LTC3550-1 Linear Technology, LTC3550-1 Datasheet - Page 6

• Manufacturer Part Number: LTC3550-1
• Description: Dual Input USB/AC Adapter Li-Ion Battery Charger
• Manufacturer: Linear Technology

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LTC3550-1
TYPICAL PERFOR A CE CHARACTERISTICS
6
1000
550
500
450
400
350
300
250
800
600
400
200
50
45
40
35
30
25
20
15
10
5
0
–50
–50
0
–50
DCIN Power FET On-Resistance
vs Temperature
Charge Current
vs Ambient Temperature
DCIN Shutdown Current
vs Temperature
V
I
BAT
V
V
V
θ
BAT
V
V
DCIN
BAT
JA
DCIN
–25
DCIN
DCIN
–25
–25
= 200mA
= 40°C/W
= 4V
= 4V
= V
= 4.3V
R
= 8V
= 5V
IDC
R
USBIN
0
IDC
0
TEMPERATURE (°C)
TEMPERATURE (°C)
THERMAL REGULATION
TEMPERATURE (°C)
= R
0
= 1.25k
IUSB
= 5V
25
25
25
= 2k
50
50
ONSET OF
50
75
75
ENABLE = 5V
W
75
100
100
3550-1 G13
3550-1 G16
3550-1 G10
U
125
100
125
900
800
700
600
500
400
300
800
750
700
650
600
550
500
450
400
350
45
40
35
30
25
20
15
10
5
0
–50
–50
4.0
Charge Current
vs Supply Voltage
USBIN Power On-Resistance
vs Temperature
USBIN Shutdown Current
vs Temperature
R
V
θ
V
I
V
BAT
JA
V
V
IDC
BAT
BAT
USBIN
USBIN
USBIN
4.5
–25
= 35°C/W
–25
= 200mA
= 1.25k
= 4V
= 4V
= 4.3V
5.0
= 8V
= 5V
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
5.5
V
25
THERMAL REGULATION
DCIN
6.0
25
(V)
50
6.5
50
75
ENABLE = 0V
ONSET OF
7.0
75
100
7.5
3550-1 G14
3550-1 G17
3550-1 G11
T
A
125
100
8.0
= 25°C, unless otherwise noted.
1000
800
600
400
200
900
850
800
750
700
650
600
2.8
2.6
2.4
2.2
2.0
1.8
1.6
0
–50
–50
2.4
Charge Current vs Battery Voltage
ENABLE Pin Threshold Voltage
(On-to-Off) vs Temperature
ENABLE Pin Pulldown Resistance
vs Temperature
V
DCIN
2.7
–25
–25
= V
USBIN
3.0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
= 5V
V
θ
R
3.3
DCIN
JA
V
IDC
BAT
= 40°C/W
25
25
= 1.25k
= V
(V)
3.6
USBIN
50
50
3.9
= 5V
75
75
4.2
3550-1 G15
3550-1 G18
3550-1 G12
35501f
4.5
100
100