LTC3443 Linear Technology, LTC3443 Datasheet - Page 4

• Manufacturer Part Number: LTC3443
• Description: High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter
• Manufacturer: Linear Technology

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