Datasheet

LTC3835
5
3835fd
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency and Power Loss
vs Output Current Efficiency vs Load Current Efficiency vs Input Voltage
Load Step
(Burst Mode Operation)
Load Step
(Forced Continuous Mode)
Load Step
(Pulse-Skipping Mode)
Inductor Current at Light Load Soft Start-Up Tracking Start-Up
LOAD CURRENT (mA)
EFFICIENCY (%)
POWER LOSS (mW)
0.01 0.1 1 10 100 1000 10000
3835 G01
0.001
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
LOAD CURRENT (mA)
EFFICIENCY (%)
0.01 0.1 1 10 100 1000 10000
3835 G02
0.001
50
60
70
80
40
90
100
V
IN
= 12V
V
IN
= 5V
V
OUT
= 3.3V
INPUT VOLTAGE (V)
EFFICIENCY (%)
5 10 15 20 30 40
3835 G03
0
25 35
86
88
90
92
94
84
82
96
98
V
OUT
= 3.3V
20µs/DIV
V
OUT
100mV/
DIV AC
COUPLED
I
L
2A/DIV
3835 G04
20µs/DIV
V
OUT
100mV/DIV
AC
COUPLED
I
L
2A/DIV
3835 G05
20µs/DIV
V
OUT
100mV/DIV
AC
COUPLED
I
L
2A/DIV
3835 G06
4µs/DIV
FORCED
CONTIN-
UOUS
MODE
2A/DIV
BURST
MODE
PULSE-
SKIPPING
MODE
3835 G07
20ms/DIV
3835 G08
V
OUT
1V/DIV
20ms/DIV
3835 G09
V
OUT2
2V/DIV (MASTER)
V
OUT1
2V/DIV
(SLAVE)
FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
FIGURE 11 CIRCUIT
V
OUT
= 3.3V
FIGURE 11 CIRCUIT
V
OUT
= 3.3V
I
LOAD
= 300µA
FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
FIGURE 11 CIRCUIT
V
OUT
= 3.3V
FIGURE 11 CIRCUIT
V
OUT
= 3.3V
T
A
= 25ºC, unless otherwise noted.