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LTC3577 Datasheet(PDF) 8 Page - Linear Technology |
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LTC3577 Datasheet(HTML) 8 Page - Linear Technology |
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8 / 54 page  LTC3577/LTC3577-1 8 3577fa ELECTRICAL CHARACTERISTICS 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. LED Boost Switching Regulator. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN3 = VOUT = 3.8V, ROV = 10M, RLED_FS = 20k, boost regulator disabled unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN3, VOUT Operating Supply Range (Note 9) l 2.7 5.5 V IVOUT_LED Operating Quiescent Current Shutdown Quiescent Current (Notes 10, 14) 560 0.01 μA μA VLED_OV LED_OV Overvoltage Threshold LED_OV Rising LED_OV Falling 0.6 1.0 0.85 1.25 V V ILIM Peak NMOS Switch Current 800 1000 1200 mA ILED_FS ILED Pin Full-Scale Operating Current 18 20 22 mA ILED_DIM ILED Pin Full-Scale Dimming Range 64 Steps 60 dB RNSWON RDS(ON) of NMOS Switch 240 mΩ INSWOFF NMOS Switch-Off Leakage Current VSW = 5.5V 0.01 1 μA fOSC Oscillator Frequency 0.95 1.125 1.3 MHz VLED_FS LED_FS Pin Voltage l 780 800 820 mV ILED_OV LED_OV Pin Current RLED_FS = 20k l 3.8 4 4.2 μA DBOOST Maximum Duty Cycle ILED = 0 97 % VBOOSTFB Boost Mode ILED Feedback Voltage l 775 800 825 mV SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ILDO1_SC Short-Circuit Output Current 270 mA VDROP1 Dropout Voltage (Note 12) ILDO1 = 150mA, VINLDO1 = 3.6V ILDO1 = 150mA, VINLDO1 = 2.5V ILDO1 = 75mA, VINLDO1 = 1.8V 160 200 170 260 320 280 mV mV mV RLDO1_PD Output Pull-Down Resistance in Shutdown LDO1 Disabled 10 kΩ LDO Regulator 2 (LDO2 – Enabled via I2C) VINLDO2 Input Voltage Range VINLDO2 ≤ VOUT + 0.3V l 1.65 5.5 V VOUT_UVLO VOUT Falling VOUT Rising LDO2 is Disabled Below VOUT UVLO 2.5 2.7 2.8 2.9 V V IQLDO2_VO IQLDO2_VI LDO2 VOUT Quiescent Current LDO2 VINLDO2 Quiescent Current LDO2 Enabled, PON State, ILDO2 = 0mA LDO2 Enabled, PON State, ILDO2 = 0mA 18 0.1 30 2 μA μA IVINLDO2 Shutdown Current LDO2 Disabled, PON or POFF State 0.01 1 μA VLDO2_FB LDO2_FB Regulated Output Voltage ILDO2 = 1mA l 0.78 0.8 0.82 V LDO2_FB Line Regulation (Note 11) ILDO2 = 1mA, VIN = 1.65V to 5.5V 0.4 mV/V LDO2_FB Load Regulation (Note 11) ILDO2 = 1mA to 150mA 5 μV/mA ILDO2_FB LDO2_FB Input Current LDO2_FB = 0.8V –50 50 nA ILDO2_OC Available Output Current l 150 mA ILDO2_SC Short-Circuit Output Current 270 mA VDROP2 Dropout Voltage (Note 12) ILDO2 = 150mA, VINLDO2 = 3.6V ILDO2 = 150mA, VINLDO2 = 2.5V ILDO1 = 75mA, VINLDO1 = 1.8V 160 200 170 260 320 280 mV mV mV RLDO2_PD Output Pull-Down Resistance in Shutdown LDO2 Disabled 14 kΩ |
Similar Part No. - LTC3577_15 |
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Similar Description - LTC3577_15 |
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