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LTC3851IMSE-1-PBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3851IMSE-1-PBF Datasheet(HTML) 3 Page - Linear Technology |
3 / 28 page LTC3851-1 3 38511f ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops VIN Input Operating Voltage Range 4 38 V VFB Regulated Feedback Voltage ITH = 1.2V (Note 4) l 0.792 0.800 0.808 V IFB Feedback Current (Note 4) –10 –50 nA VREFLNREG Reference Voltage Line Regulation VIN = 6V to 38V (Note 4) 0.002 0.02 %/V VLOADREG Output Voltage Load Regulation (Note 4) Measured in Servo Loop, ΔITH = 1.2V to 0.7V l 0.01 0.1 % (Note 4) Measured in Servo Loop, ΔITH = 1.2V to 1.6V l –0.01 –0.1 % gm Transconductance Amplifier gm ITH = 1.2V, Sink/Source = 5μA (Note 4) 2 mmho gm GBW Transconductance Amp Gain Bandwidth ITH = 1.2V 3 MHz IQ Input DC Supply Current Normal Mode Shutdown (Note 5) VOUT = 5V VRUN = 0V 1 20 35 mA μA UVLO Undervoltage Lockout on INTVCC VINTVCC Ramping Down 3.25 V UVLO Hys UVLO Hysteresis 0.4 V VOVL Feedback Overvoltage Lockout Measured at VFB l 0.86 0.88 0.90 V ISENSE SENSE Pins Total Current ±1 ±2 μA ITK/SS Soft-Start Charge Current VTK/SS = 0V 0.6 1 2 μA VRUN RUN Pin On Threshold VRUN Rising l 1.10 1.22 1.35 V VRUNHYS RUN Pin On Hysteresis 130 mV VSENSE(MAX) Maximum Current Sense Threshold VFB = 0.7V, VSENSE = 3.3V l 40 50 65 mV TG RUP TG Driver Pull-Up On-Resistance TG High 2.6 Ω TG RDOWN TG Driver Pull-Down On-Resistance TG Low 1.5 Ω BG RUP BG Driver Pull-Up On-Resistance BG High 2.4 Ω BG RDOWN BG Driver Pull-Down On-Resistance BG Low 1.1 Ω TG tr TG tf TG Transition Time Rise Time Fall Time (Note 6) CLOAD = 3300pF CLOAD = 3300pF 25 25 ns ns BG tr BG tf BG Transition Time Rise Time Fall Time (Note 6) CLOAD = 3300pF CLOAD = 3300pF 25 25 ns ns TG/BG t1D Top Gate Off to Bottom Gate On Delay Synchronous Switch-On Delay Time CLOAD = 3300pF Each Driver 30 ns BG/TG t2D Bottom Gate Off to Top Gate On Delay Top Switch-On Delay Time CLOAD = 3300pF Each Driver 30 ns tON(MIN) Minimum On-Time (Note 7) 90 ns INTVCC Linear Regulator VINTVCC Internal VCC Voltage 6V < VIN < 38V 4.8 5 5.2 V VLDO INT INTVCC Load Regulation ICC = 0mA to 50mA 0.5 % The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN = 5V unless otherwise noted. |
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Similar Description - LTC3851IMSE-1-PBF |
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