Datasheet

LTC3455/LTC3455-1
6
3455fc
TYPICAL PERFORMANCE CHARACTERISTICS
Charge Current When
Wall-Powered
Charge Current When
USB-Powered
Battery Current When
USB- or Wall-Powered
PROG Pin Voltage
vs Charge Current
R
DS(ON)
for Switching Regulator
Power Switches
R
DS(ON)
for V
MAX
, USB, and HSO
PMOS Switches
Battery Charger Regulation
Voltage
Battery Charger Recharge
Threshold
Battery Charger Trickle-Charge
Threshold
TEMPERATURE (°C)
–50
V
BAT
(V)
4.30
4.25
4.20
4.15
4.10
4.05
4.00
25 75
3455 G13
–25 0
50 100 125
LTC3455-1
LTC3455
TEMPERATURE (°C)
–50
V
RECHARGE
(V)
4.20
4.15
4.10
4.05
4.00
3.90
3.95
25 75
3455 G14
–25 0
50 100 125
LTC3455-1
LTC3455
TEMPERATURE (°C)
–50
TRICKLE CHARGE THRESHOLD (V)
3.0
2.9
2.8
2.7
2.6
2.5
25 75
3455 G15
–25 0
50 100 125
FALLING
RISING
TEMPERATURE (°C)
–50
BATTERY CHARGE CURRENT (mA)
600
500
400
300
200
100
0
25 75
3455 G16
–25 0
50 100 125
V
BAT
= 3.6V
V
MAX
= 4.5V
R
PROG
= 2.49k
THERMAL CONTROL
LOOP IN OPERATION
TEMPERATURE (°C)
–50
BATTERY CHARGE CURRENT (mA)
600
500
400
300
200
100
0
25 75
3455 G17
–25 0
50 100 125
V
BAT
= 3.6V
V
USB
= 5V
R
PROG
= 2.49k
V
USBHP
= 2V
V
USBHP
= 0V
THERMAL CONTROL
LOOP IN OPERATION
TEMPERATURE (°C)
–50
BATTERY CURRENT (μA)
15.0
10.0
5.0
12.5
7.5
2.5
0
25 75
3455 G18
–25 0
50 100 125
V
BAT
= 4.2V
CHARGER OFF
CHARGE CURRENT (mA)
0
V
PROG
(V)
1.50
1.25
1.00
0.75
0.50
0.25
0
300
3455 G19
100 200
400 500
V
BAT
= 3.6V
V
MAX
= 4.5V
R
PROG
= 2.49
T
A
= 25°C
TEMPERATURE (°C)
–50
R
DS(ON)
0.7
0.6
0.5
0.4
0.3
0.1
0.2
0
25 75
3455 G20
–25 0
50 100 125
NMOS
PMOS
V
BAT
= 3.6V
TEMPERATURE (°C)
–50
R
DS(ON)
1.4
1.2
1.0
0.8
0.6
0.2
0.4
0
25 75
3455 G21
–25 0
50 100 125
HSO
USB
V
MAX
V
HSI
= 3.3V
V
USB
= 5V
V
BAT
= 3.6V