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LTC3554EPD Datasheet(PDF) 3 Page - Linear Technology |
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LTC3554EPD Datasheet(HTML) 3 Page - Linear Technology |
3 / 36 page LTC3554 3 3554f POWER MANAGER ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VUVLO VBUS Undervoltage Lockout Rising Threshold Falling Threshold 3.5 3.8 3.6 3.9 V V VDUVLO VBUS to BAT Differential Undervoltage Lockout Rising Threshold Falling Threshold 0 200 50 300 mV mV RON_ILIM Input Current Limit Power FET On-Resistance (Between VBUS and VOUT) 350 mΩ Battery Charger VFLOAT VBAT Regulated Output Voltage 0 ≤ TA ≤ 85°C 4.179 4.165 4.2 4.2 4.221 4.235 V V ICHG Constant-Current Mode Charge Current RPROG = 1.87k, 0 ≤ TA ≤ 85°C 380 400 420 mA VPROG VPROG,TRKL PROG Pin Servo Voltage PROG Pin Servo Voltage in Trickle Charge VBAT < VTRKL 1 0.1 V V hPROG Ratio of IBAT to PROG Pin Current 750 mA/mA ITRKL Trickle Charge Current VBAT < VTRKL 30 40 50 mA VTRKL Trickle Charge Threshold Voltage VBAT Rising VBAT Falling 2.6 2.9 2.75 3V V ΔVRECHRG Recharge Battery Threshold Voltage Threshold Voltage Relative to VFLOAT –75 –100 –115 mV tTERM Safety Timer Termination Period Timer Starts when VBAT = VFLOAT – 50mV 3.2 4 5 Hour tBADBAT Bad Battery Termination Time VBAT < VTRKL 0.4 0.5 0.63 Hour hC/10 End-of-Charge Indication Current Ratio (Note 6) 0.085 0.1 0.115 mA/mA RON_CHG Battery Charger Power FET On-Resistance (Between VOUT and BAT) IBAT = 200mA 220 mΩ TLIM Junction Temperature in Constant Temperature Mode 110 °C NTC VCOLD Cold Temperature Fault Threshold Voltage Rising NTC Voltage Hysteresis 75 76 1.3 77 %VBUS %VBUS VHOT Hot Temperature Fault Threshold Voltage Falling NTC Voltage Hysteresis 34 35 1.3 36 %VBUS %VBUS VDIS NTC Disable Threshold Voltage Falling NTC Voltage Hysteresis l 1.2 1.7 50 2.2 %VBUS mV INTC NTC Leakage Current VNTC = VBUS = 5V –50 50 nA Ideal Diode VFWD Forward Voltage Detection (Note 12) 15 mV RDROPOUT Diode On-Resistance, Dropout IOUT = 200mA, VBUS = 0V 240 mΩ IMAX Diode Current Limit (Note 7) 1 A Logic Inputs (HPWR, SUSP) VIL Input Low Voltage 0.4 V VIH Input High Voltage 1.2 V RPD Internal Pull-Down Resistance 4 MΩ Logic Output (CHRG) VOL Output Low Voltage ICHRG = 5mA 65 250 mV ICHRG Output Hi-Z Leakage Current VBAT = 4.5V, VCHRG = 5V 0 1 μA The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VBUS = 5V, VBAT = 3.8V, HPWR = SUSP = PWR_ON1 = PWR_ON2 = 0V, RPROG = 1.87k, STBY = High, unless otherwise noted. |
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