Datasheet

LTC3555/LTC3555-X
10
3555fd
TYPICAL PERFORMANCE CHARACTERISTICS
Switching Regulators 1, 2
Pulse Skip Mode Efficiency
Switching Regulators 1, 2
Burst Mode Efficiency
Switching Regulators 1, 2
Forced Burst Mode Efficiency
Switching Regulator 3
Pulse Skip Mode Efficiency
Switching Regulator 3
Burst Mode Efficiency
Switching Regulator 3
Forced Burst Mode Efficiency
Switching Regulators 1, 2 Load
Regulation at V
OUT1,2
= 1.2V
Switching Regulators 1, 2 Load
Regulation at V
OUT1,2
= 1.8V
Switching Regulators 1, 2 Load
Regulation at V
OUT1,2
= 2.5V
LOAD CURRENT (mA)
1
40
EFFICIENCY (%)
50
60
70
80
10 100 1000
3555 G28
30
20
10
0
90
100
V
OUT1,2
= 2.5V
V
OUT1,2
= 1.2V
V
OUT1,2
= 1.8V
V
IN1,2
= 3.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3555 G29
0
1
V
OUT1,2
= 2.5V
V
OUT1,2
= 1.2V
V
OUT1,2
= 1.8V
V
IN1,2
= 3.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3555 G30
0
1
V
OUT1,2
= 2.5V
V
OUT1,2
= 1.2V
V
OUT1,2
= 1.8V
V
IN1,2
= 3.8V
LOAD CURRENT (mA)
1
40
EFFICIENCY (%)
50
60
70
80
10 100 1000
3555 G31
30
20
10
0
90
100
V
OUT3
= 2.5V
V
OUT3
= 1.2V
V
OUT3
= 1.8V
V
IN3
= 3.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3555 G32
0
1
V
OUT3
= 2.5V
V
OUT3
= 1.2V
V
OUT3
= 1.8V
V
IN3
= 3.8V
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3555 G33
0
1
V
OUT3
= 2.5V
V
OUT3
= 1.2V
V
OUT3
= 1.8V
V
IN3
= 3.8V
LOAD CURRENT (mA)
1.185
OUTPUT VOLTAGE (V)
1.200
1.215
1.230
0.1 10 100 1000
3555 G34
1.170
1
V
IN1,2
= 3.8V
Burst Mode
OPERATION
FORCED
Burst Mode
OPERATION
PULSE SKIP
MODE
LOAD CURRENT (mA)
1.778
OUTPUT VOLTAGE (V)
1.800
1.823
1.845
0.1 10 100 1000
3555 G35
1.755
1
V
IN1,2
= 3.8V
Burst Mode OPERATION
FORCED
Burst Mode
OPERATION
PULSE SKIP MODE
LOAD CURRENT (mA)
2.47
OUTPUT VOLTAGE (V)
2.50
2.53
2.56
0.1 10 100 1000
3555 G36
2.44
1
V
IN1,2
= 3.8V
Burst Mode OPERATION
FORCED
Burst Mode
OPERATION
PULSE SKIP MODE