Datasheet LTC3458L (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| 页数 / 页 | 16 / 6 — TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C unless otherwise … |
| 文件格式/大小 | PDF / 385 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C unless otherwise specified). Sync Operation at 1.33MHz
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LTC3458L
W U 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 VOUT 200mV/DIV SYNC 2V/DIV COMP 500mV/DIV IL 200mA/DIV IL 0.5A/DIV 0mA 0mA V 500ns/DIV 3458L G20 V 200 IN = 3.3V μs/DIV IN = 3.3V 3458L G21 VOUT = 5V VOUT = 5V RT = 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 3458L G22 V 500 IN = 3.3V μs/DIV 3458L G23 VOUT = 5V VOUT = 5V L = 10μH L = 10μH COUT = 22μF CBURST = 0.015μF RILIM = 110k RBURST = 133k RILIM = 110k
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 R 200μs/DIV R 3458L G24 ILIM = 110k 200μs/DIV ILIM = 110k 3458L G25 3458lfa 6
W U 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 VOUT 200mV/DIV SYNC 2V/DIV COMP 500mV/DIV IL 200mA/DIV IL 0.5A/DIV 0mA 0mA V 500ns/DIV 3458L G20 V 200 IN = 3.3V μs/DIV IN = 3.3V 3458L G21 VOUT = 5V VOUT = 5V RT = 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 3458L G22 V 500 IN = 3.3V μs/DIV 3458L G23 VOUT = 5V VOUT = 5V L = 10μH L = 10μH COUT = 22μF CBURST = 0.015μF RILIM = 110k RBURST = 133k RILIM = 110k
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 R 200μs/DIV R 3458L G24 ILIM = 110k 200μs/DIV ILIM = 110k 3458L G25 3458lfa 6