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Компоненты Описание
LTC3458L Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LTC3458L
1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
Linear Technology
LTC3458L Datasheet PDF : 16 Pages
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LTC3458L
TYPICAL PERFOR A CE CHARACTERISTICS
(T
A
= 25
°
C unless otherwise specified)
Fixed Frequency (FF)
Discontinuous Current
Fixed Frequency (FF)
Continuous Current
SW
1V/DIV
I
L
GND
100mA/DIV
0mA
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4
μ
H
500ns/DIV
3458L G14
Over-Current with 2A I
LIMIT
I
L
0.5A/DIV
SW
2V/DIV
V
IN
= 2.25V
V
OUT
= 5V
L = 7.4
μ
H
R
ILIM
= 84.5k
1
μ
s/DIV
0mA
3458L G16
Burst Mode Operation Close-Up
SW
1V/DIV
I
L
200mA/DIV
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4
μ
H
500ns/DIV
Burst Mode Operation
V
OUT
100mV/DIV
SW
5V/DIV
0mA
3458L G15
I
L
200mA/DIV
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4
μ
H
C
OUT
= 22
μ
F
C
FF
= 22pF
R
ILIM
= 84.5k
50
μ
s/DIV
Soft-Start into 20
Ω
Load
0mA
3458L G17
V
OUT
100mV/DIV
SW
5V/DIV
0mA
I
L
200mA/DIV
V
IN
= 3.3V
2
μ
s/DIV
3458L G18
V
OUT
= 5V
L = 7.4
μ
H
C
OUT
= 22
μ
F
C
FF
= 22pF*
R
ILIM
= 84.5k
*C
FF
: FEED FORWARD CAPACITOR CONECTED BETWEEN V
OUT
AND FB.
V
OUT
2V/DIV
V
IN
2V/DIV
SS
200mV/DIV
I
L
200mA/DIV
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4
μ
H
C
SS
= 0.1
μ
F
2ms/DIV
3458L G19
3458lfa
5
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