LTC3443 Datasheet, PDF (4/16 Pages) Linear Technology – High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

LTC3443
TYPICAL PERFOR A CE CHARACTERISTICS (T_A = 25°C unless otherwise specified)
Switch Pins in Buck-Boost Mode
Switch Pins Entering
Buck-Boost Mode
SW1
2V/DIV
SW1
2V/DIV
SW2
2V/DIV
V_IN = 3.3V
V_OUT = 3.3V
I_OUT = 500mA
50ns/DIV
Switch Pins Before Entering
Boost Mode
SW1
2V/DIV
SW2
2V/DIV
V_IN = 3V
V_OUT = 3.3V
I_OUT = 500mA
50ns/DIV
3443 G06
Burst Mode Quiescent Current
50
V_IN = V_OUT = 3.6V
40
30
20
3443 G04
SW2
2V/DIV
V_IN = 4.2V
V_OUT = 3.3V
I_OUT = 500mA
50ns/DIV
3443 G05
Active Quiescent Current
630
620 ^{VIN = VOUT = 3.6V}
610
600
590
580
570
560
550
540
530
520
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
3443 G07
Feedback Voltage Line Regulation
90
V_IN = V_OUT = 2.4V TO 5.5V
Feedback Voltage
1.241
V_IN = V_OUT = 3.6V
1.236
1.231
1.226
1.221
1.216
1.211
1.206
1.201
1.196
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
3443 G08
Error Amp Source Current
20
V_IN = V_OUT = 3.6V
80
15
70
10
10
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3443 G09
60
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
3443 G10
5
–55 –25 5 35 65 95 125
TEMPERATURE (°C)
3443 G11
4
sn3443 3443fs