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MAX8795AGCJ Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX8795AGCJ Datasheet(HTML) 7 Page - Maxim Integrated Products |
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7 / 31 page  TFT-LCD DC-DC Converter with Operational Amplifiers _______________________________________________________________________________________ 7 ELECTRICAL CHARACTERISTICS (continued) (VIN = 3V, VMAIN = VSUP = 14V, VPGND = VAGND = VBGND = 0V, IREF = 25µA, TA = 0°C to +105°C. Typical values are at TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAIN STEP-UP REGULATOR Output Voltage Range VMAIN VIN 18 V Operating Frequency fOSC 1000 1200 1400 kHz Oscillator Maximum Duty Cycle 86 90 93 % TA = +25°C to +105°C 1.221 1.233 1.245 FB Regulation Voltage VFB No load TA = 0°C to +105°C 1.212 1.233 1.248 V FB Fault Trip Level VFB falling 1.10 1.14 1.17 V FB Load Regulation 0 < IMAIN < full load, transient only -1 FB Line Regulation VIN = 2.5V to 6V 0.1 ±0.4 %/V FB Input Bias Current VFB = 1.233V +100 +200 nA FB Transconductance ∆ICOMP = ±2.5µA 75 160 280 µS FB Voltage Gain From FB to COMP 700 V/V LX On-Resistance RLX(ON) ILX = 200mA 160 300 m Ω LX Leakage Current ILX VLX = 19V 10 20 µA LX Current Limit ILIM VFB = 1.2V, duty cycle = 75% 2.5 3.0 3.5 A Current-Sense Transresistance 0.1 0.2 0.3 V/A Soft-Start Period tSS 14 ms Soft-Start Step Size VREF / 128 V OPERATIONAL AMPLIFIERS SUP Supply Range VSUP 6.0 18.0 SUP Overvoltage Fault Threshold 18.0 19 19.9 V SUP Supply Current ISUP Buffer configuration, VPOS_ = VSUP / 2, no load 3.5 5.0 mA Input Offset Voltage VOS (VNEG_, VPOS_, VOUT_) ≅ VSUP / 2 0 12 mV Input Bias Current IBIAS (VNEG_, VPOS_, VOUT_) ≅ VSUP / 2 -50 0 +50 nA Input Common-Mode Voltage Range VCM 0VSUP V Common-Mode Rejection Ratio CMRR 0 ≤ (VNEG_, VPOS_) ≤ VSUP 45 80 dB Open-Loop Gain 125 dB Output Voltage Swing, High VOH IOUT_ = 5mA VSUP - 100 VSUP - 50 mV Output Voltage Swing, Low VOL IOUT_ = -5mA 50 100 mV Short-Circuit Current To VSUP / 2, source or sink 75 130 mA Power-Supply Rejection Ratio PSRR DC, 6V ≤ VSUP ≤ 18V, (VNEG_, VPOS_) ≅ VSUP / 2 60 dB Slew Rate 45 V/µs -3dB Bandwidth RL = 10k Ω, CL = 10pF, buffer configuration 20 MHz |
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Similar Description - MAX8795AGCJ |
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