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LT3758IMSETRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LT3758IMSETRPBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 36 page  LT3758 3 3758f ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temp- erature range, otherwise specifications are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Operating Range 5.5 100 V VIN Shutdown IQ SHDN/UVLO = 0V SHDN/UVLO = 1.15V 0.1 1 6 μA μA VIN Operating IQ VC = 0.3V, RT = 41.2k 1.6 2.2 mA VIN Operating IQ with Internal LDO Disabled VC = 0.3V, RT = 41.2k, INTVCC = 7.5V 350 400 μA SENSE Current Limit Threshold l 100 110 120 mV SENSE Input Bias Current Current Out of Pin –65 μA Error Amplifier FBX Regulation Voltage (VFBX(REG)) FBX > 0V (Note 3) FBX < 0V (Note 3) l l 1.569 –0.816 1.6 –0.800 1.631 –0.784 V V FBX Overvoltage Lockout FBX > 0V (Note 4) FBX < 0V (Note 4) 6 7 8 11 10 14 % % FBX Pin Input Current FBX = 1.6V (Note 3) FBX = –0.8V (Note 3) –10 70 100 10 nA nA Transconductance gm (ΔIVC/ΔFBX) (Note 3) 230 μS VC Output Impedance (Note 3) 5 MΩ VFBX Line Regulation (ΔVFBX/[ΔVIN • VFBX(REG)]) FBX > 0V, 5.5V < VIN < 100V (Notes 3, 6) FBX < 0V, 5.5V < VIN < 100V (Notes 3, 6) 0.006 0.005 0.025 0.03 %/V %/V VC Current Mode Gain (ΔVVC /ΔVSENSE) 5.5 V/V VC Source Current VC = 1.5V –15 μA VC Sink Current FBX = 1.7V FBX = –0.85V 12 11 μA μA Oscillator Switching Frequency RT = 41.2k to GND, FBX = 1.6V RT = 140k to GND, FBX = 1.6V RT = 10.5k to GND, FBX = 1.6V 270 300 100 1000 330 kHz kHz kHz RT Voltage FBX = 1.6V 1.2 V Minimum Off-Time 220 ns Minimum On-Time 220 ns SYNC Input Low 0.4 SYNC Input High 1.5 SS Pull-Up Current SS = 0V, Current Out of Pin –10 μA Low Dropout Regulator INTVCC Regulation Voltage l 7 7.2 7.4 V INTVCC Undervoltage Lockout Threshold Falling INTVCC UVLO Hysteresis 4.3 4.5 0.5 4.7 V V INTVCC Overvoltage Lockout Threshold 17.5 V INTVCC Current Limit VIN = 100V VIN = 20V 11 16 50 22 mA mA INTVCC Load Regulation (ΔVINTVCC /VINTVCC) 0 < IINTVCC < 10mA, VIN = 8V –1 –0.4 % INTVCC Line Regulation (ΔVINTVCC /[ΔVIN • VINTVCC]) 8V < VIN < 100V 0.005 0.02 %/V Dropout Voltage (VIN – VINTVCC)VIN = 6V, IINTVCC = 10mA 500 mV |
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