Datasheet LTC3458 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | 1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| Páginas / Página | 16 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Fixed Frequency (FF). Discontinuous … |
| Formato / tamaño de archivo | PDF / 320 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFOR A CE CHARACTERISTICS. Fixed Frequency (FF). Discontinuous Current. Continuous Current
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LTC3458
W U TYPICAL PERFOR A CE CHARACTERISTICS Fixed Frequency (FF) Fixed Frequency (FF) Discontinuous Current Continuous Current
IL 200mA/DIV SW 2V/DIV SW 2V/DIV IL 100mA/DIV 0mA 0mA V 200ns/DIV V 200ns/DIV IN = 3.3V IN = 3.3V VOUT = 7V VOUT = 7V L = 10μH L = 10μH
Over-Current with 1.5A ILIMIT Burst Mode Operation
VOUT 100mV/DIV SW 2V/DIV SW 5V/DIV IL 0.5A/DIV IL 200mA/DIV 0mA 0mA V 1 IN = 3.3V μs/DIV VIN = 3.3V 50μs/DIV VOUT = 7V VOUT = 7V L = 10μH L = 10μH RILIM = 133k COUT = 22μF CFF = 22pF
Burst Mode Operation Close-Up Soft-Start into 50
Ω
Load
VOUT 100mV/DIV VOUT 2V/DIV VIN 2V/DIV SW 5V/DIV SS 200mV/DIV I I L L 200mA/DIV 200mA/DIV 0mA VIN = 3.3V 2μs/DIV V 5ms/DIV IN = 3.3V VOUT = 7V VOUT = 7V L = 10μH L = 10μH COUT = 22μF CFF = 22pF 3458fa 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Fixed Frequency (FF) Fixed Frequency (FF) Discontinuous Current Continuous Current
IL 200mA/DIV SW 2V/DIV SW 2V/DIV IL 100mA/DIV 0mA 0mA V 200ns/DIV V 200ns/DIV IN = 3.3V IN = 3.3V VOUT = 7V VOUT = 7V L = 10μH L = 10μH
Over-Current with 1.5A ILIMIT Burst Mode Operation
VOUT 100mV/DIV SW 2V/DIV SW 5V/DIV IL 0.5A/DIV IL 200mA/DIV 0mA 0mA V 1 IN = 3.3V μs/DIV VIN = 3.3V 50μs/DIV VOUT = 7V VOUT = 7V L = 10μH L = 10μH RILIM = 133k COUT = 22μF CFF = 22pF
Burst Mode Operation Close-Up Soft-Start into 50
Ω
Load
VOUT 100mV/DIV VOUT 2V/DIV VIN 2V/DIV SW 5V/DIV SS 200mV/DIV I I L L 200mA/DIV 200mA/DIV 0mA VIN = 3.3V 2μs/DIV V 5ms/DIV IN = 3.3V VOUT = 7V VOUT = 7V L = 10μH L = 10μH COUT = 22μF CFF = 22pF 3458fa 5