Datasheet

LTC4088
5
4088fb
Typical perForMance characTerisTics
T
A
= 25°C, unless otherwise noted.
PowerPath Switching Regulator
Efficiency vs Output Current
Battery Charging Efficiency vs
Battery Voltage with No External
Load (P
BAT
/P
BUS
)
V
BUS
Current vs V
BUS
Voltage
(Suspend)
Ideal Diode V-I Characteristics
Ideal Diode Resistance
vs Battery Voltage
Output Voltage vs Output Current
(Battery Charger Disabled)
USB Limited Battery Charge
Current vs Battery Voltage
Battery Drain Current
vs Battery Voltage
USB Limited Battery Charge
Current vs Battery Voltage
FORWARD VOLTAGE (V)
0
CURRENT (A)
0.6
0.8
1.0
0.16
4088 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 (Ω)
0.15
0.20
0.25
3.9
4088 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
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
4.00
4.25
4.50
800
4088 G03
3.75
3.50
3.25
200
400
600
1000
V
BAT
= 4V
V
BAT
= 3.4V
V
BUS
= 5V
5x MODE
BATTERY VOLTAGE (V)
2.7
500
600
700
3.9
4088 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
= 2.94k
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
4088 G05
4.2
V
BUS
= 5V
R
PROG
= 1k
R
CLPROG
= 2.94k
1x USB SETTING,
BATTERY CHARGER SET FOR 1A
BATTERY VOLTAGE (V)
2.7
BATTERY CURRENT (µA)
15
20
25
3.9
4088 G06
10
5
0
3.0
3.3
3.6
4.2
V
BUS
= 0V
V
BUS
= 5V
(SUSPEND MODE)
I
OUT
= 0µA
OUTPUT CURRENT (A)
0.01
40
EFFICIENCY (%)
50
60
70
80
100
0.1 1
4088 G07
90
5x, 10x MODE
1x MODE
V
BAT
= 3.8V
V
BUS
VOLTAGE (V)
1
V
BUS
CURRENT (µA)
30
40
50
5
4088 G09
20
10
0
2
3
4
6
I
OUT
= 0mA
BATTERY VOLTAGE (V)
2.7
EFFICIENCY (%)
86
88
90
3.9
4088 G08
84
82
80
3.0
3.3
3.6
4.2
R
CLPROG
= 2.94k
R
PROG
= 1k
I
OUT
= 0mA
5x CHARGING
EFFICIENCY
1x CHARGING
EFFICIENCY