LTC3555 Linear Technology, LTC3555 Datasheet - Page 8

• 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
8
300
600
500
400
100
200
2.0
1.8
5.0
4.5
3.5
3.0
2.5
2.6
2.4
2.2
4.0
0
–40
–40
0
Output Voltage vs Load Current in
Suspend
Battery Charge Current vs
Temperature
Oscillator Frequency vs
Temperature
R
10x MODE
V
BAT = 3.3V
R
PROG
BUS
CLPROG
–20
= 5V
–15
= 2k
0.1
= 3k
0
LOAD CURRENT (mA)
TEMPERATURE (°C)
BAT = 2.7V
V
V
TEMPERATURE (°C)
V
BAT = 3V
BUS
BUS
BUS
20
THERMAL REGULATION
0.2
10
= 0V
= 0V
= 5V
40
0.3
35
60
80
BAT = 3.6V
V
BUS
0.4
60
100
= 0V
3555 G13
3555 G16
3555 G10
120
0.5
85
4.21
4.19
4.18
4.17
4.20
0.5
0.4
0.1
0.3
0.2
15
12
0
9
6
3
–40
–40
0
V
Suspend
Battery Charger Float Voltage vs
Temperature
V
Temperature
V
I
V
BAT = 3.3V
R
BUS
BUS
VOUT
BUS
BUS
CLPROG
= 5V
= 5V
= 0μA
Current vs Load Current in
Quiescent Current vs
–15
–15
0.1
= 3k
LOAD CURRENT (mA)
TEMPERATURE (°C)
TEMPERATURE (°C)
1x MODE
0.2
10
10
5x MODE
0.3
35
35
0.4
60
60
3555 G11
3555 G14
3555 G17
0.5
85
85
3.62
3.60
3.68
3.66
3.64
3.4
3.2
3.0
2.8
2.6
70
60
50
40
30
–40
–40
0
3.3V LDO Output Voltage vs Load
Current, V
Low-Battery (Instant-On) Output
Voltage vs Temperature
V
Suspend vs Temperature
BAT = 3.9V, 4.2V
BAT = 2.7V
I
5x MODE
I
BAT = 3V
VOUT
VOUT
BUS
BAT = 3.1V
BAT = 3.2V
= 100mA
–15
= 0μA
Quiescent Current in
–15
5
BAT = 3.3V
LOAD CURRENT (mA)
TEMPERATURE (°C)
TEMPERATURE (°C)
BUS
BAT = 3.4V
10
10
10
= 0V
35
15
35
BAT = 3.5V
BAT = 3.6V
20
60
60
3555 G15
3555 G12
3555 G18
3555f
85
25
85