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LTC3101 Datasheet(PDF) 3 Page - Linear Technology |
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LTC3101 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 34 page  LTC3101 3 3101fb ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VUSB1 = VUSB2 = VBAT1 = VBAT2 = 3V and VOUT3 = 3.3V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Duty Cycle l 0% ENA1 Input Logic Threshold l 0.3 0.7 1.0 V ENA1 Pull-Down Resistance VPWRON = 3V or VPWRKEY = 0V 4.0 MΩ N-Channel Switch Resistance 0.34 Ω P-Channel Switch Resistance Battery Powered USB Powered 0.55 0.58 Ω Ω N-Channel Switch Leakage VSW1 = VUSB1,2 = VBAT1,2 = 5.5V 0.1 5 μA P-Channel Switch Leakage VSW1 = 0V, VUSB1,2 = VBAT1,2 = 5.5V 0.1 10 μA Power Good Threshold VFB1 Falling l –11 –8 –5 % Power Good Hysteresis 2.5 % Buck Converter 2 Feedback Voltage (FB2 Pin) l 583 596 609 mV Feedback Pin Input Current (FB2 Pin) 150 nA P-Channel Current Limit Battery Powered (Note 3) USB Powered (Note 3) 440 440 540 540 mA mA Maximum Duty Cycle l 100 % Minimum Duty Cycle l 0% ENA2 Input Logic Threshold l 0.3 0.7 1.0 V ENA2 Pull-Down Resistance VPWRON = 3V or VPWRKEY = 0V 4.0 MΩ N-Channel Switch Resistance 0.34 Ω P-Channel Switch Resistance Battery Powered USB Powered 0.55 0.58 Ω Ω N-Channel Switch Leakage VSW2 = VUSB1,2 = VBAT1,2 = 5.5V 0.1 5 μA P-Channel Switch Leakage VSW2 = 0V, VUSB1,2 = VBAT1,2 = 5.5V 0.1 10 μA Power Good Threshold VFB2 Falling l –11 –8 –5 % Power Good Hysteresis 2.5 % Buck-Boost Converter Operating Output Voltage l 1.5 5.25 V Feedback Voltage (FB3 Pin) l 584 599 614 mV Feedback Pin Input Current (FB3 Pin) 150 nA Inductor Current Limit BAT or USB Powered (Note 3) 1.2 1.5 A Reverse Inductor Current Limit (Note 3) 400 mA Burst Mode Inductor Current Limit (Note 3) 450 mA Maximum Duty Cycle Percentage of Period SW3B is Low in Boost Mode l 82 87 % Minimum Duty Cycle Percentage of Period SW3A is High in Buck Mode l 0% ENA3 Input Logic Threshold l 0.3 0.7 1.0 V ENA3 Pull-Down Resistance VPWRON = 3V or VPWRKEY = 0V 4.0 MΩ N-Channel Switch Resistance Switch B (From SW3A to GND) Switch C (From SW3B to GND) 0.150 0.140 Ω Ω P-Channel Switch Resistance Switch A´ (From BAT2 to SW3A) Switch A (From USB2 to SW3A) Switch D (From OUT3 to SW3B) 0.150 0.180 0.195 Ω Ω Ω |
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