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LTC3890-2 Datasheet(PDF) 3 Page - Linear Technology |
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LTC3890-2 Datasheet(HTML) 3 Page - Linear Technology |
3 / 40 page LTC3890-2 3 38902f SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Input Supply Operating Voltage Range 4 60 V VOUT Regulated Output Voltage Range 0.8 24 V VFB1,2 Regulated Feedback Voltage (Note 4) ITH1,2 Voltage = 1.2V –40°C to 85°C, All Grades LTC3890E-2, LTC3890I-2 LTC3890H-2, LTC3890MP-2 l l 0.792 0.788 0.786 0.800 0.800 0.800 0.808 0.812 0.812 V V V IFB1,2 Feedback Current (Note 4) ±5 ±50 nA VREFLNREG Reference Voltage Line Regulation (Note 4) VIN = 4.5V to 60V 0.002 0.02 %/V VLOADREG Output Voltage Load Regulation (Note 4) Measured in Servo Loop, ΔITH Voltage = 1.2V to 0.7V l 0.01 0.1 % (Note 4) Measured in Servo Loop, ΔITH Voltage = 1.2V to 2V l –0.01 –0.1 % gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA 2 mmho IQ Input DC Supply Current (Note 5) Pulse-Skipping or Forced Continuous Mode (One Channel On) RUN1 = 5V and RUN2 = 0V, VFB1 = 0.83V or RUN1 = 0V and RUN2 = 5V, VFB2 = 0.83V 1.3 mA Pulse-Skipping or Forced Continuous Mode (Both Channels On) RUN1,2 = 5V, VFB1,2 = 0.83V (No Load) 2 mA Sleep Mode (One Channel On) RUN1 = 5V and RUN2 = 0V, VFB1 = 0.83V (No Load) or RUN1 = 0V and RUN2 = 5V, VFB2 = 0.83V (No Load) 50 75 μA Sleep Mode (Both Channels On) RUN1,2 = 5V, VFB1,2 = 0.83V (No Load) 60 100 μA Shutdown RUN1,2 = 0V 14 25 μA UVLO Undervoltage Lockout INTVCC Ramping Up INTVCC Ramping Down l l 3.6 3.92 3.80 4.2 4.0 V V ISENSE+ SENSE+ Pin Current Each Channel ±1 μA ISENSE– SENSE– Pins Current Each Channel VSENSE– < INTVCC – 0.5V VSENSE– > INTVCC + 0.5V 700 ±1 μA μA Maximum TG1, 2 Duty Factor In Dropout 98 99 % ITRACK/SS1,2 Soft-Start Charge Current VTRACK/SS1,2 = 0V 0.7 1.0 1.4 μA VRUN1 VRUN2 RUN1 Pin On Threshold RUN2 Pin On Threshold VRUN1 Rising VRUN2 Rising l l 1.15 1.20 1.21 1.25 1.27 1.30 V V RUN1,2 Pin Hysteresis 50 mV VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1–,2– = 3.3V, ILIM = 0 VFB1,2 = 0.7V, VSENSE1–,2– = 3.3V, ILIM = INTVCC VFB1,2 = 0.7V, VSENSE1–,2– = 3.3V, ILIM = FLOAT l l l 22 43 64 30 50 75 36 57 85 mV 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. VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted. (Note 2) |
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Similar Description - LTC3890-2_15 |
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