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MAX8643AETG+ Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX8643AETG+ Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 16 page 3A, 2MHz Step-Down Regulator with Integrated Switches 4 _ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ _ PARAMETER CONDITIONS MIN TYP MAX UNITS ENABLE EN Input Logic-Low, Falling 1.2 0.7 V EN Input Logic-High, Rising 1.7 1.4 V EN Hysteresis 200 mV TA = +25°C 1 EN, Input Current VEN = 0V or 3.6V, VDD = 3.6V TA = +85°C 0.01 µA SS SS Charging Current VSS = 0.45V 7 8 9 µA SS Discharge Resistance 500 Ω THERMAL SHUTDOWN Thermal-Shutdown Threshold +165 °C Thermal-Shutdown Hysteresis 20 °C POWER-GOOD (PWRGD) Power-Good Threshold Voltage VFB falling, 3mV hysteresis 87 90 93 % Power-Good Falling-Edge Deglitch 48 Clock cycles PWRGD Output-Voltage Low IPWRGD = 4mA 0.03 0.15 V PWRGD Leakage Current VDD = VPWRGD = 3.6V, VFB = 0.9V 0.01 µA OVERCURRENT LIMIT Current-Limit Startup Blanking 128 Clock cycles Restart Time 1024 Clock cycles Note 2: Specifications are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design and characterization. Note 3: Guaranteed by design. ELECTRICAL CHARACTERISTICS (continued) (VIN = VDD = 3.3V, VFB = 0.5V, TA = -40°C to +85°C. Typical values are at TA = +25°C, circuit of Figure 1, unless otherwise noted.) (Note 2) Typical Operating Characteristics (Typical values are at VIN = VDD = 3.3V, VOUT = 1.8V, RFREQ = 50kΩ, IOUT = 3A, and TA = +25°C, unless otherwise noted.) EFFICIENCY vs. OUTPUT CURRENT OUTPUT CURRENT (A) 40 50 60 80 70 90 100 0.1 1 10 VOUT = 1.8V VOUT = 2.5V VIN = VDD = 3.3V VOUT = 1.2V EFFICIENCY vs. OUTPUT CURRENT OUTPUT CURRENT (A) 60 65 75 70 80 85 90 95 100 0.1 1 10 VOUT = 1.5V VOUT = 1.88V VIN = VDD = 2.5V VOUT = 1.2V |
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