Datasheet

LTC4085
6
4085fd
Input R
ON
vs Temperature
Battery Current and Voltage
vs Time
Charge Current vs Temperature
(Thermal Regulation)
Charging from USB, I
BAT
vs V
BAT
Charging from USB, Low Power,
I
BAT
vs V
BAT
Ideal Diode Current vs Forward
Voltage and Temperature
(No External Device)
Ideal Diode Resistance and
Current vs Forward Voltage
(No External Device)
Ideal Diode Current vs Forward
Voltage and Temperature with
External Device
Ideal Diode Resistance and
Current vs Forward Voltage with
External Device
T
A
= 25°C unless otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (°C)
–50
125
R
ON
(mΩ)
150
175
200
225
275
–25
02550
4085 G10
75 100
250
V
IN
= 4.5V
V
IN
= 5.5V
I
LOAD
= 400mA
V
IN
= 5V
TIME (MINUTES)
0
0
I
BAT
(mA)
100
200
300
400
500
600
0
V
BAT
AND V
CHRG
(V)
1
2
3
4
5
6
50 100 150 200
4085 G11
400mAhr CELL
V
IN
= 5V
R
PROG
= 100k
R
CLPROG
= 2.1k
C/10
CHRG
V
BAT
I
BAT
TERMINATION
TEMPERATURE (°C)
–50
I
BAT
(mA)
400
500
600
25 75
4085 G12
300
200
–25 0
50 100 125
100
0
V
IN
= 5V
V
BAT
= 3.5V
Q
JA
= 50°C/W
V
BAT
(V)
0
0
I
BAT
(mA)
100
300
400
500
1
2
2.5 4.5
4085 G13
200
0.5 1.5
3
3.5
4
600
V
IN
= 5V
V
OUT
= NO LOAD
R
PROG
= 100k
R
CLPROG
= 2k
HPWR = 5V
V
BAT
(V)
0
0
I
BAT
(mA)
20
60
80
100
1
2
2.5 4.5
4085 G14
40
0.5 1.5
3
3.5
4
120
V
IN
= 5V
V
OUT
= NO LOAD
R
PROG
= 100k
R
CLPROG
= 2k
HPWR = 0V
V
FWD
(mV)
0
0
I
OUT
(mA)
100
300
400
500
1000
700
50
100
4085 G15
200
800
900
600
150
200
V
BAT
= 3.7V
V
IN
= 0V
–50°C
0°C
50°C
100°C
V
FWD
(mV)
0
0
I
OUT
(mA), R
DIO
(mΩ)
100
300
400
500
1000
700
50
100
4085 G16
200
800
900
600
150
200
V
BAT
= 3.7V
V
IN
= 0V
R
DIO
I
OUT
0
3000
4000
5000
80
4085 G17
2000
1000
2500
3500
4500
1500
500
0
20
40
60
100
V
FWD
(mV)
I
OUT
(mA)
V
BAT
= 3.7V
V
IN
= 0V
Si2333 PFET
–50°C
0°C
50°C
100°C
0
3000
4000
5000
80
4085 G18
2000
1000
2500
3500
4500
1500
500
0
20
40
60
100
V
FWD
(mV)
I
OUT
(mA)
V
BAT
= 3.7V
V
IN
= 0V
Si2333 PFET