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LTC3892 Datasheet(PDF) 4 Page - Linear Technology |
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LTC3892 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 36 page  LTC3892/LTC3892-1 4 38921f For more information www.linear.com/LTC3892 elecTrical characTerisTics The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG1 = FLOAT unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Input Supply Operating Voltage Range 4.5 60 V VFB1 Channel 1 Regulated Feedback Voltage (Note 4) ITH1 Voltage = 1.2V 0°Cto85°C,VPRG1=FLOAT(LTC3892)orLTC3892-1 VPRG1 = FLOAT (LTC3892) or LTC3892-1 VPRG1 = 0V (LTC3892) or LTC3892-1 VPRG1 = INTVCC (LTC3892) or LTC3892-1) l l l 0.792 0.788 3.234 4.890 0.800 0.800 3.3 5.0 0.808 0.812 3.366 5.110 V V V V VFB2 Channel 2 Regulated Feedback Voltage (Note 4) ITH2 Voltage = 1.2V 0°Cto85°C l 0.792 0.788 0.800 0.800 0.808 0.812 V V IFB2 Channel 2 Feedback Current (Note 4) –2 ±50 nA IFB1 Channel 1 Feedback Current (Note 4) VPRG1 = FLOAT (LTC3892) or LTC3892-1 VPRG1 = 0V (LTC3892 Only) VPRG1 = INTVCC (LTC3892 Only) –0.002 4 4 ±0.05 6 6 µA µA µA 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, ∆ITH Voltage = 1.2V to 0.7V l 0.01 0.1 % (Note 4) Measured in Servo Loop, ∆ITH 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) VDRVSET = 0V Pulse-Skipping or Forced Continuous Mode (One Channel On) RUN1 = 5V and RUN2 = 0V or RUN2 = 5V and RUN1 = 0V, VFB1,2 = 0.83V (No Load) 1.6 mA Pulse-Skipping or Forced Continuous Mode (Both Channels On) RUN1,2 = 5V, VFB1,2 = 0.83V (No Load) 2.8 mA Sleep Mode (One Channel On) RUN1 = 5V and RUN2 = 0V or RUN2 = 5V and RUN1 = 0V, VFB1,2 = 0.83V (No Load) l 29 55 µA Sleep Mode (Both Channels On) RUN1,2 = 5V, VFB1,2 = 0.83V (No Load) 34 55 µA Shutdown RUN1,2 = 0V 3.6 10 µA UVLO Undervoltage Lockout DRVCC Ramping Up DRVUV = 0V DRVUV = INTVCC l l 4.0 7.5 4.2 7.8 V V DRVCC Ramping Down DRVUV = 0V DRVUV = INTVCC l l 3.6 6.4 3.8 6.7 4.0 7.0 V V VOVL1,2 Feedback Overvoltage Protection Measured at VFB1,2 Relative to Regulated VFB1,2 7 10 13 % ISENSE1,2+ SENSE+ Pin Current ±1 µA ISENSE1,2– SENSE– Pins Current VOUT1,2 < VINTVCC – 0.5V VOUT1,2 > VINTVCC + 0.5V 700 ±1 µA µA DFMAX(TG) Maximum Duty Factor for TG In Dropout, FREQ = 0V 97.5 99 % ITRACK/SS1,2 Soft-Start Charge Current VTRACK/SS1,2 = 0V 8 10 12 µA |
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Similar Description - LTC3892_15 |
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