Datasheet

LTC3530
4
3530fb
R
BURST
(kΩ)
125
0
LOAD CURRENT (mA)
10
30
40
50
225
90
3530 G04
20
175 325275 425375 500475
60
70
80
ENTER Burst Mode
OPERATION
LEAVE Burst Mode
OPERATION
TEMPERATURE (°C)
–45
MINIMUM START VOLTAGE (V)
1.78
1.80
1.82
75
3530 G05
1.76
1.74
–5 35
–25 95
15 55 115
1.72
1.70
1.84
TEMPERATURE (°C)
–55
CHANGE FROM 25°C
5%
4%
3%
2%
1%
0%
–1%
–2%
–3%
–4%
–5%
–15
25
45 125
3530 G06
–35 5
65
85
105
V
IN
= V
OUT
= 3.3V
TEMPERATURE (°C)
–45
1.05
FREQUENCY (MHz)
1.07
1.11
1.13
1.15
1.25
1.19
–5
35
55
3530 G07
1.09
1.21
1.23
1.17
–25 15
75
95
115
TEMPERATURE (°C)
–45
FEEDBACK VOLTAGE (V)
1.215
1.220
1.225
15 55 115
3530 G08
1.210
1.205
1.200
–25 –5
35
75 95
50ns/DIV
3530 G0
9
SW1
2V/DIV
SW2
2V/DIV
V
IN
= 2.9V
V
OUT
= 3.3V AT 500mA
50ns/DIV
3530 G10
SW1
2V/DIV
SW2
2V/DIV
V
IN
= 3.3V
V
OUT
= 3.3V AT 500mA
50ns/DIV
3530 G11
SW1
2V/DIV
SW2
2V/DIV
V
IN
= 4.2V
V
OUT
= 3.3V AT 500mA
1μs/DIV
3530 G12
V
OUT
= 3.3V
20mV/DIV
AC COUPLED
C
OUT
= 22μF, X5R CERAMIC
V
IN
= 4.2V
V
IN
= 3.3V
V
IN
= 2.7V
Automatic Burst Mode Threshold
vs R
BURST
Minimum Start Voltage
vs Temperature
Average Input Current Limit
vs Temperature
Frequency Change vs Temperature Feedback Voltage vs Temperature
Switch Pins Before Entering
Boost Mode
T
A
= 25°C, unless otherwise specifi ed.
Switch Pins in Buck-Boost Mode
Switch Pins Entering
Buck-Boost Mode
LTC3530 Output Ripple
500mA Load
TYPICAL PERFORMANCE CHARACTERISTICS