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MAX5950ETJ Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX5950ETJ Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 28 page 12V PWM Controller with Hot-Swap 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (VIN = VPWM_IN = 12V or VIN = VPWM_IN = VREG = 5V, VDREG = VREG, VPGND = 0V, VSYNCIN = 0V, RRT = 100k Ω, RILIM = 60kΩ, CREG = 2.2µF, TA = TJ = -40°C to +85°C, unless otherwise noted. Typical values are at TA = TJ = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SENSE Input Bias Current -1 +1 µA PGOOD Internal Pullup Current 10 µA PGOOD Output-Voltage Low IPGOOD = -2.4mA 50 mV INTERNAL VOLTAGE REGULATOR Output-Voltage Set Point VREG 4.7 5.3 V Line Regulation VPWM_IN = 8V to 16V 1 mV/V Load Regulation IREG = 0 to 50mA 150 mV PWM OSCILLATOR Oscillator Frequency Range fSW VSYNCIN = 0V, fSW = 5 x 1010 / RRT Hz 100 1000 kHz fSW ≤ 500kHz -2.5 +2.5 TA = TJ = +25°C fSW > 500kHz -4 +4 fSW ≤ 500kHz -3.5 +3.5 Oscillator Accuracy TA = TJ = -40°C to +85°C fSW > 500kHz -5 +5 % RT Voltage VRT 50k Ω ≤ RRT ≤ 500kΩ 2V Maximum Duty Cycle VSYNCIN = 0V, VPWM_IN = 12V 82 88 % SYNCIN High Level Voltage 2.1 V SYNCIN Low Level Voltage 0.8 V SYNCIN Pulldown Resistor 50 100 150 k Ω SYNCIN Rising to SYNCOUT Falling Delay 10 ns SYNCIN Falling to SYNCOUT Rising Delay 30 ns Maximum SYNCIN Frequency 1 MHz SYNCOUT Voltage High VHSYNCOUT ISYNCOUT = +1.2mA VREG - 0.1 V SYNCOUT Voltage Low VLSYNCOUT ISYNCOUT = -2.4mA 50 mV PWM ERROR AMPLIFIER FB Input Range 0 VREF V FB Input Current -250 +250 nA COMP Output-Voltage Range ICOMP = -500µA to +500µA 0.25 VREG - 0.5 V Open-Loop Gain 80 dB Unity-Gain Bandwidth fGBW 2.5 MHz Reference Voltage VREF ICOMP = -500µA to +500µA 792 800 808 mV PWM COMPARATOR Comparator Offset Voltage 0.3 V Comparator Propagation Delay 40 ns PWM DIGITAL SOFT-START Soft-Start Duration 1024 Clocks 128 Steps Reference Voltage Steps 6.3 mV |
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