Datasheet LTC3458 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| Pages / Page | 16 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Fixed Frequency (FF). Discontinuous … |
| File Format / Size | PDF / 320 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Fixed Frequency (FF). Discontinuous Current. Continuous Current
Model Line for this Datasheet
Text Version of Document
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
