LTC3550 Linear Technology, LTC3550 Datasheet - Page 9

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

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TYPICAL PERFOR A CE CHARACTERISTICS
AC COUPLED
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
100mV/DIV
200mA/DIV
5V/DIV
I
V
V
LOAD
OUT
OUT
SW
I
I
L
L
Load Step
Burst Mode Operation
V
V
I
V
V
I
LOAD
LOAD
CC
OUT
CC
OUT
= 3.6V
= 3.6V
= 1.8V
= 1.8V
= 50mA TO 600mA
= 50mA
300
250
200
150
100
50
0
–50
Switch Leakage Current
vs Temperature
V
RUN = 0V
CC
–25
20µs/DIV
= 5.5V
4µs/DIV
SYNCHRONOUS SWITCH
0
TEMPERATURE (°C)
W
25
MAIN SWITCH
U
50
3550 G40
3550 G37
75
AC COUPLED
500mA/DIV
100mV/DIV
500mA/DIV
500mA/DIV
100
2V/DIV
1V/DIV
I
V
LOAD
3550 G35
I
RUN
V
LOAD
OUT
OUT
125
I
L
V
V
I
Start-Up from Shutdown
Load Step
LOAD
V
V
I
CC
OUT
LOAD
CC
OUT
= 3.6V
= 3.6V
= 1.8V
= 600mA
= 1.8V
= 100mA TO 600mA
40µs/DIV
20µs/DIV
120
100
80
60
40
20
0
Switch Leakage Current vs V
0
T
RUN = 0V
A
3550 G38
3550 G41
= 25°C, unless otherwise noted.
1
AC COUPLED
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
100mV/DIV
500mA/DIV
500mA/DIV
SYNCHRONOUS
2
I
I
V
LOAD
V
LOAD
OUT
V
OUT
CC
I
SWITCH
I
L
L
3
(V)
Load Step
V
V
I
Load Step
V
V
I
LOAD
LOAD
SWITCH
CC
OUT
CC
OUT
MAIN
= 3.6V
= 3.6V
= 1.8V
4
= 1.8V
= 0mA TO 600mA
= 200mA TO 600mA
5
CC
3550 G36
20µs/DIV
20µs/DIV
LTC3550
6
3550fa
9
3550 G39
3550 G42