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LTC3812EFE-5-TRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3812EFE-5-TRPBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 32 page  LTC3812-5 3 38125fb SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop INTVCC INTVCC Supply Voltage l 4.35 14 V IQ INTVCC Supply Current INTVCC Shutdown Current RUN/SS > 1.5V (Notes 4, 5) RUN/SS = 0V 3 224 6 600 mA μA IBOOST BOOST Supply Current RUN/SS > 1.5V (Note 5) RUN/SS = 0V 240 0 400 5 μA μA VFB Feedback Voltage (Note 4) 0°C to 85°C –40°C to 85°C –40°C to 125°C (I-grade) l l l 0.796 0.794 0.792 0.792 0.800 0.800 0.800 0.800 0.804 0.806 0.806 0.808 V V V V ΔVFB,LINE Feedback Voltage Line Regulation 5V < INTVCC < 14V (Note 4) l 0.002 0.02 %/V VSENSE(MAX) Maximum Current Sense Threshold VRNG = 2V, VFB = 0.76V VRNG = 0V, VFB = 0.76V VRNG = INTVCC, VFB = 0.76V 256 70 170 320 95 215 384 120 260 mV mV mV VSENSE(MIN) Minimum Current Sense Threshold VRNG = 2V, VFB = 0.84V VRNG = 0V, VFB = 0.84V VRNG = INTVCC, VFB = 0.84V –300 –85 –200 mV mV mV IVFB Feedback Current VFB = 0.8V 20 150 nA AVOL(EA) Error Amplifier DC Open-Loop Gain 65 100 dB fU Error Amp Unity Gain Crossover Frequency (Note 6) 25 MHz VFCB FCB Threshold VFCB Rising 0.75 0.8 0.85 V IFCB FCB Current FCB = 5V 0 1 μA VRUN/SS Shutdown Threshold 1.2 1.5 2 V IRUN/SS RUN/SS Source Current RUN/SS = 0V 0.7 1.4 2.5 μA VVCCUV INTVCC Undervoltage Lockout Linear Regulator Mode External Supply Mode Trickle-Charge Mode INTVCC Rising, INDRV = 100μA INTVCC Rising, NDRV = INTVCC = EXTVCC INTVCC Rising, NDRV = INTVCC, EXTVCC = 0 INTVCC Falling l l l 4.05 4.05 8.70 4.2 4.2 9.0 3.7 4.35 4.35 9.30 V V V V Oscillator tON On-Time ION = 100μA ION = 300μA 1.55 515 1.85 605 2.15 695 μs ns tON(MIN) Minimum On-Time ION = 2500μA 100 ns tOFF(MIN) Minimum Off-Time 250 350 ns Driver IBG,PEAK BG Driver Peak Source Current VBG = 0V 0.7 1 A RBG,SINK BG Driver Pull-Down RDS(ON) 1 1.5 Ω ITG,PEAK TG Driver Peak Source Current VTG – VSW = 0V 0.7 1 A RTG,SINK TG Driver Pull-Down RDS(ON) 1 1.5 Ω PGOOD Output ΔVFBOV PGOOD Upper Threshold PGOOD Lower Threshold VFB Rising VFB Falling 7.5 –7.5 10 –10 12.5 –12.5 % % ΔVFB,HYST PGOOD Hysterisis VFB Returning 1.5 3 % VPGOOD PGOOD Low Voltage IPGOOD = 5mA 0.3 0.6 V The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, INTVCC = VBOOST = VRNG = VEXTVCC = VNDRV = 5V, VFCB = VSW = 0V, unless otherwise specified. ELECTRICAL CHARACTERISTICS |
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