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LTC3443 Datasheet(PDF) 3 Page - Linear Technology |
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LTC3443 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page LTC3443 3 sn3443 3443fs Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC3443E is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Current measurements are performed when the outputs are not switching. Note 4: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may result in device degradation or failure. ELECTRICAL CHARACTERISTICS TYPICAL PERFOR A CE CHARACTERISTICS VOUT Ripple at 1A Load VOUT 20mV/DIV AC-COUPLED BUCK VIN = 4.2V BUCK-BOOST VIN = 3.3V BOOST VIN = 2.7V IOUT = 1A 2µs/DIV 3443 G02 VOUT = 3.3V Li-Ion to 3.3V Efficiency OUTPUT CURRENT (mA) 0.1 40 50 60 70 80 1.0 10 100 1000 3443 G01 30 20 10 0 90 100 Burst Mode OPERATION VIN = 4.2V VIN = 3.3V VIN = 2.7V (TA = 25°C unless otherwise specified) Load Transient Response, 100mA to 1A VOUT 100mV/DIV 1A 100mA 100µs/DIV 3443 G03 MODE Transient Response: Burst Mode Operation to Fixed Frequency VOUT 200mV/DIV AC-COUPLED MODE 5V/DIV VOUT = 3.3V 500µs/DIV 3443 G03 VIN = 3.3V IOUT = 30mA VOUT 100mV/DIV AC-COUPLED MODE 5V/DIV VOUT = 3.3V 500µs/DIV 3443 G03 VIN = 3.3V IOUT = 30mA MODE Transient Response: Fixed Frequency to Burst Mode Operation |
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