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MAX8643A_0709 Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX8643A_0709 Datasheet(HTML) 6 Page - Maxim Integrated Products |
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6 / 16 page  3A, 2MHz Step-Down Regulator with Integrated Switches 6 _ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ _ Typical Operating Characteristics (continued) (Typical values are at VIN = VDD = 3.3V, VOUT = 1.8V, RFREQ = 50kΩ, IOUT = 3A, and TA = +25°C, unless otherwise noted.) INPUT CURRENT vs. INPUT VOLTAGE INPUT VOLTAGE (V) 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 0 1 2 3 4 5 6 7 8 9 10 VEN = 0V CURRENT LIMIT vs. OUTPUT VOLTAGE OUTPUT VOLTAGE (V) 0.5 1.0 1.5 2.0 2.5 0 1 2 3 4 5 6 7 HICCUP CURRENT LIMIT 400 µs/div MAX8643A toc12 IIN IOUT VOUT 5A/div 1A/div 1V/div 0A 0A 0V RMS INPUT CURRENT DURING SHORT CIRCUIT vs. INPUT VOLTAGE (C4 = 0.022 µF) INPUT VOLTAGE (V) 2.0 2.5 3.0 3.5 4.0 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 VOUT = 0V EXPOSED PAD TEMPERATURE vs. AMBIENT TEMPERATURE TEMPERATURE ( °C) 0 20406080 100 10 20 30 40 50 60 70 80 90 100 110 VOUT = 1.8V 3A LOAD MEASURED ON A MAX8643EVKIT FEEDBACK VOLTAGE vs. TEMPERATURE TEMPERATURE ( °C) -40 -15 10 35 60 85 0.56 0.57 0.58 0.59 0.60 0.61 0.62 0.63 0.64 SOFT-START WITH REFIN 200 µs/div MAX8643A toc16 VPWRGD VOUT VREFIN IIN 1V/div 2V/div 1A/div 0V 0V 0A 0.5V/div 0V STARTING INTO PREBIAS OUTPUT 100 µs/div CSS = 6800pF, CO = 122 µF, L = 0.56µH, VOUT = 2.5V MAX8643A toc17 2V/div 2V/div VEN VOUT VPWRGD 0V 0V 1V/div 0V |
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