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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC3554 датащи(PDF) 6 Page - Linear Technology |
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LTC3554 датащи(HTML) 6 Page - Linear Technology |
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6 / 36 page  LTC3554 6 3554f VBUS Supply Current vs Temperature VBUS Supply Current vs Temperature (Suspend Mode) Battery Drain Current vs Temperature VBUS Current Limit vs Temperature Note 3. This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperatures will exceed 110°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may result in device degradation or failure. Note 4. VCC is the greater of VBUS or BAT. Note 5. Total Battery Drain Current is the sum of IBATQ and IOUT. For example, in applications where the buck input (BVIN pin) is connected to the PowerPath output (VOUT pin) such that IOUT = IBVIN, total battery drain current = IBATQ + IBVIN. Note 6. hC/10 is expressed as a fraction of programmed full charge current with specified PROG resistor. Note 7. The current limit features of this part are intended to protect the IC from short term or intermittent fault conditions. Continuous operation above the absolute maximum specified pin current rating may result in device degradation or failure. Note 8. FB High, Not Switching Note 9. VOUT not in UVLO. Note 10. PGOOD threshold is expressed as a percentage difference from the buck regulation voltage. The threshold is measured with the buck feedback pin voltage rising. Note 11. See the Operation section of this data sheet for detailed explanation of the pushbutton state machine and the effects of each state on switching regulator and power manager operation. Note 12. If VBUS < VUVLO then VFWD = 0 and the forward voltage across the ideal diode is equal to its current times RDROPOUT. TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise specified. ELECTRICAL CHARACTERISTICS TEMPERATURE (°C) –75 200 300 350 400 –25 25 50 150 3554 G01 250 –50 0 75 100 125 VBUS = 5V HPWR = L TEMPERATURE (°C) –75 0 10 15 25 20 –25 25 50 150 3554 G02 5 –50 0 75 100 125 VBUS = 5V TEMPERATURE (°C) –75 –50 –25 25 50 75 100 125 0 0 4 6 10 14 12 8 3554 G03 2 BOTH REGULATORS DISABLED ONE REGULATOR ENABLED HARD RESET BOTH REGULATORS ENABLED VBAT = 3.8V STBY = 3.8V REGULATORS LOAD = 0mA TEMPERATURE (°C) –75 0 2 3 5 4 –25 25 50 150 3554 G03b 1 –50 0 75 100 125 VBUS = 5V VBAT = 3.8V TEMPERATURE (°C) –75 0 200 300 500 400 –25 25 50 3554 G04 100 –50 0 75 100 125 VBUS = 5V HPWR = H HPWR = L Battery Drain Current vs Temperature (Suspend Mode) LOAD CURRENT (mA) 0 100 300 500 400 200 –100 100 200 400 600 500 300 3554 G05 0 RPROG = 1.87k IVBUS ILOAD IBAT (CHARGING) IBAT (DISCHARGING) VBUS and Battery Current vs Load Current |
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