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LTC3823IGN Datasheet(PDF) 3 Page - Linear Technology |
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LTC3823IGN Datasheet(HTML) 3 Page - Linear Technology |
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3 / 26 page  LTC3823 3 3823fd ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop IQ Input DC Supply Current Normal Operation Shutdown Supply Current 1400 30 2200 50 μA μA VFB Feedback Voltage Accuracy (Note 3) ITH = 1.2V (0°C to 85°C) ITH = 1.2V l 0.596 0.594 0.6 0.6 0.604 0.606 V V VFB(LINEREG) Feedback Voltage Line Regulation VIN = 4.5V to 30V, ITH = 1.2V (Note 3) 0.002 %/V VFB(LOADREG) Feedback Voltage Load Regulation ITH = 0.5V to 1.9V (Note 3) –0.04 –0.3 % VRUN RUN Pin On Threshold VRUN Rising 1 1.5 1.9 V ISS/TRACK Soft-Start Charge Current VSS/TRACK = 0V –1.3 –1.7 –2.3 μA IFB Feedback Pin Input Current –100 –20 100 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V (Note 3) l 1.65 mS VFCB Forced Continuous Threshold l 0.57 0.6 0.63 V IFCB Forced Continuous Pin Current VFCB = 0V –1 –2 μA tON On-Time ION = –60μA, VON = 1.5V ION = –60μA, VON = 0V 210 80 250 115 290 150 ns ns tON(MIN) Minimum On-Time ION = –180μA, VON = 0V 50 100 ns tOFF(MIN) Minimum Off-Time 280 400 ns VSENSE(MAX) Maximum Current Sense Threshold VRNG = 1V, VFB = 570mV (0°C to 85°C) VRNG = 0V, VFB = 570mV (0°C to 85°C) VRNG = INTVCC, VFB = 570mV (0°C to 85°C) 120 50 240 140 70 280 160 85 320 mV mV mV VSENSE(MIN) Minimum Current Sense Threshold VRNG = 1V, VFB = 630mV VRNG = 0V, VFB = 630mV VRNG = INTVCC, VFB = 630mV –60 –30 –120 mV mV mV ΔVFB(OV) Output Overvoltage Fault Threshold Offset 8 11 14 % VIN(UVLO+) Undervoltage Lockout VIN Falling 3.1 3.4 V VIN(UVLO–) Undervoltage Lockout VIN Rising 3.9 4.1 V TG RUP TG Driver Pull-Up On-Resistance TG High 1.9 2.5 Ω TG RDOWN TG Driver Pull-Down On-Resistance TG Low 1.2 2.5 Ω BG RUP BG Driver Pull-Up On-Resistance BG High 1.9 3 Ω BG RDOWN BG Driver Pull-Down On-Resistance BG Low 0.7 1.5 Ω TG tr TG Rise Time CLOAD = 3300pF 20 ns TG tf TG Fall Time CLOAD = 3300pF 20 ns BG tr BG Rise Time CLOAD = 3300pF 20 ns BG tf BG Fall Time CLOAD = 3300pF 20 ns Internal VCC Regulation VINTVCC Internal VCC Voltage 6V < VIN < 36V l 4.75 5 5.45 V ΔVLDO(LOADREG) Internal VCC Load Regulation ICC = 0mA to 20mA – 0.1 ±2 % Phase-Locked Loop RPLLIN PLLIN Input Resistance 50 kΩ IPLLFLTR Phase Detector Sink Current Phase Detector Source Current fPLLIN < fO fPLLIN > fO –15 15 μA μA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise specified. |
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