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LTC4055 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4055 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 24 page  3 LTC4055 4055p The q indicates specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN1 = VIN2 = 5V, VBAT = 3.5V, HPWR = 5V, WALL = 0V, RPROG = RCLPROG = 100k, unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Battery Charger VFLOAT Regulated Output Voltage (0 °C to 85°C) 4.165 4.200 4.235 V q 4.158 4.200 4.242 V IBAT Current Mode Charge Current RPROG = 100k, HPWR = 5V, No Load q 445 485 525 mA RPROG = 100k, HPWR = 0V, No Load q 55 80 105 mA RPROG = 100k, VOUT = 5V, VIN = 0V, q 445 485 525 mA VWALL = 2V RPROG = 50k, HPWR = 5V, No Load q 900 980 1060 mA RPROG = 50k, VOUT = 5V, VIN = 0V, q 900 980 1060 mA VWALL = 2V IBAT(MAX) Maximum Charge Current (Note 8) 1 A ∆IB/∆IO Charge Current Load Dependency ∆IBAT/∆IOUT, IOUT = 100mA q 0.95 1 1.05 mA/mA ITRKL Trickle Charge Current VBAT = 2V, RPROG = 100k 30 45 60 mA VTRKL Trickle Charge Threshold Voltage VBAT Rising q 2.7 2.85 3 V VCENI Input Charger Enable Threshold (VIN – VBAT) High to Low 70 mV Voltage (VIN – VBAT) Low to High 80 mV VCENO Output Charger Enable Threshold (VOUT – VBAT) High to Low 70 mV Voltage (VOUT – VBAT) Low to High 80 mV VUVCL Input/Output Undervoltage Current IBAT = ICHG/2 q 4.23 4.3 4.37 V Limit VRECHRG Recharge Battery Threshold Voltage VFLOAT – VRECHRG q 65 100 135 mV tTIMER TIMER Accuracy CTIMER = 0.1µF ±10 % Recharge Time Percent of Total Charge Time 50 % Low-Battery Trickle Charge Time Percent of Total Charge Time, VBAT < 2.8V 25 % TLIM Junction Temperature in Constant 105 °C Temperature Mode Ideal Diode RFWD On Resistance, VON Regulation VBAT = 3.5V, 100mA Load 0.1 Ω RDIO,ON On Resistance VBAT to VOUT VBAT = 3.5V, 600mA Load 0.2 Ω VFWD Voltage Forward Drop (VBAT – VOUT)VBAT = 3.5V, 5mA Load q 10 30 50 mV VBAT = 3.5V, 100mA Load 55 mV VBAT = 3.5V, 600mA 120 mV VOFF Diode Disable Battery Voltage VBAT Falling 2.8 V IFWD Load Current Limit for VON Regulation VIN = 3.5V 550 mA IMAX Diode Current Limit VBAT = 3.5V, VOUT = 2.8V, Pulsed with 1.4 1.8 2.2 A 10% Duty Cycle Logic VOL Output Low Voltage (CHRG, ACPR) ISINK = 5mA q 0.2 0.4 V VIH Enable Input High Voltage SUSP, SHDN, HPWR Pin Low to High q 1.2 V VIL Enable Input Low Voltage SUSP, SHDN, HPWR Pin High to Low q 0.4 V IPULLDN Logic Input Pull-Down Current SUSP, SHDN, HPWR 2 µA VCHG,SD Charger Shutdown Threshold Voltage TIMER Falling q 0.15 0.4 V on TIMER ICHG,SD Charger Shutdown Pull-Up Current VTIMER = 0V q 24 µA on TIMER VWALL Wall Input Threshold Voltage VWALL Rising Threshold q 0.98 1.000 1.02 V VWALL,HYS Wall Input Hysteresis VWALL Rising – VWALL Falling Threshold 35 mV IWALL Wall Input Leakage Current VWALL = 1V 0 ±50 nA |
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Similar Description - LTC4055 |
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