LTC4055 Linear Technology, LTC4055 Datasheet - Page 6

• Manufacturer Part Number: LTC4055
• Description: USB Power Controller and Li-Ion Linear Charger
• Manufacturer: Linear Technology

LTC4055
TYPICAL PERFOR A CE CHARACTERISTICS
6
1000
400
300
200
900
800
700
600
500
400
300
200
100
600
500
100
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0
–50
0
0
Charging from USB, I
Charge Current vs Temperature
(Thermal Regulation)
Ideal Diode and Schottky Diode
Forward Voltage vs Current
V
V
V
V
R
R
HPWR = 1
V
V
IN
BAT
JA
BAT
IN
IN
OUT
PROG
CLPROG
0.5
50
–25
= 5V
= 0V
= 5V
= 37 C/W
= 3.5V
= 3.5V
= NO LOAD
= 100k
100
1
= 100k
0
TEMPERATURE ( C)
150
1.5
R
R
PROG
V
PROG
25
200 250
V
FWD
2
BAT
= 100k
(mV)
= 50k
2.5
(V)
50
BAT
300 350 400
3
SCHOTTKY
75
vs V
3.5
W
100
BAT
4055 G13
4055 G19
4
4055 G16
U
125
450
4.5
0.5A/DIV
0.5A/DIV
5V/DIV
5V/DIV
V
1000
I
OUT
100
900
800
700
600
500
400
300
200
100
V
BAT
80
40
I
60
20
IN
IN
0
0
0
0
Input Connect Waveforms
V
I
Ideal Diode Forward Voltage vs
Current and Temperature
Charging from USB, Low Power,
I
OUT
BAT
V
V
R
R
HPWR = 0
V
V
BAT
IN
OUT
PROG
CLPROG
BAT
IN
20
0.5
= 100mA
= 5V
= 0V
= 3.5V
vs V
= 3.5V
= NO LOAD
40
= 100k
1
= 100k
BAT
60
1.5
80
V
–50 C
V
FWD
1ms/DIV
2
BAT
100
0 C
(mV)
2.5
(V)
25 C
120 140
3
3.5
160
75 C
125 C
180
4055 G14
4
4055 G17
4055 G20
200
4.5
0.5A/DIV
0.5A/DIV
5V/DIV
5V/DIV
V
1000
I
OUT
900
800
700
600
500
400
300
200
100
BAT
V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
I
IN
IN
4.260
0
0
0
Input Disconnect Waveforms
Undervoltage Current Limit,
Charging from V
Ideal Diode Forward Voltage and
Resistance vs Current
V
I
OUT
V
V
BAT
BAT
IN
20
= 100mA
= 0V
= 3.5V
= 3.5V
4.300
40
60
R
PROG
80
4.340
V
1ms/DIV
FWD
V
R
IN
100
FWD
IN
R
= 50k
(V)
(mV)
, I
PROG
120 140
BAT
4.380
= 34k
R
R
PROG
vs V
PROG
HPWR = 0
R
160
DIO(ON)
= 100
IN
4.420
= 100k
180
4055 G15
4055 G18
4055 G22
4055p
200