LTC4088 LINER [Linear Technology], LTC4088 Datasheet - Page 5

• Manufacturer Part Number: LTC4088
• Description: High Effi ciency Battery Charger/USB Power Manager
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
700
600
500
400
300
100
100
200
1.0
0.8
0.4
0.2
0.6
80
40
90
70
60
50
0
0
2.7
0.01
0
Ideal Diode V-I Characteristics
PowerPath Switching Regulator
Effi ciency vs Output Current
USB Limited Battery Charge
Current vs Battery Voltage
5x USB SETTING,
BATTERY CHARGER SET FOR 1A
V
BAT
= 3.8V
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
0.04
3.0
FORWARD VOLTAGE (V)
BATTERY VOLTAGE (V)
1x MODE
OUTPUT CURRENT (A)
V
R
R
BUS
PROG
CLPROG
0.08
3.3
= 5V
= 1k
0.1
= 2.94k
0.12
INTERNAL IDEAL
DIODE ONLY
3.6
5x, 10x MODE
W
0.16
V
V
3.9
BUS
BUS
4088 G04
4088 G07
= 0V
= 5V
4088 G01
U
0.20
4.2
1
0.05
0.25
0.20
0.15
0.10
150
125
100
75
50
25
90
88
84
82
80
86
0
0
2.7
2.7
2.7
Ideal Diode Resistance
vs Battery Voltage
USB Limited Battery Charge
Current vs Battery Voltage
Battery Charging Effi ciency vs
Battery Voltage with No External
Load (P
1x USB SETTING,
BATTERY CHARGER SET FOR 1A
R
R
I
OUT
CLPROG
PROG
INTERNAL IDEAL
= 0mA
5x CHARGING
3.0
3.0
3.0
= 1k
EFFICIENCY
BAT
= 2.94k
DIODE
INTERNAL IDEAL DIODE
BATTERY VOLTAGE (V)
BATTERY VOLTAGE (V)
WITH SUPPLEMENTAL
BATTERY VOLTAGE (V)
EXTERNAL VISHAY
V
R
R
/P
BUS
PROG
CLPROG
Si2333 PMOS
3.3
3.3
3.3
BUS
= 5V
1x CHARGING
EFFICIENCY
= 1k
)
= 2.94k
3.6
3.6
3.6
3.9
3.9
3.9
T
4088 G05
4088 G08
4088 G02
A
= 25°C unless otherwise noted.
4.2
4.2
4.2
4.50
4.25
3.75
3.50
3.25
4.00
25
20
10
15
50
40
20
10
30
5
0
0
2.7
0
1
Battery Drain Current
vs Battery Voltage
Output Voltage vs Output Current
(Battery Charger Disabled)
V
(Suspend)
I
I
OUT
OUT
BUS
V
V
BAT
BAT
= 0µA
= 0mA
Current vs V
200
3.0
= 3.4V
2
= 4V
OUTPUT CURRENT (mA)
BATTERY VOLTAGE (V)
(SUSPEND MODE)
V
BUS
400
3.3
3
V
BUS
VOLTAGE (V)
LTC4088
BUS
= 5V
600
3.6
4
Voltage
V
BUS
V
5x MODE
800
= 0V
3.9
BUS
5
= 5V
4088 G06
4088 G03
4088 G09
5
1000
4088f
4.2
6