Datasheet

LTC3577/LTC3577-1
11
3577fa
Input Current Limit
vs Temperature
Input R
ON
vs Temperature
Charge Current vs Temperature
(Thermal Regulation)
TEMPERATURE (°C)
–50
I
VBUS
(mA)
400
1000
1100
1200
0
50
75
3577 G04
200
100
800
600
300
900
0
700
500
–25
25
100
125
V
BUS
= 5V
R
CLPROG
= 2.1k
10x MODE
5x MODE
1x MODE
TEMPERATURE (°C)
–50
0
R
ON
(m)
100
140
160
180
300
240
0
50
75
3577 G05
120
260
280
220
–25
25
100
125
I
OUT
= 400mA
V
BUS
= 4.5V
V
BUS
= 5.5V
V
BUS
= 5V
TEMPERATURE (°C)
–50
I
BAT
(mA)
400
500
600
25 75
3577 G06
300
200
–25 0
50 100 125
100
0
V
BUS
= 5V
10x MODE
R
PROG
= 2k
TYPICAL PERFORMANCE CHARACTERISTICS
Battery Current and Voltage
vs Time LTC3577 I
BAT
vs V
BAT
LTC3577-1 I
BAT
vs V
BAT
Forward Voltage vs Ideal Diode
Current (No External FET)
Forward Voltage vs Ideal Diode
Current (with Si2333DS External FET)
T
A
= 25°C unless otherwise specifi ed
TIME (HOUR)
0
0
I
BAT
(mA)
V
BAT
AND V
CHRG
(V)
100
200
300
400
600
1
234
3577 G07
56
500
0
1
2
3
4
6
V
BAT
I
BAT
C/10
5
1450mAhr
CELL
V
BUS
= 5V
R
PROG
= 2k
R
CLPROG
= 2k
CHRG
SAFETY
TIMER
TERMINATION
V
BAT
(V)
2.0
I
BAT
(mA)
0
100
200
600
400
2.4
2.8
3.2 3.6
3577 G09
500
300
4.0
4.4
R
CLPROG
= 2.1k
R
PROG
= 2k
V
BUS
= 5V
10x MODE
FALLING V
BAT
RISING V
BAT
V
BAT
(V)
2.0
0
I
BAT
(mA)
100
200
300
400
600
2.4
2.8 3.2 3.6
3577 G10
4.0 4.4
FALLING V
BAT
500
RISING V
BAT
R
CLPROG
= 2.1k
R
PROG
= 2k
V
BUS
= 5V
10x MODE
I
BAT
(A)
0
0
V
FWD
(V)
0.05
0.10
0.15
0.20
0.25
0.2
0.4 0.6 0.8
3577 G11
1.0 1.2
V
BAT
= 3.2V
V
BUS
= 0V
T
A
= 25°C
V
BAT
= 4.2V
V
BAT
= 3.6V
I
BAT
(A)
0
V
FWD
(mV)
15
20
25
0.6
1.0
3577 G12
10
5
0
0.2 0.4 0.8
30
35
40
V
BAT
= 3.8V
V
BUS
= 0V
T
A
= 25°C
Battery Regulation (Float) Voltage
vs Temperature
TEMPERATURE (°C)
–50
V
BAT
(V)
4.22
25
3577 G08
4.12
4.14
4.08
–25 0 50
4.06
4.04
4.24
4.20
4.18
4.16
4.10
75 100 125
LTC3577
I
BAT
= 2mA
LTC3577-1