Datasheet

LTC3458L
5
3458lfa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SW
1V/DIV
I
L
100mA/DIV
SW
1V/DIV
SW
5V/DIV
I
L
200mA/DIV
V
OUT
100mV/DIV
I
L
200mA/DIV
SW
5V/DIV
V
OUT
100mV/DIV
I
L
200mA/DIV
SS
200mV/DIV
V
OUT
2V/DIV
2V/DIV
V
IN
I
L
200mA/DIV
SW
2V/DIV
I
L
0.5A/DIV
0mA
500ns/DIV
1μs/DIV
500ns/DIV
50μs/DIV
2ms/DIV2μs/DIV
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4μH
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4μH
V
IN
= 2.25V
V
OUT
= 5V
L = 7.4μH
R
ILIM
= 84.5k
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4μH
C
OUT
= 22μF
C
FF
= 22pF*
R
ILIM
= 84.5k
*C
FF
: FEED FORWARD CAPACITOR CONECTED BETWEEN V
OUT
AND FB.
GND
0mA
0mA
0mA
0mA
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4μH
C
OUT
= 22μF
C
FF
= 22pF
R
ILIM
= 84.5k
V
IN
= 3.3V
V
OUT
= 5V
L = 7.4μH
C
SS
= 0.1μF
3458L G14 3458L G15
3458L G16 3458L G17
3458L G18 3458L G19
Fixed Frequency (FF)
Discontinuous Current
Fixed Frequency (FF)
Continuous Current
Over-Current with 2A I
LIMIT
Burst Mode Operation
Burst Mode Operation Close-Up Soft-Start into 20Ω Load
(T
A
= 25°C unless otherwise specified)