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LTC3589 数据表(PDF) 5 Page - Linear Technology |
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LTC3589 数据表(HTML) 5 Page - Linear Technology |
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5 / 50 page  LTC3589/LTC3589-1/ LTC3589-2 5 3589fe SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LDO Regulators tLDO_SS Soft-Start Time LDO2, LDO3, LDO4 100 μs RLDO_PD Output Pull-Down Resistance LDO2, LDO3, LDO4 LDO Disabled 2.5 kΩ Always-On Regulator (LDO1_STDBY) VLDO1_FB LDO1 Feedback Voltage l 0.76 0.8 0.84 V VLDO1 LDO1 Line Regulation ILDO1_STBY = 1mA, LDO1_STBY = 1.2V, VIN = 2.7V to 5.5V 0.15 %/V LDO1 Load Regulation ILDO1 = 0.1mA to 25mA, LDO1_STBY = 1.2V 0.1 % ILDO1 Available Output Current l 25 mA ILDO1_SC Short-Circuit Output Current Limit 65 100 mA VDROP1 Dropout Voltage (Note 4) ILDO1 = 25mA, LDO1_STBY = 3.3V 200 mV ILDO1_FB LDO1_FB Input Current VLDO1_FB = 0.85V –50 50 nA LDO Regulator 2 (LDO2) VIN_LDO2 VIN_LDO2 Input Voltage Range l 1.7 VIN V IVIN_LDO2 VIN_LDO2 Quiescent Current VIN_LDO2 Shutdown Current Regulator Enabled Regulator Disabled l l 12 0 20 1 μA μA IVIN VIN Quiescent Current EN_LDO2 = High l 50 85 μA VFB2(MAX) LDO2 Maximum Feedback Voltage L2DTV1 = L2DTV2 = 11111 l 0.735 0.75 0.765 V VFB2(LSB) LDO2 Feedback LSB Step Size 12.5 mV VFB2(MIN) LDO2 Minimum Feedback Voltage L2DTV1 = L2DTV2 = 00000 VIN_LDO2 = VIN = 2.7V to 5.5V, ILDO2 = 1mA l 0.351 0.3625 0.374 V LDO2 Line Regulation ILDO2 =1mA, VINLDO2 = 2.7V to 5.5V 0.01 %/V LDO2 Load Regulation ILDO2 = 1mA to 250mA 0.01 % IOUT2 LDO2 Available Output Current l 250 mA ISC2 LDO2 Short-Circuit Current Limit 300 450 600 mA VDROP2 Dropout Voltage (Note 4) ILDO2 = 200mA, VLDO2 = 2.5V ILDO2 = 200mA, VLDO2 = 1.2V 140 350 180 500 mV mV ILDO2_FB LDO2_FB Input Current VLDO2_FB = 0.8V –50 50 nA LDO Regulator 3 (LDO3) VIN_LDO34 VIN_LDO34 Input Range (LTC3589) VIN_LDO34 Input Range (LTC3589-1/LTC3589-2) l l 2.35 3.0 VIN VIN V V IVIN_LDO34 VIN_LDO34 Quiescent Current VIN_LDO34 Shutdown Current Regulator Enabled Regulator Disabled l l 15 0 29 1 μA μA IVIN VIN Quiescent Current l 50 85 μA VLDO3 LDO3 Output Voltage (LTC3589) LDO3 Output Voltage (LTC3589-1/LTC3589-2) VIN_LDO34 = VIN = 2.7V to 5V, ILDO3 = 1mA l l 1.746 2.716 1.8 2.8 1.854 2.884 V V LD03 Line Regulation ILDO3 =1mA, VINLDO34 = 2.7V to 5.5V 0.01 %/V LDO3 Load Regulation ILDO3 = 1mA to 250mA 0.05 % ILDO3 LDO3 Available Output Current l 250 mA ILDO3_SC LDO3 Short-Circuit Current Limit 300 450 600 mA VDROP3 LDO3 Dropout Voltage (LTC3589) (Note 4) LDO3 Dropout Voltage (LTC3589-1/LTC3589-2) (Note 4) ILDO3 = 200mA, VLDO3 = 1.8V ILDO3 = 200mA, VLDO3 = 2.8V 190 140 250 180 mV mV ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = PVIN1 = PVIN2 = PVIN3 = PVIN4 = VIN_LDO2 = VIN_LDO34 = DVDD = 3.8V. All regulators disabled unless otherwise noted. |
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