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LTC3862HUH-TRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3862HUH-TRPBF Datasheet(HTML) 3 Page - Linear Technology |
3 / 40 page LTC3862 3 3862fb ELECTRICAL CHARACTERISTICS (Notes 2, 3) The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, RUN = 2V and SS = open, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Input and INTVCC Linear Regulator VIN VIN Supply Voltage Range 4 36 V IVIN VIN Supply Current Normal Mode, No Switching Shutdown (Note 5) VRUN = 0V l l 1.8 30 3.0 80 mA μA INTVCC LDO Regulator Output Voltage 4.8 5.0 5.2 V dVINTVCC(LINE) Line Regulation 6V < VIN < 36V 0.002 0.02 %/V dVINTVCC(LOAD) Load Regulation Load = 0mA to 20mA –2 % VUVLO INTVCC UVLO Voltage Rising INTVCC Falling INTVCC 3.3 2.9 V V 3V8 LDO Regulator Output Voltage 3.8 V Switcher Control Loop VFB Reference Voltage VITH = 0.8V (Note 6) E-Grade (Note 3) I-Grade and H-Grade (Note 3) l l 1.210 1.199 1.223 1.223 1.235 1.248 V V dVFB/dVIN Feedback Voltage VIN Line Regulation VIN = 4V to 36V (Note 6) ±0.002 0.01 %/V dVFB/dVITH Feedback Voltage Load Regulation VITH = 0.5V to 1.2V (Note 6) 0.01 0.1 % gm Transconductance Amplifier Gain VITH = 0.8V (Note 6), ITH Pin Load = ±5μA 660 μMho f0dB Error Amplifier Unity-Gain Crossover Frequency (Note 7) 1.8 MHz VITH Error Amplifier Maximum Output Voltage (Internally Clamped) VFB = 1V, No Load 2.7 V Error Amplifier Minimum Output Voltage VFB = 1.5V, No Load 50 mV IITH Error Amplifier Output Source Current –30 μA Error Amplifier Output Sink Current 30 μA IFB Error Amplifier Input Bias Currents (Note 6) –50 –200 nA VITH(PSKIP) Pulse Skip Mode Operation ITH Pin Voltage Rising ITH Voltage (Note 6) Hysteresis 0.275 25 V mV ISENSE(ON) SENSE Pin Current 0.01 2 μA VSENSE(MAX) Maximum Current Sense Input Threshold VSLOPE = Float, Low Duty Cycle (Note 3) l 65 60 75 75 85 90 mV mV VSENSE(MATCH) CH1 to CH2 Maximum Current Sense Threshold Matching VSLOPE = Float, Low Duty Cycle (Note 3) (VSENSE1 – VSENSE2) l –10 10 mV RUN/Soft-Start IRUN RUN Source Current VRUN = 0V VRUN = 1.5V –0.5 –5 μA μA VRUN High Level RUN Channel Enable Threshold 1.22 V VRUNHYS RUN Threshold Hysteresis 80 mV ISS SS Pull-Up Current VSS = 0V –5 μA RSS SS Pull-Down Resistance VRUN = 0V 10 kΩ Oscillator fOSC Oscillator Frequency RFREQ = 45.6k RFREQ = 45.6k l 280 260 300 300 320 340 kHz kHz Oscillator Frequency Range l 75 500 kHz VFREQ Nominal FREQ Pin Voltage RFREQ = 45.6k 1.223 V |
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