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| LTC3550_15 Datasheet, PDF (9/24 Pages) Linear Technology – Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter | |||
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LTC3550
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Switch Leakage Current
vs Temperature
300
VCC = 5.5V
RUN = 0V
250
200
Switch Leakage Current vs VCC
120
RUN = 0V
100
SYNCHRONOUS
SWITCH
80
150
100
MAIN SWITCH
50
SYNCHRONOUS SWITCH
0
â50 â25
0 25 50 75 100 125
TEMPERATURE (°C)
3550 G35
60
MAIN
SWITCH
40
20
0
0
1
2
3
4
VCC (V)
56
3550 G36
Burst Mode Operation
Start-Up from Shutdown
Load Step
SW
5V/DIV
VOUT
100mV/DIV
AC COUPLED
IL
200mA/DIV
VCC = 3.6V
VOUT = 1.8V
ILOAD = 50mA
4µs/DIV
RUN
2V/DIV
VOUT
1V/DIV
ILOAD
500mA/DIV
3550 G37
VCC = 3.6V
VOUT = 1.8V
ILOAD = 600mA
40µs/DIV
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
3550 G38
VCC = 3.6V
20µs/DIV
VOUT = 1.8V
ILOAD = 0mA TO 600mA
3550 G39
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
VCC = 3.6V
20µs/DIV
VOUT = 1.8V
ILOAD = 50mA TO 600mA
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
3550 G40
VCC = 3.6V
20µs/DIV
VOUT = 1.8V
ILOAD = 100mA TO 600mA
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
3550 G41
VCC = 3.6V
20µs/DIV
VOUT = 1.8V
ILOAD = 200mA TO 600mA
3550 G42
3550fa
9
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