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LTC3538 Просмотр технического описания (PDF) - Linear Technology
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LTC3538
800mA Synchronous Buck-Boost DC/DC Converter
Linear Technology
LTC3538 Datasheet PDF : 16 Pages
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LTC3538
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise noted
V
C
On/Off Threshold vs
Temperature
0.80
0.75
0.70
0.65
V
C
ON THRESHOLD
0.60
0.55
V
C
OFF THRESHOLD
0.50
0.45
0.40
–50
0
50
TEMPERATURE
(°C)
100
3538 G10
Current Limit vs Temperature
4.0
V
IN
= V
OUT
= 3.6V
3.5
PEAK CURRENT LIMIT
Load Transient in Fixed
Frequency Mode
V
OUT
100mV/DIV
3.0
I
LOAD
200mA/DIV
2.5
2.0
LINEAR CURRENT LIMIT
1.5
–50 –25 0
25 50
TEMPERATURE
(°C)
75 100
3538 G12
100μs/DIV
V
IN
= 3.3V
V
OUT
= 3.3V
I
LOAD
= 0mA TO 500mA
C
OUT
= 22μF X5R CERAMIC
3538 G13
Burst Mode Operation
Transition From Burst Mode
Operation to Fixed Frequency
V
OUT
50mV/DIV
I
L
500mA/DIV
10μs/DIV
V
IN
= 3.3V
V
OUT
= 3.3V
I
LOAD
= 10mA
C
OUT
= 22μF X5R CERAMIC
3538 G14
BURST
2V/DIV
V
OUT
100mV/DIV
50μs/DIV
V
IN
= 3.3V
V
OUT
= 3.3V
I
LOAD
= 30mA
C
OUT
= 22μF X5R CERAMIC
3538 G15
3538fb
5
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