LTC3458L Linear Technology, LTC3458L Datasheet - Page 5

• Manufacturer Part Number: LTC3458L
• Description: 1.7A/ 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
• Manufacturer: Linear Technology

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