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MAX8795AETJ+ Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX8795AETJ+ Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 30 page TFT-LCD DC-DC Converter with Operational Amplifiers 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. IN, CTL to AGND ...................................................-0.3V to +7.5V COMP, FB, FBP, FBN, DEL, REF to AGND ....-0.3V to (VIN + 0.3V) PGND, BGND to AGND ......................................................±0.3V LX to PGND ............................................................-0.3V to +20V SUP to AGND .........................................................-0.3V to +20V DRVP to AGND.......................................................-0.3V to +36V POS_, NEG_, OUT_ to AGND ...................-0.3V to (VSUP + 0.3V) DRVN to AGND ...................................(VIN - 30V) to (VIN + 0.3V) SRC to AGND .........................................................-0.3V to +40V COM, DRN to AGND ................................-0.3V to (VSRC + 0.3V) DRN to COM............................................................-30V to +30V POS_ to NEG_ RMS Current ...................................5mA (Note 1) OUT_ Maximum Continuous Output Current....................±75mA LX Switch Maximum Continuous RMS Current .....................1.6A Continuous Power Dissipation (TA = +70°C) 32-Pin Thin QFN (derate 34.5mW/°C above +70°C) 2758mW 32-Pin LQFP (derate 48.4mW/°C above +70°C)....1652.9mW Operating Temperature Range, E Grade ............-40°C to +85°C Operating Temperature Range, G Grade .........-40°C to +105°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) .......................................+260°C ELECTRICAL CHARACTERISTICS (VIN = 3V, VMAIN = VSUP = 14V, VPGND = VAGND = VBGND = 0V, IREF = 25µA, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IN Supply Range VIN (Note 2) 2.5 6.0 V IN Undervoltage-Lockout Threshold VUVLO VIN rising, typical hysteresis = 50mV 2.05 2.25 2.45 V VFB = VFBP = 1.3V, VFBN = 0V, LX not switching 0.6 1.0 IN Quiescent Current IIN VFB = 1.2V, VFBP = 1.4V, VFBN = 0V, LX switching 23 mA Duration-to-Trigger Fault Condition FB or FBP below threshold or FBN above threshold 200 ms TA = +25 °C to +85°C 1.238 1.250 1.262 REF Output Voltage No external load TA = 0 °C to +85°C 1.232 1.250 1.266 V REF Load Regulation 0 < ILOAD < 50µA 10 mV REF Sink Current In regulation 10 µA REF Undervoltage Lockout Threshold Rising edge; typical hysteresis = 160mV 1.15 V Temperature rising +160 Thermal Shutdown Hysteresis 15 °C 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 +85°C 1.221 1.233 1.245 FB Regulation Voltage VFB No load TA = 0 °C to +85°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 Note 1: See Figure 2 for the op amp clamp structure. |
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