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MAX5954 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX5954 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 22 page Single PCI Express, Hot-Plug Controller 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. (All voltages referenced to GND, unless otherwise noted.) 12VIN......................................................................-0.3V to +14V 12G............................................................-0.3V to (V12VIN + 6V) 12S, 12S-, 3.3G ......................................-0.3V to (V12VIN + 0.3V) 3.3VAUXIN, ON, FAULT ..........................................-0.3V to +6V PWRGD ....................................................................-0.3V to +6V PGND ....................................................................-0.3V to +0.3V All Other Pins to GND......................-0.3V to (V3.3VAUXIN + 0.3V) Continuous Power Dissipation (TA = +70°C) 36-Pin Thin QFN (derate 26.3mW/°C above +70°C).....2.105W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C ELECTRICAL CHARACTERISTICS (V12VIN = V12S- = V12S+ = 12V, V3.3S+ = V3.3S- = V3.3VAUXIN = VON = VAUXON = VFON = 3.3V, PWRGD = FAULT = PORADJ = TIM = OUTPUT = 12G = 3.3G = OPEN, INPUT = PRES-DET = PGND = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 12V SUPPLY 12V Supply Voltage Range V12VIN 10.8 12 13.2 V V12VIN rising 9.5 10 10.5 12VIN Undervoltage Lockout V12UVLO Hysteresis 0.1 V 12VIN Supply Current I12VIN V12VIN = 13.2V 0.5 1mA 12VIN CONTROL 12VIN Current-Limit Threshold (V12S+ - V12S-) V12ILIM 49 54 59 mV 12G Gate Charge Current I12G_CHG V12G = GND 4 5 6 µA Normal turn-off, ON = GND, V12G = 2V 50 150 250 µA 12G Gate Discharge Current I12G_DIS Output short-circuit condition, strong gate pulldown to regulation, V12VIN - V12S_ ≥ 1V, V12G_= 5V 50 120 180 mA 12G Gate High Voltage (V12G - V12VIN) V12GH I12G = 1µA 4.8 5.3 5.8 V 12G Threshold Voltage For PWRGD Assertion VPGTH12 Referred to V12VIN, I12G_ = 1µA (Note 2) 3.0 4 4.8 V 12S- Input Bias Current 1µA 12S+ Input Bias Current 20 60 µA 3.3V SUPPLY 3.3V Supply Voltage Range V3.3S+ 3.0 3.3 3.6 V 3.3S+ rising 2.52 2.65 2.78 V Undervoltage Lockout (Note 3) Hysteresis 30 mV |
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