90
100
Burst Mode OPERATION
FORCED CONTINUOUS MODE
PULSE SKIPPING MODE
V
IN
= 12V
V
OUT
= 3.3V
FIGURE 10 CIRCUIT
OUTPUT CURRENT (A)
EFFICIENCY (%)
0.0001 0.01 1
38341 G02
0.000001
40
50
60
70
80
90
100
V
IN
= 12V
V
IN
= 5V
FIGURE 10 CIRCUIT
V
OUT
= 3.3V
INPUT VOLTAGE (V)
88
90
94
96
98
515
38341 G03
86
84
0
10 20 4025 30 35
82
80
92
EFFICIENCY (%)
V
OUT
= 3.3V
FIGURE 10 CIRCUIT
V
OUT
= 3.3V
FIGURE 10 CIRCUIT
V
OUT
100mV/DIV
AC
COUPLED
38341 G04
20μs/DIV
IL
2A/DIV
V
OUT
= 3.3V
FIGURE 10 CIRCUIT
V
OUT
100mV/DIV
AC
COUPLED
38341 G05
20μs/DIV
IL
2A/DIV
V
OUT
= 3.3V
FIGURE 10 CIRCUIT
V
OUT
100mV/DIV
AC
COUPLED
38341 G06
20μs/DIV
IL
2A/DIV
V
OUT
= 3.3V
I
LOAD
= 100μA
FIGURE 10 CIRCUIT
FORCED
CONTINUOUS
MODE
38341 G07
2μs/DIV
2A/DIV
Burst Mode
OPERATION
PULSE
SKIPPING
MODE
38341 G08
20ms/DIV
FIGURE 10 CIRCUIT
V
OUT
1V/DIV
38341 G09
20ms/DIV
FIGURE 10 CIRCUIT
MASTER
2V/DIV
V
OUT
2V/DIV