LTC3458L Datasheet, PDF (6/16 Pages) Linear Technology – 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3458L
TYPICAL PERFOR A CE CHARACTERISTICS ^(TA ^{= 25°C unless otherwise specified)}
Sync Operation at 1.33MHz
FF Mode 100-300mA Load Step
SW
5V/DIV
SYNC
2V/DIV
I_L
200mA/DIV
V_IN = 3.3V
V_OUT = 5V
R_T = 200k
500ns/DIV
0mA
3458L G20
Burst Mode Operation 10mA to
50mA Load Step
V_OUT
200mV/DIV
BURST
500mV/DIV
LOAD
50mA
10mA
V_OUT
200mV/DIV
COMP
500mV/DIV
I_L
0.5A/DIV
0mA
V_IN = 3.3V
V_OUT = 5V
R_Z = 33K
CC1 = 270pF
CC2 = 10pF
C_OUT = 22µF
200µs/DIV
L = 10µH
F = 1MHz
3458L G21
Auto Mode 10mA to 100mA Load
Step
V_OUT
200mV/DIV
BURST
1V/DIV
LOAD
100mA
10mA
I_L
200mA/DIV
I_L
200mA/DIV
V_IN = 3.3V
V_OUT = 5V
L = 10µH
C_OUT = 22µF
R_ILIM = 110k
200µs/DIV
3458L G22
10mA to 200mA Load Step
Showing UV Trip
V_IN = 3.3V
500µs/DIV
V_OUT = 5V
L = 10µH
C_BURST = 0.015µF
R_BURST = 133k
R_ILIM = 110k
Forced BURST to FF Mode
Switch with 50mA Load
3458L G23
V_OUT
200mV/DIV
I_L
200mA/DIV
6
– 4%
200µs/DIV
V_IN = 3.3V
V_OUT = 5V
L = 10µH
C_BURST = 0.015µF
R_BURST = 133k
3458L G24 ^RILIM ^{= 110k}
V_OUT
200mV/DIV
FIXED
FREQUENCY
BURST
I_L
500mA/DIV
200µs/DIV
V_IN = 3.3V
V_OUT = 5V
L = 10µH
R_Z = 33k
CC1 = 270pF
CC2 = 10pF
C_OUT = 22µF
3458L G25 ^{RILIM = 110k}
3458lf