Datasheet
LTC3556
8
3556f
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs Load Current
in Suspend
V
BUS
Current vs Load Current
in Suspend
3.3V LDO Output Voltage
vs Load Current, V
BUS
= 0V
Battery Charge Current
vs Temperature
Battery Charger Float Voltage
vs Temperature
Low-Battery (Instant On) Output
Voltage vs Temperature
Oscillator Frequency
vs Temperature
V
BUS
Quiescent Current
vs Temperature
V
BUS
Quiescent Current in
Suspend vs Temperature
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
4.0
4.5
5.0
0.4
3556 G10
3.5
3.0
2.5
0.1
0.2
0.3
0.5
V
BUS
= 5V
BAT = 3.3V
R
CLPROG
= 3k
LOAD CURRENT (mA)
0
V
BUS
CURRENT (mA)
0.3
0.4
0.5
0.4
3556 G11
0.2
0.1
0
0.1
0.2
0.3
0.5
V
BUS
= 5V
BAT = 3.3V
R
CLPROG
= 3.01k
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
3.0
3.2
20
3556 G12
2.8
2.6
5
10
15
25
3.4
BAT = 3V
BAT = 3.1V
BAT = 3.2V
BAT = 3.3V
BAT = 3.6V
BAT = 3.5V
BAT = 3.4V
BAT = 3.9V, 4.2V
TEMPERATURE (°C)
–40
0
CHARGE CURRENT (mA)
100
200
300
400
040
80
120
3556 G13
500
600
–20 20
60
100
THERMAL REGULATION
R
PROG
= 2k
10x MODE
TEMPERATURE (°C)
–40
FLOAT VOLTAGE (V)
4.19
4.20
60
3556 G14
4.18
4.17
–15
10
35
85
4.21
TEMPERATURE (°C)
–40
OUTPUT VOLTAGE (V)
3.64
3.66
60
3556 G15
3.62
3.60
–15
10
35
85
3.68
BAT = 2.7V
I
VOUT
= 100mA
5x MODE
TEMPERATURE (°C)
–40
FREQUENCY (MHz)
2.2
2.4
60
3556 G16
2.0
1.8
–15
10
35
85
2.6
V
BUS
= 5V
BAT = 3.6V
V
BUS
= 0V
BAT = 3V
V
BUS
= 0V
BAT = 2.7V
V
BUS
= 0V
TEMPERATURE (°C)
–40
QUIESCENT CURRENT (mA)
9
12
60
3556 G17
6
3
–15
10
35
85
15
V
BUS
= 5V
I
VOUT
= 0µA
5x MODE
1x MODE
TEMPERATURE (°C)
–40
QUIESCENT CURRENT (µA)
50
60
60
3556 G18
40
30
–15
10
35
85
70
I
VOUT
= 0µA