LTC3555 Linear Technology, LTC3555 Datasheet - Page 10

• Manufacturer Part Number: LTC3555
• Description: High Efficiency USB Power Manager + Triple Step-Down DC/DC
• Manufacturer: Linear Technology

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