LTC3530 LINER [Linear Technology], LTC3530 Datasheet - Page 4

• Manufacturer Part Number: LTC3530
• Description: Wide Input Voltage Synchronous Buck-Boost DC/DC Converter
• Manufacturer: LINER [Linear Technology]

LTC3530
TYPICAL PERFORMANCE CHARACTERISTICS
4
2V/DIV
2V/DIV
1.17
SW1
SW2
1.25
1.23
1.21
1.19
1.15
1.13
1.11
1.09
1.07
1.05
50
40
20
90
80
70
60
30
10
0
–45
125
Switch Pins in Buck-Boost Mode
Automatic Burst Mode Threshold
vs R
Frequency Change vs Temperature
V
V
IN
OUT
–25
= 3.3V
175
BURST
= 3.3V AT 500mA
LEAVE Burst Mode
OPERATION
ENTER Burst Mode
OPERATION
–5
225
TEMPERATURE (°C)
15
275
R
BURST
50ns/DIV
35
325
(kΩ)
55
375
75
425
95 115
475
3530 G04
3530 G07
3530 G10
500
2V/DIV
2V/DIV
1.225
1.220
1.215
1.210
1.205
1.200
SW1
SW2
1.70
1.84
1.82
1.78
1.76
1.74
1.72
1.80
–45
–45
Switch Pins Entering
Buck-Boost Mode
Minimum Start Voltage
vs Temperature
Feedback Voltage vs Temperature
V
V
IN
OUT
–25
–25 –5
= 4.2V
= 3.3V AT 500mA
–5
TEMPERATURE (°C)
TEMPERATURE (°C)
15
15
50ns/DIV
35
35
55
55
75
75
95
95
3530 G05
3530 G08
3530 G11
115
T
115
A
= 25°C, unless otherwise specifi ed.
V
V
V
IN
IN
IN
2V/DIV
2V/DIV
= 2.7V
= 3.3V
= 4.2V
SW1
SW2
–1%
–2%
–3%
–4%
–5%
5%
4%
3%
2%
1%
0%
–55
Average Input Current Limit
vs Temperature
Switch Pins Before Entering
Boost Mode
V
V
V
20mV/DIV
AC COUPLED
C
LTC3530 Output Ripple
500mA Load
V
IN
OUT
OUT
OUT
IN
–35
= 2.9V
= V
= 3.3V AT 500mA
= 3.3V
= 22μF, X5R CERAMIC
OUT
–15
= 3.3V
TEMPERATURE (°C)
5
50ns/DIV
1μs/DIV
25
45
65
85 105
3530 G06
3530 G12
3530 G09
3530fb
125