Datasheet

LTC3556
7
3556f
TYPICAL PERFORMANCE CHARACTERISTICS
Ideal Diode V-I Characteristics
Ideal Diode Resistance
vs Battery Voltage
Output Voltage vs Load Current
(Battery Charger Disabled)
USB Limited Battery Charge
Current vs Battery Voltage
USB Limited Battery Charge
Current vs Battery Voltage
Battery Drain Current
vs Battery Voltage
PowerPath Switching Regulator
Effi ciency vs Load Current
Battery Charging Effi ciency vs
Battery Voltage with No External
Load (P
BAT
/P
BUS
)
V
BUS
Current vs V
BUS
Voltage
(Suspend)
FORWARD VOLTAGE (V)
0
CURRENT (A)
0.6
0.8
1.0
0.16
3556 G01
0.4
0.2
0
0.04
0.08
0.12
0.20
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
INTERNAL IDEAL
DIODE ONLY
V
BUS
= 0V
V
BUS
= 5V
BATTERY VOLTAGE (V)
2.7
RESISTANCE ()
0.15
0.20
0.25
3.9
3556 G02
0.10
0.05
0
3.0
3.3
3.6
4.2
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
INTERNAL IDEAL
DIODE
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
4.00
4.25
4.50
800
3556 G03
3.75
3.50
3.25
200
400
600
1000
BAT = 4V
BAT = 3.4V
V
BUS
= 5V
5x MODE
BATTERY VOLTAGE (V)
2.7
500
600
700
3.9
3556 G04
400
300
3.0 3.3 3.6 4.2
200
100
0
CHARGE CURRENT (mA)
V
BUS
= 5V
R
PROG
= 1k
R
CLPROG
= 3.01k
5x USB SETTING,
BATTERY CHARGER SET FOR 1A
BATTERY VOLTAGE (V)
2.7
0
CHARGE CURRENT (mA)
25
50
75
100
125
150
3.0 3.3 3.6 3.9
3556 G05
4.2
V
BUS
= 5V
R
PROG
= 1k
R
CLPROG
= 3.01k
1x USB SETTING,
BATTERY CHARGER SET FOR 1A
BATTERY VOLTAGE (V)
2.7
BATTERY CURRENT (µA)
15
20
25
3.9
3556 G06
10
5
0
3.0
3.3
3.6
4.2
V
BUS
= 0V
V
BUS
= 5V
(SUSPEND MODE)
I
VOUT
= 0µA
LOAD CURRENT (A)
0.01
40
EFFICIENCY (%)
50
60
70
80
100
0.1 1
3556 G07
90
5x, 10x MODE
1x MODE
BAT = 3.8V
BATTERY VOLTAGE (V)
2.7
EFFICIENCY (%)
90
100
3.9
3556 G08
80
70
60
3.0
3.3
3.6
4.2
R
CLPROG
= 3.01k
R
PROG
= 1k
I
VOUT
= 0mA
5x CHARGING
EFFICIENCY
1x CHARGING
EFFICIENCY
BUS VOLTAGE (V)
0
QUIESCENT CURRENT (µA)
30
40
50
4
3556 G09
20
10
0
1
2
3
5
BAT = 3.8V
I
VOUT
= 0mA