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MAX1962 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX1962 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 29 page 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining 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. VCC, CTL_, CS, FSET/SYNC, SEL, EN, OUT to GND ..........................................................-0.3V to +6V ILIM, COMP, REF, FB, CLKOUT, C- to GND ..............................................-0.3V to VAVDD + 0.3V C+ to GND.............-0.3V to higher of VVCC + 1V or VVDD + 0.3V VDD, AVDD to GND ..............-0.3V to higher of VVCC - 0.3V or 6V DL to PGND ................................................-0.3V to VVDD + 0.3V BST to GND ............................................................-0.3V to +12V DH to LX ...................................................................-0.3V to +6V LX to BST..................................................................-6V to +0.3V PGND to GND, or VDD to AVDD ............................-0.3V to +0.3V Continuous Power Dissipation (TA = +70°C) 20-Pin QSOP (derate up to +70°C)..............................727mW 20-Pin QSOP (derate above +70°C) ........................9.1mW/°C Operating Temperature Range (Extended).........-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 (VVCC = 3.3V, Circuits of Figures 9–12, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Input Voltage Range 2.35 5.5 V VCC Input Voltage UVLO Rising or falling, hysteresis = 33mV (typ) 1.95 2.3 V VDD Input Voltage UVLO Rising or falling, hysteresis = 44mV (typ) 3.9 4.45 V Output Voltage 0.8 V MAX1960/MAX1962 (measured at FB) 0.796 0.800 0.804 SEL = GND 1.492 1.500 1.508 SEL = REF 1.791 1.800 1.809 SEL not connected 2.487 2.500 2.514 DC Output Accuracy MAX1961/ MAX1962 (FB = VDD), measured at output SEL = VDD 3.272 3.300 3.336 V Positive Voltage-Margining Shift MAX1960/MAX1961 +3.8 +4 +4.2 % Negative Voltage-Margining Shift MAX1960/MAX1961 -3.8 -4 -4.2 % Load Regulation Error 0V to full load 0.08 % Line Regulation Error VVCC = 2.7V to 5.5V 0.1 % FB Input Bias Current -0.2 +0.2 µA Feedback Transconductance 1 2 3 mS COMP Discharge Resistance In shutdown 10 100 Ω DC-DC Soft-Start Time 1280 cycles FSET/SYNC = GND 450 500 550 Switching Frequency FSET/SYNC = VCC 880 1000 1120 kHz SYNC Frequency Range 450 1200 kHz Maximum Duty Cycle f = 1MHz 80 83 % Maximum Duty Cycle f = 500kHz 90 92 % Quiescent Supply Current 11 15 mA Shutdown Supply Current 15 µA |
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