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LTC3577 Datasheet(PDF) 7 Page - Linear Technology |
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LTC3577 Datasheet(HTML) 7 Page - Linear Technology |
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7 / 52 page  LTC3577/LTC3577-1 7 3577f ELECTRICAL CHARACTERISTICS Step-Down Switching Regulators. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VOUT = VIN12 = VIN3 = 3.8V, all regulators enabled unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LDO Regulator 1 (LDO1 – Enabled Via I2C) VINLDO1 Input Voltage Range VINLDO1 ≤ VOUT + 0.3V l 1.65 5.5 V VOUT_UVLO VOUT Falling VOUT Rising LDO1 is Disabled Below VOUT UVLO 2.5 2.7 2.8 2.9 V V IQLDO1_VO IQLDO1_VI LD01 VOUT Quiescent Current LD01 VINLDO1 Quiescent Current LDO1 Enabled, PON State, ILDO1 = 0mA LDO1 Enabled, PON State, ILDO1 = 0mA 18 0.1 30 2 μA μA IVINLDO1 Shutdown Current LDO1 Disabled, PON or POFF State 0.01 1 μA VLDO1_FB LDO1_FB Regulated Feedback Voltage ILDO1 = 1mA l 0.78 0.8 0.82 V LDO1_FB Line Regulation (Note 11) ILDO1 = 1mA, VIN = 1.65V to 5.5V 0.4 mV/V LDO1_FB Load Regulation (Note 11) ILDO1 = 1mA to 150mA 5 μV/mA ILDO1_FB LDO1_FB Input Current LDO1_FB = 0.8V –50 50 nA ILDO1_OC Available Output Current l 150 mA SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RSW3_PD SW3 Pull-Down in Shutdown POFF State 10 kΩ 500mA Step-Down Switching Regulator 2 (Buck2 – Pushbutton Enabled, Second in Sequence) IVIN12Q Pulse-Skipping Mode Input Current (Note 10) 100 μA Burst Mode Input Current (Note 10) 17 μA Shutdown Input Current 0.01 μA ILIM2 Peak PMOS Current Limit (Note 7) 650 900 1200 mA VFB2 Feedback Voltage Pulse-Skipping Mode Burst Mode Operation l l 0.78 0.78 0.8 0.8 0.82 0.824 V V IFB2 FB2 Input Current (Note 10) –0.05 0.05 μA D2 Max Duty Cycle FB2 = 0V 100 % RP2 RDS(ON) of PMOS ISW2 = 100mA 0.6 Ω RN2 RDS(ON) of NMOS ISW2 = –100mA 0.6 Ω RSW2_PD SW2 Pull-Down in Shutdown POFF State 10 kΩ 500mA Step-Down Switching Regulator 1 (Buck1 – Pushbutton Enabled, First in Sequence) IVIN12Q Pulse-Skipping Mode Input Current (Note 10) 100 μA Burst Mode Input Current (Note 10) 17 μA Shutdown Input Current 0.01 μA ILIM1 Peak PMOS Current Limit (Note 7) 650 900 1200 mA VFB1 Feedback Voltage Pulse-Skipping Mode Burst Mode Operation l l 0.78 0.78 0.8 0.8 0.82 0.824 V V IFB1 FB1 Input Current (Note 10) –0.05 0.05 μA D1 Max Duty Cycle FB1 = 0V 100 % RP1 RDS(ON) of PMOS ISW1 = 100mA 0.6 Ω RN1 RDS(ON) of NMOS ISW1 = –100mA 0.6 Ω RSW1_PD SW1 Pull-Down in Shutdown POFF State 10 kΩ LDO Regulators. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VINLDO1 = VINLDO2 = VOUT = VBAT = 3.8V, LDO1 and LDO2 enabled unless otherwise noted. |
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