Datasheet LTC3458 (Analog Devices) - 6

LTC3458
W U TYPICAL PERFOR A CE CHARACTERISTICS Sync Operation at 1.33MHz FF Mode 100-300mA Load Step
SW 5V/DIV VOUT 200mV/DIV SYNC 2V/DIV COMP 500mV/DIV IL 200mA/DIV IL 0.5A/DIV 0mA 0mA V 500ns/DIV V 200 IN = 3.3V μs/DIV IN = 3.3V VOUT = 7V VOUT = 5V ROSC = 200k RZ = 33K CC1 = 270pF CC2 = 10pF L = 10μH COUT = 22μF F = 1MHz
Burst Mode Operation 10mA to Auto Mode 10mA to 100mA Load 50mA Load Step Step
V V OUT OUT 200mV/DIV 200mV/DIV BURST 50mA BURST 500mV/DIV 1V/DIV 100mA LOAD 10mA LOAD 10mA I I L L 200mA/DIV 200mA/DIV V 200 IN = 3.3V μs/DIV V 500 IN = 3.3V μs/DIV VOUT = 5V VOUT = 5V L = 10μH L = 10μH COUT = 22μF CBURST = 0.015μF RBURST = 133k
10mA to 200mA Load Step Forced BURST to FF Mode Showing UV Trip Switch with 50mA Load
VOUT V 200mV/DIV OUT 200mV/DIV – 4% FIXED FREQUENCY BURST VIN = 3.3V VOUT = 5V V L = 10μH IN = 3.3V V RZ = 33k I OUT = 5V I L L L = 10μH CC1 = 270pF 200mA/DIV 500mA/DIV C CC2 = 10pF BURST = 0.015μF R C BURST = 133k OUT = 22μF 200μs/DIV 200μs/DIV 3458fa 6